in order to investigate the effects of boron, zinc and sulfur on yield and fatty acid composition of rapeseed(hyola 401 cultivar), an experiment was conducted in rasht province in 2011. a field experiment withcompletely randomized block design was performed with eight treatments in three replications.maximum grain yield (4157.6 kg ha-1) and grain oil (1770.2 kg ha-1) was obtained from s+b+zntre...

this study was undertaken to investigate the effect of long-term reduced tillage on grain yield, grain quality, and weed infestation of spring wheat. the experimental variables were three tillage systems: (a) conventional tillage (ct): shallow ploughing (10-12 cm) and harrowing after harvest of the previous crop, ploughing (25-30 cm) in the autumn; (b) reduced tillage (rt): only a cultivator (1...

optimum management of intra- and interspecific competitions are key subject in most agroecosystems. the objective of this experiment was the study effect of intra- and interspecific competitions and n rates on yield and yield components of wheat which was carried out in agricultural faculty of shahid chamran university of ahvaz during 2011-2012. the experimental design was split–plot based on r...

grain discoloration caused by fungi agents, in crop season that the mature grain stage coincides with rain, it causes many damages. in this research effect of paddy discoloration of three varieties (hashemi, gohar and khazar) and disease index in two levels (high and low disease index levels) on grain apparent quality, milling properties and grain bending strength was investigated in a factoria...

pre-harvest desiccation of rapeseed crop may allow a more timely harvest as well as increase the speed and harvest operation efficiency as a second crop after rice. an effective desiccant which could be used as a harvest-aid with no negative effects on rapeseed yield and quality would be advantageous for oil seed crop producers and may reduce yield losses with no interferential effects on rice ...

in order to study the effects of planting date and plant density on yield and its components in three chickpea (cicer arietinum l.) cultivars in rainfed conditions of ilam, a field experiment was carried out using split plot design as factorial by complete randomized block design with three replications at shirvan-chardavol agriculture research station during 2008-2009. sowing dates were assign...