African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006

AJAR Articles

April 2018

Genotype by environment interaction (GxE) as a measure of yield stability of Dutch potato varieties in Uganda

Twenty one (21) Dutch potato varieties were introduced in Uganda during 2015-2016 seasons for national yield performance and adaptability studies so that most stable varieties could be identified for production.  The effect of genotype (G), environment (E) and their interaction (G x E) on tuber yield was assessed to establish variety adaptation in different agro ecologies. Five sites were used in the study that...

Author(s): Arinaitwe Abel Byarugaba, Mateeka Benon, Deo Tibanyedera and Alex Barekye

April 2018

Nutrient absorption march and accumulation of nutrients in developing Roxo de Valinhos fig (Ficus carica L.) tree, cultivated under different water regimes

The nutrient absorption march in fig (Ficus carica L.) trees and other fruit trees has been studied only at the seedling stage, and little is known about nutrient accumulation in perennial plants when the entire life cycle of the plant is considered. To this end, the present study aimed to evaluate nutrient accumulation in the Roxo de Valinhos fig tree, cultivated with and without supplemental irrigation. The split-plot...

Author(s): Manoel Euzébio de Souza, Sarita Leonel, Andréa Carvalho da Silva, Adilson Pacheco de Souza, Ana Heloisa Maia, Roberto Lyra Villas Boas and Adriana Aki Tanaka

April 2018

Nitrogen and phosphate fertilizers in elephant-grass for energy use

Nitrogen is the mineral element that plants most require. Its deficiency quickly inhibits plant growth. Excessive nitrogen fertilization raises the cost of biomass production. Therefore, there is a need to find the appropriate dose of nitrogen fertilizer that provides greater efficiency in dry matter production. The objective of this study was to evaluate the effects of nitrogen and phosphate fertilizers on the chemical...

Author(s): José Augusto de Almeida Sant&#;Ana, Rogério Figueiredo Daher, Niraldo José Ponciano, Marcia Maria Paes Santos, Alexandre Pio Viana, Erik da Silva Oliveira, Francisco José da Silva Ledo, Bruna Rafaela da Silva Menezes, Carlos Lacy Santos and Wallace Luís de Lima  

April 2018

Thermal comfort analysis of agricultural machinery operators with thermography

Heat stress appears as a strong candidate for physical wear and tear, leading to lower yields and high risks of accidents due to lack of attention. In this context, this work aims to study the possible influence of the internal temperature of metal roof tractor, skin temperature of face operator, relating it to possible physiological responses connected with environmental variables such as relative humidity air and wind...

Author(s): Murilo Mesquita Baesso, Vinicius Bertuga Do Amaral, Alcir José Modolo, Clovis Fischer, Emerson Trogello,  Jonathas Cassimiro Silvestrini, Raquel Couto Evangelista Baesso and Marco Aurélio Spoljaric Gonçalves  

April 2018

Towards being equal to them: Impact of organic certified production systems on women empowerment in agriculture

The objective of the study was to determine the degree of women empowerment in agriculture as well as examine the effect of organic certification and other socio-economic and cultural factors on women empowerment in agriculture in Kenya. This objective was achieved using data from peri-urban vegetable and rural honey producing households. It followed the innovative multidimensional measurement of women empowerment in...

Author(s): Oscar Ingasia Ayuya  

April 2018

Genotypic variability in some sun flower (Helianthus annuus L.) hybrids evaluated in Khordunia under rainfed conditions

Twenty locally generated hybrids of Sun flower (Helianthus annuus L.) hybrids were evaluated in two seasons (2012 and 2013) for yield and yield components at Khordunia area, Blue Nile State under rain fed conditions. A randomized complete block design with six replications was used for laying out the field experiments. The seeds were sown in the second and third week of July in the first and second seasons, respectively...

Author(s): Mohamed E. K. Fadlalla, Hashim A. Fadlalla, Abdelwahab H. Adbdalla and Murwan K. Sabahelkhair  

April 2018

Prospection and production of Solanaceae species resistant to the root knot nematode

Plant species of Solanaceae family are affected by numerous pathogens worldwide. Among them is the root-knot nematode which hinders the establishment of crops in the field, reducing their production capacity. This work aims to select Solanaceae species tolerant or resistant to root-knot nematode under the climatic conditions of Fortaleza, Ceará. Two experiments were performed. For both, the followings were...

