Abbreviation: Afr. J. Agric. Res.
Start Year: 2006
Page 1 of 257, showing 20 records out of 5127 total, starting on record 1, ending on 20
DOI: 10.5897/AJAR2016.11386[Article Number: 67FDAB361111]
Brazilian semi-arid soils can be dystrophic and often occur in areas with high agricultural potential. Gypsum application improves chemical and physical soil conditions, favoring root system development of plants and can improve sugarcane production for energy production, as a strategy for sustainable development, avoiding native vegetation destruction in semi-arid regions. This study aimed to analyze the impact of... Read more.
DOI: 10.5897/AJAR2016.11297[Article Number: 7C6CA1E61115]
Since silicon and potassium are nutrients that influence plant physiological and biochemical aspects, the combined use of these minerals in the fertilization of cultivated plants has been increasingly investigated. This study aimed to evaluate the gas exchanges (Net photosynthesis, Stomatal conductance, Transpiration, Water use efficiency, Carboxylation efficiency, Internal carbon concentration, Chlorophyll a, b, total,... Read more.
DOI: 10.5897/AJAR2016.11530[Article Number: B73B6B361118]
The objective was to evaluate the effect of tannery sludge vermicompost in the chemical properties of soil cultivated with tomato and irrigated with wastewater. The experimental design was completely randomized in a factorial 6 × 2, totaling twelve treatments with three replications. The treatments were: four tannery sludge vermicompost (25% Sludge tannery(LC) + manure - T1, 25% Sludge tannery(LC) + rice husk -... Read more.
DOI: 10.5897/AJAR2016.11405[Article Number: B0F507961121]
Most of the population in developing countries still uses medicinal plants as the main source to meet their medical needs. Field experiments were carried out at tropical environment in Brazil in order to determine the main characteristics of ‘batata-de-purga’ (Operculina macrocarpa L. Urban), cultivated under 5 different levels of irrigation. The crop was cultivated with and without shading, using a plastic... Read more.
DOI: 10.5897/AJAR2016.11414[Article Number: BF066E261126]
The use of cover crops in intercropping is an important strategy for soil management and conservation, the improvement of edaphic conditions, and the optimization of cultivation of intercropped plants of commercial interest. The goal of the present study was to evaluate the water content and soil nutrient as well as initial growth of some fruit trees native to the Cerrado, Brazil. That is, Eugenia dysenterica Mart. ex... Read more.
DOI: 10.5897/AJAR2016.10981[Article Number: 9D440FC61131]
Commercial cattle farming in semi-arid regions is subject to high rainfall risk. At the same time, it is prone to rangeland degradation. Theoretical works suggest that rainfall risk management by means of financial instruments may stabilize farming-derived income over the short-term, but provides little incentives for conservative rangeland management. Thus, the use of financial strategies of income stabilization may... Read more.
DOI: 10.5897/AJAR2016.11220[Article Number: 96A1CCE61133]
Studies on morphology and occupancy area of trees provide knowledge on features and functions of forest ecosystem, especially in terms of competition and growth of trees. The main purpose of this work was to develop models for shape and size relationships of Araucaria angustifolia in natural forest remains of species. Dendrometric and morphometric variables from 210 trees from three sites were used. Results showed that... Read more.
DOI: 10.5897/AJAR2016.11557[Article Number: 58A578A61135]
In complex systems, small anthropogenic changes of the initial conditions could lead to profound changes in the entire system. In this sense, the present literature review has surveyed several studies related to the multiple uses of forest resources and sustainability in small and medium-sized farms in the tropics. In 1985, Food and Agriculture Organization of the United Nations (FAO) published a work addressing... Read more.
DOI: 10.5897/AJAR2016.11553[Article Number: AEFDBFF61136]
In this study, we analysed factors that influence crop output commercialisation among smallholder farmers in Cote d’Ivoire. Unlike previous studies, we correct for sample selection bias by using the Heckman maximum likelihood sample selection model with village fixed effects. We rely on a unique and detailed dataset that covers 3,393 smallholder farmers. The dataset was gathered from the 2014 National employment... Read more.
DOI: 10.5897/AJAR2016.11446[Article Number: F3800EE61139]
The effect of two rhizobacteria, Pantoea agglomerans and Bacillus subtilis on parasitism of the root-knot nematodes, Meloidogyne javanica on eggplants was evaluated in laboratory and greenhouse experiments. The impacts of the bacteria application as seed treatment, root dipping, and soil drench on early nematode penetration into plant roots, as well as, on eggplant growth were tested. The number of penetrated second... Read more.
