ROOT PARAMETERS AND NUTRIENT UPTAKE BY RAINFED MUSTARD AS INFLUENCED BY SOWING TIME AND MOISTURE CONSERVATION PRACTICES IN AN ALLUVIAL SOILBrij Kishor Sharma, K.S. Yadav, R.L. Rajput , Naresh Gupta and Narendra S. Gurjar
Field experiments was conducted at the research farm, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior during rabi (winter) seasons of 2010-11 and 2011-12 to study the sowing dates and moisture conservation practices (MCP) on root parameters and nutrient uptake by mustard (Cv. Pusabold). Three different sowing dates (i.e. 11, 21 & 31 October) were kept in the main plots and eight MCP including one hand weeding and mulching of paddy straw, grass & pearlmillet husk @ 2.5 & 5.0 t/ha were kept in subplots. In general, the value of root and yield contributing characters had higher value under early sowing. Highest seed yield (2380 kg/ha) was observed in 11th October sown crop followed by 21st October and both superior over 31st October. Maximum Oil content (41.40) and oil yield (986.1 kg/ha) were obtained with early sowing (11 October). The crop sown on 21st October gave higher total N, P, K and S uptake, being at par with 11th October and significantly superior over 31st October. Application of mulching @ 5.0 t/ha produced significantly higher seed yield over 2.5 t/ha at the same material. Whereas, different mulching materials (i.e. paddy straw, grass & pearlmillet husk) paddy straw gave significantly higher seed yield over other materials. Application of mulching with one weeding by khurpy at 20 DAS significantly increased the total uptake of N, P, K and S and oil content and its production in seed.
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