Journal of FARM SCIENCES, Vol 27, No 1 (2014)

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Influence of graded doses of nitrogen on nutrient uptake and grain yield of maize (Zea mays) under varying levels of soil salinity

Rajesh Rawal, V.B. Kuligod

Abstract


A field experiment was conducted in a farmer’s field in Roogi village of Mudhol taluk during Kharif 2012. The experiment comprised of four salinity levels (ECe <2, 2-4, 4-6 and 6-8 dSm-1) and four nitrogen levels (150, 175, 200 and 225 kg N ha-1). Application of higher doses of nitrogen resulted in increased yield. The highest maize grain yield of 8.31 t ha-1 was obtained under salinity level < 2 dSm-1. Soil application of 225 kg N ha-1 recorded maximum yield (6.74 t ha-1) and it was closely followed by 200 kg N ha-1. Increased doses of N application under saline soil condition did not benefit the crop and yield remained lower. Reduced NPK uptake was recorded with the increased soil salinity. The maximum NPK uptake was observed for 225 kg ha-1 N application irrespective soil salinity level and it was closely followed by 200 kg N ha-1.

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