Author(s): Janiquelle da Silva Rabelo, Marcelo de Almeida Guimarães, Carmen Dolores Gonzaga Santos, Benedito Pereira Lima Neto, Ana Régia Alves de Araújo Hendges, Caris dos Santos Viana, Jean Paulo de Jesus Tello and Hozano de Souza Lemos Neto

April 2018

Effects of market price, cultivating area and price regulation on cotton production in China

This study examines the quantitative effects of market price in cotton producing areas of China. It also analyzes the qualitative effects of price regulation on cotton production. Secondary time series data were collected from National Bureau of Statistics in China, between 1990 and 2013. Calculation of the growth rate of cotton in production was done using linear trend model and multi-regression model to analyze the...

Author(s): Mansoor Ahmed Koondhar#, Lingling Qiu#, Xingyue Liu, Fahmida Abbassi, Masroor Ali Koondhar and He Ge  

April 2018

Effect of calcium chloride dipping treatment on quality of Ziziphus spina-christi L. fruits during cold storage

Zizyphus spina-christi L. is one of the wide varieties of plant grown in Al-Ahsa Oasis in Saudi Arabia and known locally as Alnabaq (buckthorn). The objective of this investigation was to study the effects of postharvest calcium chloride applications on fruit quality of buckthorn under cold storage condition at 2°C and 90% RH for 5 weeks.¬¬ Fruits were dipped in calcium chloride at different concentrations...

Author(s): Mohamed S. AL-Saikhan  

April 2018

Saflufenacil and indaziflam herbicide effects on agricultural crops and microorganisms

The herbicides saflufenacil and indaziflam have recently been registered in Brazil for weed control in sugarcane crops; however, little information exists regarding their residual effects or influences on soil microorganisms. Therefore, the present study aimed: (a) to determine the effects of saflufenacil and indaziflam on soil microorganisms and (b) to evaluate the residual and dose effects of these herbicides on...

Author(s): Beatriz Alexandre Torres, Silvana Perissatto Meneghin, Nágilla Moraes Ribeiro, Paulo Henrique Vieira dos Santos, Bruna Ferrari Schedenffeldt, and Patricia Andrea Monquero  

April 2018

Integrated crop management (ICM) for increasing rice production in Barind area

An experiment was conducted at the Agronomy Field Laboratory, University of Rajshahi during the period from June, 2015 to December 2015 to study the effect of Integrated Crop Management (ICM) practice for increasing rice production in Barind area, Bangladesh. The experiment consisted of two factors that is, two variety which is BRRI dhan56 and BRRI dhan57, and five management practices like control, only weed...

Author(s): N. Khatun, M. A. Rahman and P. Devi

April 2018

Quality of Soil in the function of biological fertilization and plant covering

The yield of soybean was influenced by the chemical and microbiological properties of the soil, which was favored by management techniques that promote improvement in soil quality. The objective of this study was to evaluate soybean yield, chemical and microbiological quality of the soil as a function of biological fertilization and soil cover conditions. The experiment was conducted in both crops seasons 2015/16 and...

Author(s): João Paulo Ascari, Dejânia Vieira de Araújo, Inês Roeder Nogueira Mendes, Marcos Vinícius Foschiera, Rafael Sbruzzi Prieto, Wagner Henrique Moreira Barboza, Willian Krause and Leopoldo Sussumu Matsumoto

April 2018

A survey of the insect pests and farmers’ practices in the cropping of yellow pepper Capsicum annuum Linnaeus in Enugu State of Eastern Nigeria

Yellow pepper (Capsicum annuum L.) is the second market gardening crop after tomato, and subsequently, a major source of income to farmers in Nigeria. Pests and diseases reduce yields and quality of marketable fruits. A study was conducted in Ibagwa-Agu, Lejja, Edem, Alor-Uno and Eha-Alumona agro-based communities of Nsukka Local Government Area to assess the economic implications of insect infestation and control...

