to study the effect of different fertilization systems on forage quality and secondary metabolites ofmedicinal forage in additive intercropping of alfalfa and fennel an experiment was conducted as split plotbased on randomized complete block design with three replications at college of agriculture, shaheduniversity in tehran, 2011. the main plots were allocated to different levels biofertilizer...

introduction canola is the world third oil crop with 25 to 55 percent oil content (hezbavi & minaei, 2008). in recent years, tendency towards expansion of the acreage of canola in iran has been increasing and for the years 2010-2011 an area of 93000 ha with a total production of 190000 tons has been reported (ministry of jihad of agriculture, 2013). application of biological fertilizers which a...

introduction: increasing usage of chemical fertilizers imposes irreparable damages to the environment. disadvantages of chemical fertilizers has led to more attention to the application of organic fertilizers and manures. the use of organic fertilizers and livestock, especially in nutrient poor soils, it is necessary to maintain soil quality. plant growth promoting rhizobacteria (pgpr) occupy t...

background and objectives: soybean is one of the plants that need large amounts of nitrogen for grain yield production. todays bio-fertilizers are considered as a best replacement for chemical nitrogen to increase soil fertility and sustained agricultural production. meanwhile, the use of soybean symbiotic bacteria and nitroxin, which contain the most effective nitrogen-fixing bacteria of the g...

introduction given the importance of nitrogen for improving the quantitative and qualitative yield of crops (rodrigues et al., 2006) and the need for application of chemical fertilizers in intensive agriculture to get the maximum production, nitrogen supply in adequate amounts by ecologically avowed resources is known as one of the main challenges during transition from conventional to organic ...

due to importance of nitrogen on the agronomic traits of linseed oil, a factorial experiment was conducted in randomized complete block design with three replications at the field research station of faculty of agriculture at shahrekord university in 2012. five different treatments of fertilizer including urea, azomin, nitroxin, supernitroplus and control (without nitrogen) as the first factor ...