DOI: 10.5897/AJAR2016.11581[Article Number: C6DF8FE61145]
This study aimed to establish a comparison for theoretical water demand between rice plants grown under flooding and under different levels of water stress, imposed at distinct crop stages, in terms of plant morpho-physiology and phenology. The experiment was installed in a greenhouse, using complete randomized design and factorial scheme 3 × 4 + 1, with four replications. Factor... Read more.
DOI: 10.5897/AJAR2016.11345[Article Number: 5BB381E61149]
The objective of this study was to assess the energy value of waste timber in the form of sawdust. Two types of wood: Araucaria (Araucaria angustifolia) and Pinus were evaluated with no defined species (Pinus sp). The sawdust was collected from a timber that receives wood from reforestation of these species in Southwestern Paraná, Brazil. The material collected was evaluated with a calorimeter bomb to determine... Read more.
DOI: 10.5897/AJAR2016.11393[Article Number: 5D3F6E860928]
Common bean is grown by smallholder farmers in Malawi who produce low yield due to drought constrains. Two experiments comprising of two different bean growth habits (IIa and IVa) were conducted at Chitedze Research Station in Malawi, to assess eleven common bean genotypes for yield and yield components under drought conditions. Drought reduced significantly number of pods plant-1, number of seeds pod-1 and consequently... Read more.
DOI: 10.5897/AJAR2016.11529[Article Number: 5B3EFF160930]
This study evaluated the forage yield and feed chemical composition of a Brachiaria decumbens natural pasture as undergrowth to a Myracrodruon urundeuva (aroeira) tree stand in a silvopasture system at UNESP/Ilha Solteira, Selvíria, Mato Grosso do Sul, Brazil. Sampling was conducted in a completely randomized block design with a factorial scheme of two plots and two sub-plots, with plots as the light... Read more.
DOI: 10.5897/AJAR2016.11320[Article Number: 89DE31160932]
The objective was to verify the influence of winter crops under management mechanical (roller knife) and chemical (glyphosate), on soil physical properties and yield of soybeans. The experiment was carried out at the field under randomized block design in tracks scheme. The treatments consisted of four different winter crops (oats IPR 126, wheat BRS Tarumãt crambe FMS Bright and forage radish cultivar common) in... Read more.
DOI: 10.5897/AJAR2016.11325[Article Number: 93FB9D260935]
Climatic changes have induced the spread of aridity in many parts of the globe. Eucalyptus plantations show wide variations in productivity due to several factors, including climatic changes. Therefore, Eucalyptus genotypes that can adapt to such conditions is very welcome. Thus, an evaluation was done by comparing the physiological responses of two Eucalyptus genotypes, tolerant and drought-sensitive. They were... Read more.
DOI: 10.5897/AJAR2016.11441[Article Number: 84FBC7A60937]
Planting and harvesting are important stages in the sugarcane crop cycle, because well planned planting and harvesting phases promote a series of benefits throughout the cultivation cycle and in the subsequent industrial use of the products. These benefits are operational, economic and environmental such as: improved utilization of the land area and transport logistics; an increase in sugarcane output; better cane... Read more.
DOI: 10.5897/AJAR2016.11349[Article Number: 4ED0CBF60939]
Agricultural spray adjuvants (ASA) are widely used in pesticide applications to enhance the effective control of pest, weed and disease. The aim of this research was to investigate the effects of ASA used in Brazil agriculture on surface tension reducing capacity and foliar spray retention on different Eucalyptus species. Static surface tension of adjuvants at concentrations of 0.001, 0.0025, 0.005, 0.01, 0.025, 0.05,... Read more.
DOI: 10.5897/AJAR2016.11603[Article Number: 5F7A4FC60943]
The growth of tree legumes in degraded areas must be preceded by assessments of nodulation ability of naturally established rhizobia populations since such information contributes to defining the species which can be planted for recovering disturbed areas. The aim of this study was to evaluate the growth and natural nodulation of “sabiá” (Mimosa caesalpiniifolia Benth.) and leucaena (Leucaena... Read more.
DOI: 10.5897/AJAR2016.10943[Article Number: 1AC2ACF60950]
Nitrogen fertilizer management modifies oat (Avena sativa) panicle components and its grain yield. The work aims to study the potential of the variables of oat (A. sativa) panicle with N-fertilizer, and to simulatate its grain yield using multiple linear regression in succession systems of high and reduced N-residual release. The study was done in 2013 and 2014. The experiment was done in a complete randomized block of... Read more.
Page 1 of 257, showing 20 records out of 5127 total, starting on record 1, ending on 20