Abstract
Fertilizers are a powerful control instrument for plant products. For more objective estimation of the role of fertilizers in development and crop formation of mustard (Brassica juncea), it is necessary to have data on rates and character of absorption of nutrients. The maintenance and as the sizes of receipt of nitrogen, phosphorus and potassium culture crops depended on their features and nutrient conditions. The experiment was conducted during the 2008-2009 (2009), 2009-2010 (2010) and 2010-2011 (2011) growing seasons on a meadow chestnut soil at the experimental station "Agrouniversity" of the Kazakh National Agrarian University of Almaty in Kazakhstan to evaluate the effect of mineral and organicfertilizers, their combination on nutrient uptake, yield and oil content of mustard (Brassica juncea) in short crop rotations (three year rotations). Fertilizers rate had a significant effect on N, P, and K at all vegetation stages. It has been established that annual application of N75P50К45 mineral fertilizers or 30 Mg/ha of cow dung a time in three year is necessary to get the seed yield 2.32 and 2.18 Mg/ha. With fertilization, the product quality enhances, i.e. crude oil content, which maximum quantity was recorded in case of manure and vermicompost treatments.