Author(s): Ekenma Julia Agwu, Gregory Ejikeme Odo, Felicia Ekeh, Gerald Nnadi Attamah, Michael Uwagbae and Chukwuemeka Eze

April 2018

Seed health tests of traditional leafy vegetables and pathogenicity in plants

Traditional leafy vegetables play a significant role in the daily diets of many people in Zimbabwe. They are produced by smallholder farmers with limited knowledge on the agronomic value of high-quality seed, on seed storage, and on plant- and seed-borne pathogens. The quality of the seed is rarely tested for seed-borne pathogens posing risks of pathogen build-up. This study was conducted in order to determine the...

Author(s): Praxedis Dube, Paul C. Struik and Elizabeth Ngadze

April 2018

Soybean development under soil water deficit

One of the main factors affecting soybean development is water deficiency, especially when it occurs during the flowering and pods filling stages. Thus, this study aimed to evaluate the soybean development under soil water deficit in different phenological phases, under soil and climatic conditions of Bom Jesus, Piaui State, Brazil. The test was conducted at São Luiz Farm, located 3 km from Bom Jesus  to...

Author(s): Marcelo Simeão, Aderson Soares de Andrade Junior, Everaldo Moreira da Silva, Aureliano de Albuquerque Ribeiro and Edson Alves Bastos

April 2018

Rice farmers’ perception of climate change and adaptation strategies in the Ketu North District, Volta Region of Ghana

This study assessed rice farmers’ perception of climate change and adaptation strategies in the Ketu North District, Volta Region of Ghana. Climate variables particularly precipitation and temperature were taken in the climate change perception study. Multistage sampling technique was used to select 340 rice farmers from six farming sections, and a structured questionnaire was used to elicit data from the...

Author(s): Jacob Binda Kolleh and Marcus Tobodawolo Jones

April 2018

Cropping systems and soil quality and fertility in south-central Uganda

Little is known about how cropping systems influence soil quality and fertility in Uganda. Some cropping systems are more valued and as a result are given more nutrients and planted in certain soils, all of which leads to varying soil quality and fertility. This study compared soil quality (soil pH, cation exchange capacity (CEC), electric conductivity (EC), total N, and depth to restrictive layer (DRL)) and fertility...

Author(s): Nataliya Apanovich, and Andrew W. Lenssen

April 2018

Bacaba-de-leque (Oenocarpus distichus): A new wet tropics’ nutritional source

The present study aims to determine the nutritional composition of soluble and insoluble fibers, vitamins and minerals in the fruit of bacaba-de-leque (Oenocarpus distichus Mart.) a native Central Amazonian tropical fruit. Results show the fiber contents to be 3.95 g 100 g-1, 100% of which shows to be insoluble fibers. Potassium stood out among the minerals, with 173.85 mg 100 g-1. High vitamin E concentration (6.65 mg...

Author(s): Jaime Paiva Lopes Aguiar and Francisca das Chagas do Amaral Souza

April 2018

Physical, chemical, and microbiological evaluation of a compost conditioned with zeolites

Zeolites are minerals characterized by high cation exchange capacity (CEC). This study evaluated possible effects of zeolites on improving the composting process in terms of the physical, chemical, and microbiological quality of compost and the productivity of the test plant, Raphanus sativus L. Compost enriched with 1.5% ground zeolites exhibited 62% greater degradation of organic particles sized less than 0.125 mm and...

Author(s): Fabricio T. Ramos, Oscarlina L. S. Weber, Eduardo B. Morais, Eliana F. G. C. Dores, Zoraidy M. Lima and João M P Novais

April 2018

Socio-economic and environmental impacts of invasive plant species in selected districts of Bale Zone, Southeast Ethiopia

Understanding the socioeconomic and environmental impacts of invasive plant species from the affected communities’ perspectives is essential to design and plan sustainable control and prevention strategies. Hence, understanding the socio-economic and environmental impacts in the infested and susceptible areas such as Bale zone is very crucial. Therefore, the objective of this study was to assess socio-economic...

