The optimum number of plants per unit area is an important parameter for getting higher seed yield with quality. Wider spacing due to less plant population and a close spacing due to competitive effect will result in poor yield. Nutrient management is considered to be also an important technology for increasing the productivity of crop plants. Application of nitrogen at the time of flowering leads to increase in seed yield and quality in most of the crops. Phosphorus and potassium favour root growth, fruiting and seed development. Therefore, the present study was conducted with main aim of making available information on optimum plant density per unit area and the nutritional requirement (i.e.) to fix optimum levels of N, P, K fertilizer application of individual seed crop. Significant variations were observed in most of the parameters especially in field emergence, Number of siliqua plant-1 and Seed yield due to fertilizer levels and spacing in both the years. Among the fertilizers F2 registered maximum yield and all the yield parameters. Similar results were obtained with spacing of S1. Finally from the study it was concluded that the application of 70:40:30 kg NPK ha-1 with the spacing of 30x30 cm was found optimum for realizing higher seed yield of 1272 and 1242 kg ha-1 during 2005 and 2006.
V. Vijaya Geetha, P. Balamurugan and K. Subrahmaniyan, 2011. Assessment of Population Dynamics and Mother Crop Nutrition on Seed Yield and Quality in Mustard CV.GM 2. American Journal of Plant Nutrition and Fertilization Technology, 1: 48-54.