Study of effect of planting date on vegetative traits,
reproductive traits and grain yield of soybean cultivars in
cold region of Ardabil (Iran)
Seyed Sajjad Moosavi1*, Seyed Mohammad Javad
Mirhadi1 Ali Akbar Imani2, Ali
Mohammadpour Khaneghah3 and Babak Shahmorad
of Agronomy, Science and Research Branch, Islamic Azad
University, Tehran, Iran.
of Agronomy and Breeding, Ardabil Branch, Islamic Azad
University, Ardabil, Iran.
Researchers Club, Ardabil Branch, Islamic Azad University,
*Corresponding author. E-mail:
Accepted 25 August, 2011
In order to study the effects of different planting dates on
the grain yield of soybean cultivars,
an experiment was conducted as factorial in the form of
randomized complete blocks design with three replications at
the research farm of Ardabil (Iran) in 2009.
In this experiment, the first factor
of sowing date included four levels (27 May, 5, 15
and 26 June) and the second factor
included cultivar Williams and line L17.
The results showed that there was not
meaningful difference between cultivars under study for all
traits, while there was meaningful difference between
different sowing dates for all traits being studied
except number of seeds per pod. Also,
the interaction of planting date and cultivar was not
meaningful for all traits under study.
Sowing dates of 27 May and 5 June
were placed in one group for number of pod in main bough,
height of each plant and a weight of 100 seed.
Also the mentioned traits had the
highest in the expressed sowing dates.
Sowing date of 27 May had the highest
amount for pods per sub-bough, number of nodes per
sub-bough, number of nodes in the main bough and the final
vegetative and reproductive