Author(s): Mohammed Mussa, Habtamu Teka and Ahimed Aliye

April 2018

Agricultural Knowledge and Technology Transfer Systems in the Southern Ethiopia

Agriculture is the mainstay of the Ethiopian economy. However, the growth of the sector is constrained by different factors. Low level of technology development, inefficient technology dissemination, low utilization of improved production inputs and shortage of research proven production practices are among the most important factors hindering the growth of the sector. The objective of this study was, therefore, to...

Author(s): Tewodros Ayalew and Tesfaye Abebe  

April 2018

Early prediction of internal bruising in potatoes by biospeckle laser technique

The internal bruising in potatoes is a kind of damage caused by the mechanical impact, which is the major cause of post-harvest losses. This kind of injury is hard to detect because it occurs due to the internal cellular rupture of the tuber. This research aims at evaluating the applicability of the biospeckle laser technique in order to detect and predict the internal bruising in potatoes caused by mechanical impacts...

Author(s): Anderson Gomide Costa, Roberto Alves Braga Jr., Eduardo V. B. Vilas Boas and Murilo Risso

April 2018

Influence of reducing sugar contents on sprout growth of blackberry cuttings

The objective of this study was to analyze the use of different doses of indolebutyric acid (IBA) and its influence on reducing sugar contents and the relationship of root and leaf development of mulberry cuttings, using commercial substrates and sand. The experimental design was a completely randomized design, with 3 replicates per plot and 5 cuttings per replicate, in a 3 × 3 factorial scheme, consisting of...

Author(s): Luiz Carlos Pereira, Henrique Menoncini, Fabiola Fernandes Abreu, João Victor de Souza Martins, Rodrigo Gonçalves Mateus, Marcos Barbosa-Ferreira, Cristiano Marcelo Espínola Carvalho, Ricardo Dias Peruca, Cleber Junior Jadoski and Denílson Guilherme

April 2018

Fungistatic activity of essential oil of Lippia sidoides Cham. against Curvularia lunata

Synthetic pesticides used in agriculture to control pathogens are being widely questioned for their harmful effects on human health and the environment. Therefore, the objective of this study was to evaluate the fungistatic activity of Lippia sidoides Cham. essential oil on alternative control of Curvularia lunata (Wakker), the causal agent of spot in maize plants. The fungitoxic contact effect was successful, resulting...

Author(s): Talita Pereira de Souza Ferreira, Dalmarcia de Souza Carlos Mourão, Gil Rodrigues dos Santos, Luiz Gustavo de Lima Guimarães, Ellen Caroline Feitoza Pires, Weder Ferreira Santos and Raimundo Wagner de Souza Aguiar

April 2018

Effects of mineral salts on forage seeds germination

The objective of this study was to evaluate seed germination of three different forage species subjected to saline stress. The seeds remained in salt for 0 to 24 h and were then deposited in field beds. After 15 days, the germination was evaluated from its emergence. The effect of NaCl on germination was evaluated for the following treatments: a) 0 h (control); b) permanence in NaCl for 6 h; c) permanence in NaCl for 12...

Author(s): Suzana Cristina Quintanilha, Erico da Silva Lima, Vanessa Aparecida Feijó de Souza, Tiago Neves Pereira Valente, Bruno Borges Deminicis, Andrea Roberto Bueno Ribeiro, Vitória Gallo Borges de Lima and Agatha Nara Pirondi

April 2018

Environmental conditions of the interior of the tropical forest and regeneration of tree species

This study aimed to analyze the interactions between environmental variables and the occurrence of tree species in the understory of an Atlantic forest fragment in Southeastern Brazil. The vegetation data collection was carried out in ten locations, with trees having diameter at breast height (DBH) larger than 5 cm and with distinct physiographic characteristics, orientation and slope. The following variables were...

