Effect of Different Nitrogen Levels on Performacne of Late Sown Wheat (Triticum aestivum L.) And Physico-Chemical Properties of Soil in Rice Wheat Cropoing System

Abstract

A field experiment was conducted during Rabi season 2013-14 at Crop Research Centre (Chirauri) of Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut (U.P.) to evaluate the "Effect of different nitrogen levels on performance of late sown wheat (Tri!icum aestivum L.) and physico-chemical properties of soil in rice-wheat cropping system". The area lie at a latitude of 29° 40' North and longitude of 77° 42' East with an elevation of 237 meters above mean sea level. The soil of the experimental field was well drained, sandy loam in texture (sand 52.3 %, silt 28.2 %, clay 19.5 o/o) and slightly alkaline in reaction (pH 8.23). It was low in available nitrogen and medium in available phosphorus and available potassium with an electrical conductivity 0.22 dS m-1 • The treatments comprised N, 0 control, N@ 20 kg ha-1, N@ 40 kg ha-1 , N@ 60 kg ha-1 , N@ 80 kg ha-1 , N@ 100 kg ha-\ N @ 120 kg ha-I, N @ 140 kg ha-1 , along with recommended dose of P and K in all the treatment, with four replication in a randomized block design. The data on growth, yield and their contributing traits were calculated on plot area basis ( 12 m2 ), whereas content and uptake of nutrients at various stages along \Vith available N, P, K and Zn were recorded as per the standard procedure. The experimental finding revealed that growth parameters (plant height and number of tillers) at 30, 60, 90 DAS and harvest stages, yield contributing traits, yields with viz., grain ( 42.68), straw (55.20) and biological yield (97.89), uptake ofN, P, K and Zn and available nitrogen at various stages were recorded significantly higher under application of 140 kg N ha-1 along with recommended P, K and Zn, which was at par with 120 kg N ha- 1• Lower above values was found in control over other treatments. Without application of nitrogen noted maxim urn pH and available P, K and Zn at various stages of wheat growth. The benefit cost ratio the treatment having 120 kg N ha-1 was more beneficial in comparison to other treatments. Therefore, application of 120 kg N together with P, K and Zn found superior to achieved higher yields and production economics in alluvial plain zone of Uttar Pradesh (India).