Author(s):

Pappu Khatik and LR Yadav

Abstract: A field experiment was conducted during winter seasons of 2015-16 and 2016-17 on loamy sand soil at Jobner to study the effect of different sowing environments and nitrogen levels on growth and yield of wheat (Triticum aestivum L.) varieties. The experiment comprising twenty four treatment combinations involving two sowing dates (20 November and 10 December), three varieties (Raj-4083, Raj-3777 and Raj-4037) and four levels of nitrogen (control, 40, 80 and 120 kg ha^-1) were laid out in split plot design with three replications. Crop sown on 20 November recorded significantly higher growth and yield as compared to 10 December sown crop. A reduction of 16.4 per cent in grain yield and 19.7 per cent in straw yield were recorded in 10 December sown crop over 20 November. Among the wheat varieties, Raj-4037 was fond to be best and recorded significantly higher grain yield (4458 kg ha^-1) and straw yield (5675 kg ha^-1) than Raj-4083 and Raj-3777. Variety Raj-4037 recorded significantly higher plant height, total number of tiller m^-1 row, dry matter accumulation/m row, LAI and chlorophyll content over Raj-4083 and Raj-3777. The growth parameters and available N, P, K content in soil after harvest were highest under 120 kg N ha^-1 which was significantly superior over control and 40 kg N ha^-1. With increase in nitrogen level upto 120 kg ha^-1, there was significantly increase in grain and straw yield but remained statistically at par with 80 kg N ha^-1.

DOI: 10.22271/phyto.2020.v9.i6l.13049

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