Author(s): José Eduardo Macedo Pezzopane, Gilson Fernandes da Silva, Eduardo Alvarez Santos, Miguel Angel Herrera Machuca and Talita Miranda Teixeira Xavier

April 2018

Agronomic efficiency of Bradyrhizobium pre-inoculation in association with chemical treatment of soybean seeds

The competitiveness of Brazilian soybean in the international market is highly dependent on biological nitrogen fixation, whose efficiency is related to factors that affect the survival of the bacteria, such as the chemicals used in the treatment of seeds. The study objective was to evaluate Bradyrhizobium pre-inoculation (10 days before sowing) of soybean seeds treated with fungicides and insecticide compared to the...

Author(s): Krisle da Silva, Edmilson Evangelista da Silva, Eliane do Nascimento Cunha Farias, Josimar da Silva Chaves, Christian Nilton Batista Albuquerque and Carina Cardoso

March 2018

Organomineral fertilization in growth, physiology and phytomass production of castor oil plant BRS energia

This work aims to study the effect of castor oil plant cake doses (0.0; 1,100; 2,200 and 3,300 Kg ha-1) associated with P doses (0.0 and 90 Kg ha-1) and K doses (0.0 and 60 Kg ha-1) on initial growth period of castor oil plant BRS Energia. The experiment was conducted under greenhouse's conditions at the Embrapa Algodão, located in Brazil. The experimental design of randomized blocks was used in a 4x2x2...

Author(s): Márcia Maria Bezerra Guimarães, José Félix de Brito Neto, Cláudio Silva Soares,  Alde Cleber Silva de Lima, Fabrícia de Fátima Araújo Chaves,   Adryageisa Figueiredo Cavalcante,  André Luiz Pereira da Silva and  Joaquim Alves de Lima Junior  

March 2018

Improving salt tolerance and weight percent reduction in tomato by exploiting physio-agronomic seedling traits

Salinity being a serious limitation to crop production is an established fact since ages. It has adversely affected the adaptive behavior of our field crops particularly at seed germination and seedling stages. Identification of particular plant traits conferring salinity tolerance is important for inducing genetic variation among the target traits and adjusting the selection pressure for them in field. This...

Author(s): Muhammad Ahsan Raza, Asif Saeed, Hassan Munir, Adeela Munawar, Atif Kamran, Fazal Rehman and Awais Riaz  

March 2018

Effects of aqueous and oil leaf extracts of Pterocarpus santalinoides on the maize weevil, Sitophilus zeamais pest of stored maize grains

The effects of aqueous and oil leaf extracts of Pterocarpus santalinoides at concentrations of 5, 10, 15 and 20%v/v, each as proctectant in the control of the maize weevil, Sitophilus zeamais, were compared with a conventional insecticide, pirimiphos-methyl at a rate of 0.5 ml / 50 g maize grains of Oba Super II variety in a Completely Randomized Design with four replicates. Parameters assessed, include adult mortality,...

Author(s): Ekeh Felicia Nkechi, Odo Gregory Ejike, Nzei Joy Ihuoma, Ohanu Chinenye Maria-goretti, Ugwu Francis, Ngwu Godwin and Reginald Njokuocha  

March 2018

Effect of seedling fibrous roots on field performance of hybrid coffee varieties

The objective of this study was to evaluate the effect of number of fibrous roots per seedling on plant growth and yield components of hybrid coffee varieties. A split plot experiment in a randomized complete block design (RCBD) with three replications was used. The main factor consisted of five varieties (N39-2, N39-3, N39-7, KP423-1 and KP423-2) whereas the sub-factor consisted of four types of roots (seedlings with...

Author(s): Jeremiah M. Magesa, Theodosy J. Msogoya and Cornel L. Rweyemamu  

March 2018

Allelopathic effects of aqueous extract of leaves and roots of Luetzelburgia auriculata (Allemão) Ducke on seeds germination and initial growth of lettuce (Lactuca sativa L.)

The secondary metabolism of plants produces allelopathic substances which are able to interfere with germination and growth of other species, when released in the environment. In order to evaluate the allelopathic effects of Luetzelburgia auriculata on the germination and early growth of lettuce (Lactuca sativa), leaf extracts and roots were tested in lettuce seeds sowing. The L. auriculata plant material was collected...

