efficient energy use in agriculture sector is one of the prerequisites to sustainable agriculture, because it allows financial savings, fossil resources preservation along with decreasing trend of air pollution. this research was conducted at the agricultural research field of zanjan university to determine the level of input energy in different tillage systems in forage maize production when i...

This study was carried out to investigate the yield response of 2 soybean (Glycine max (L.) Merrill) cultivars to different planting dates and plant populations and to examine the relationships of seed yield with leaf area index (LAI) and total dry matter (TDM) during the vegetative and reproductive periods for planting dates, plant populations, and cultivars. Two soybean cultivars, A3127 (earl...

faba bean is one of the proper crops for cultivation in guilan climate conditions in rotation with rice. one of the limiting factors in development of cultivating this plant is late maturity and synchronizing of its ripening with rice transplanting. to investigate the effect of planting date, timing and consumption rate of paraquat herbicide on the ripening, grain yield and some of the agronomi...

in order to determine the best planting date and seeding rate of two triticale genotype in mashhad climate condition on 2007-2009 growing season, an experiment was carried out, using a split-plot design based on randomized complete block design with three replication, at torogh agricultural research station, mashhad, iran. main plots devoted to five seeding dates and factorial combination of th...

a field study was conducted to determine the effects of planting method, density and nicosulforon on corn (ksc704) and weeds grown in corn at agricultural and natural resources research center of khorasan-razavi province, iran in 2009-2010 growing season. the treatments were: three planting methods (one row, two row and in-row), two planting density (75000 and 90000 plants/ha) and three doses o...

the crop simulation models are heuristic tools in order to determine optimal of management strategies and analyzing yield stability in agroecosystems. the objective of this study was to evaluate cropsyst model ability for simulating of development, growth and yield of wheat cultivars from golestan province in response to planting date. the results of model evaluation were acceptable so that, th...