Author(s): PINTO Érika do Nascimento Fernandes, SOUTO Jacob Silva, PEREIRA Leonardo Francisco de Assis, BORGES César Henrique Alves and FERNANDES Tássia Rayane Nascimento  

March 2018

Efficacy of the decoction of cashew leaf (Spondias mombin L.) as a natural antiseptic in dairy goat matrices

Microorganisms resistant to conventional antimicrobial substances are becoming more prevalent. Accordingly, natural alternatives have been sought with the use of extracts from medicinal plants whose purpose is to find new compounds with recognized antimicrobial activity. This work aims to show the efficacy of the cajá (Spondias mombin L.) leaf decoction using the microplate dilution technique against...

Author(s): Camila Fernandes Leonêz, Francisco Marlon Carneiro Feijó, Nilza Dutra Alves, Caio Sergio Santos, Gardênia Silvana Oliveira Rodrigues, Fernando da Costa Fernandes and  Tayná Moura Matos  

March 2018

Plant extracts enhancers of defense response in ponkan mandarin Seedlings against Alternaria alternate f. spp. citri infection

The objective of this study was to determine the elicitor potential of plant extracts from Caatinga biome by enzyme activity and epidemiological components of Alternaria brown spot (Alternaria alternate f. spp. citri). These were prepared ethanolic, dichloromethanic, and aqueous extracts from 14 plants (Anadenanthera macrocarpa, Schinopsis brasiliensis, Maytenus rigida, Caesalpinia pyramidalis, C. ferrea, Peltophorum...

Author(s): Kedma Maria Silva Pinto, Paulo Alexandre Fernandes Rodrigues de Melo, Janaína Marques Mondego, Luciana Cordeiro do Nascimento, Maria Izabel Mendes Marques Cortez, Alfredo Augusto de Carvalho Aires, Antônio Pereira dos Anjos Neto, Robson Luís Silva de Medeiros, José Ribamar Gusmão Araújo and Hilderlande Florêncio da Silva  

March 2018

Effects of lime and fertilizer on soil properties and maize yields in acid soils of Western Kenya

Many soils in Western Kenya are acidic and deficient in nitrogen and phosphorus. Acidity hinders crop responses to fertilizers applied to remedy nutrient deficiencies. The common liming materials used to ameliorate acidity are Calcium Oxide (CaO) and Calcium Carbonate (CaCO3) in powdery formulations. Broadcasting these materials by hand followed by incorporation is recommended on smallholder farms to enhance their...

Author(s): Peter A. Opala, Martins Odendo and Francis N. Muyekho  

March 2018

Determinants of small-scale farmers’ adaptation decision to climate variability and change in the North-West region of Cameroon

Small-scale farmers’ adaptation decision in the face of climate variability and change (CVC) depends largely on their ability to perceive the impacts of CVC as well as their degree of vulnerability to these impacts. This research looks at the factors that influence small-scale farmers’ adaptation decision faced with climate variability and change, with particular focus on Mbengwi Central Sub-Division,...

Author(s): Nyong P. Awazi and Martin N. Tchamba

March 2018

Planting density and number of stems for ecological crop determinate growth tomato

Tomato growers adopting an ecologically based system have opted for determinate growth varieties due to their ease of staking and sprouting, and due to the fact that they have a shorter cycle, which reduces phytosanitary problems that usually occur towards the end of the growing season. This study aimed to evaluate yield components and fruit quality of ‘Floradade’ determinate growth tomato in an ecologically...

Author(s): Denise de Souza Martins, Maristela Watthier, José Ernani Schwengber, Diego Rosa da Silva, Ryan Noremberg Schubert and Roberta Marins Nogueira Peil

March 2018

Incidence and severity of maize streak disease: The influence of tillage, fertilizer application and maize variety

Maize streak disease (MSD) is one of the most destructive diseases of maize (Zea mays L.) estimated to cause a yield loss of about 20% in Ghana. Field experiment was conducted at Nkwanta in the Volta Region of Ghana during the cropping seasons of 2015 to assess the effects of tillage practices, fertilizer application and maize variety on the incidence and severity of MSD. The MSD severity was assessed using 1 to 5...

Author(s): D. Blankson, E. Asare-Bediako, K. A. Frimpong, E. Ampofo, K. J. Taah and G. C. Van der Puije  

March 2018

Screening for salinity tolerance of Oryza glaberrima Steud. seedlings

Rice (Oryza sativa) is a salt-sensitive species and improvement of salt resistance is a major goal for plant breeders. Some species of Oryza genus may constitute an interesting source of genes involved in stress resistance for cultivated rice improvement. The African rice Oryza glaberrima is poorly described for its response to salt stress. Twenty-five accessions of O. glaberrima were exposed during 2 weeks to 0 or 60...

Author(s): Hermann Prodjinoto, Christophe Gandonou and Stanley Lutts

March 2018

The effects of intercropping and plant densities on growth and yield of maize (Zea mays L.) and soybean (Glycine max) in the humid forest zone of Mount Cameroon

A field experiment was conducted to evaluate the effects of intercropping and planting densities on the growth and yield of maize (Zea mays) and soybeans (Glycine max).  A 1 ha plot located at the Institute of Agricultural Research for Development (IRAD), Ekona, South West Region of Cameroon was used. There were two blocks: block 1 which was fertilized with 60 kg/ha NPK (20:10:10) and top dressed with urea at 50 kg...

Author(s): Eneke E. Bechem, Agbor N. Ojong and Kingsley A. Etchu

March 2018

Addressing soil organic carbon issues in smallholders’ farms in Ethiopia: Impact of local land management practices

Soil organic carbon plays a key role in plant biomass production. On smallholder farms, crop and livestock are traditionally integrated and support each other. However, due to changes in socio-economic factors, this relationship is lost as resources are mismanaged. The present study was conducted in the Central Ethiopian highlands that represent about 90% of the country’s smallholder farmers. The objective of this...

Author(s): N. A. Minase, M. M. Masafu and A. Tegegne  

March 2018

Leaf content of macronutrients in Tabebuia aurea seedlings grown on different substrates and luminosities

Taking into consideration that species react differently to the substrate and luminance variations, this study aimed to evaluate the leaf content of some macronutrients and dry matter in Tabebuia aurea seedlings through the hypothesis that the growth environment can alter the concentration of chemical elements in the species. The study was conducted in a greenhouse, in randomized blocks, factorial 2 × 3 (two light...

Author(s): Ademir Kleber Morbeck De Oliveira, Sônia Cristina Juliano De Gualtieri, José Antônio Maior Bono, Valtecir Fernandes, Paula Thais Alves Ojeda and Rosemary Matias  

March 2018

Population fluctuation and infestation of Drosophila suzukii in berry crops in Southern Brazil

Drosophila suzukii is an insect pest with high capacity to cause damage to soft-skinned fruit whose behavior on host crops in Brazil is still unknown. This study aims to determine the population fluctuation of D. suzukii on different berry ¬¬¬¬¬¬crops from 2014 to 2017 and infestation. In each orchard, two traps containing attractant (biological yeast + sugar + water) were installed each week;...

Author(s): Daniela Fernanda Klesener, Régis Sivori Silva dos Santos, Luciano Gebler and Lucas de Ross Marchioretto  

March 2018

Maize ideotype breeding for changing environmental conditions

The demand for corn in the developing world will double by the end of 2050. The challenges due to the climate change are real. Where extreme weather events will become more frequent and climate change projections suggest that large yield losses occur in many regions of the world. Corn is cultivated throughout the world and is a strategic crop: can tolerate high radiation intensities and exhibits high efficiency in the...

Author(s): Khunsa Khakwani, Muhammad Rafique, Ahsan Raza Malhi, Muhammad Altaf, Saira Saleem and Muhammad Arshad  

March 2018

Precocious screening tests of the resistance of two varieties of cocoa seedlings (Theobroma cacao L.) from combinations of fertilizers against Phytophthora megakarya (Brasier and Griffin) in nursery

Experiments were conducted to appreciate the resistance level of cocoa seedlings aged three months from combinations of fertilizers against Phytophthora megakarya based on artificial leaf disk inoculation test. The two cocoa varieties involved were: Tafo 79/501 (V1) and SNK 13 (V2). For each variety, 11 treatments with three replicates were used on 33 randomly-selected plants. These include Arbuscular Mycorrhizal Fungi...

Author(s): Pélagie Djenatou, Yves Hernandez Tchétchoua, Philippe Kosma and Eddy Léonard Ngonkeu Magaptcheu,  

March 2018

Genetic divergence in Agave accessions through ISSR markers and phenotypic traits

The Agave genus is composed of about 200 species, but the cultivation of sisal for fiber production in Brazil is restricted to two species: Agave sisalana and Agave fourcroydes, both have several accessions with wide variability. The collection of Agave of Embrapa has 37 accessions maintained in situ and periodically evaluated agronomical traits. Most of these accessions have phenotypic similarities, although they...

Author(s): Silmara Chaves de Souza, José Jaime Vasconcelos Cavalcanti, Jean Pierre Cordeiro Ramos, Isaías Alves, Roseane Cavalcanti dos Santos and Liziane Maria de Lima  

March 2018

Perceptions and clustering of Greek farmers on the new CAP: Opportunity or threat?

This study aims to highlight the problems of the Greek agriculture and to identify the level of information that the farmers have regarding the Common Agricultural Policy (CAP). Here, primary data were collected from in-depth interviews (structured questionnaire) with 241 farmers in the region of Thessaly-Greece. The study was conducted in November 2016, within the geographical boundaries of the Region of Thessaly. The...

Author(s): George Theodossiou, Christos Karelakis and Apostolos Goulas  

March 2018

Cotton growth in response to water supply in red Latosol cerrado

There are few studies that demonstrate the influence of water stress in biometric variables and cotton growth. Thus, the objective of this study was to evaluate different levels of water supply in the BRS 2 cotton growth, in the field of Campus Rio Verde - GO, in 2015. Experimental design used was randomized blocks, with three replications in a split-plot scheme of 5 x 4 with five water replacements (WR) (25, 50, 75,...

Author(s): Vitor Marques Vidal, Frederico Antonio Loureiro Soares, Marconi Batista Teixeira, Fernando Nobre Cunha, Leonardo Nazário Silva dos Santos, Cicero Teixeira Silva Costa, Giovani Santos Moraes, Washington Bezerra, Gustavo da Silva Vieira, Wilker Alves Morais, Aurélio Ferreira Melo, Ana Carolina Oliveira Horschutz, Jenifer Kelly Ferreira dos Santos, Igor Olacir Fernandes Silva and Leandro Spíndola Pereira

March 2018

Diversity of insects in conventional and organic tomato crops (Solanum lycopersicum L., solanaceae)

This study aims to compare the diversity and relative abundance of insect families collected in organic and conventional tomato production systems located in Alagoas, Northeast Brazil (09°81'76"S and 36°59'42"W). In this region, the visible spectrum is quite broad with sunlight throughout the year. Between rows of tomato plants, we set up a system of colored traps colored blue, yellow, white,...

Author(s): Rubens Pessoa de Barros, Ligia Sampaio Reis, Isabelle Cristina Santos Magalhães, Miriany de Oliveira Pereira, Ana Cleia Barbosa de Lira, Claudio Galdino da Silva, Jaciara Maria Pereira e Silva, João Gomes da Costa and Elio Cesar Guzzo

March 2018

Efficacy of Xylopia aethiopica ethanolic and aqueous extracts on the control of Sitophilus oryzae in stored rice grain

Stored product insects reduced the quantity, quality, nutritive value and viability of stored crops such as maize, sorghum, wheat and rice. These pests and many others threaten food security. The study investigated the efficacy of Xylopia aethiopica in the control of Sitophilus oryzae on stored rice. The extracts of this plant were made using ethanol and aqueous as solvent and prepared at the concentrations of 3, 6, 8...

Author(s): Ekeh F. N., Odo G. E., Nzei J., Ngozi E., Ohanu C. and Onuoha O.

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