RESUMEN
The present investigation was carried out in Rabi (winter) season 2022-23 at Agronomy Research Farm of Chandra Bhanu Gupta Post Graduate College, Bakshi ka Talab, Lucknow (U.P). The treatments comprised of four nitrogen levels viz., 0, 15, 30 and 45 kg N ha-1 with four phosphorus levels viz., 0, 20, 40 and 60 kg P2O5 were tried in Factorial Randomized Block Design. The soil was silty-loam texture with slightly alkaline pH 8.1, organic carbon 0.70 %, available nitrogen 270.00 kg ha-1, available phosphorus 27.0 kg ha-1, and available potash 262.0 kg ha-1 during 2022- 2023. The rainfall received during the crop period was 0.00 and 0.02 mm, respectively. The relative humidity was recorded maximum during month of December study while, the sunshine ranged from 2.3 to 9.1 during crop period. Increasing levels of nitrogen and phosphorus significantly increased most of the growth and yield attributing characters viz., plant height, number of branches, dry matter accumulation and yield attributes viz., number of pods plant-1, number of grains pod-1, grain weight and test weight were significantly higher with 45 kg N ha-1 and 60 kg P2O5 ha-1 and superior to other doses of nitrogen and phosphorus. Yield studies viz., Grain yield, straw yield and biological yield were significantly higher with 45 kg N ha-1 and 60 kg P2O5 ha-1 and superior to other doses of nitrogen and phosphorus. The N and P content % and uptake increased with increasing levels of nitrogen and phosphorus. The highest nutrient content and uptake were recorded with 45 kg N ha-1 with 60 kg P2O5 ha-1. Economics analysis viz., gross return, net return and benefit cost ratio was recorded highest with 45 kg N ha-1 + 60 kg P2O5 while lowest with control. Thus for obtaining better yield and profit apply 45 kg N ha-1 in combination with 60 kg P2O5 ha-1 for lentil.
RESUMEN
An experiment was conducted at Shradhay Bhagwati Singh Agriculture Research Farm (Hajipur), Chandra Bhanu Gupta krishi Snatakottar Mahavidyalaya, B.K.T., Lucknow (Uttar Pradesh) during the rabi season of 2021-22. The experiment consisted of 12 treatment combinations comprised of 3 seed rates and 4 weed management practices, tested in factorial randomize block design with three replications. The results indicated that different seed rates and weed management practices significantly influenced the growth, yield and nutrient uptake of wheat. The soil of experimental site was silty loam soils having medium organic carbon (0.70%) and nitrogen (270 kg ha-1), phosphorus (27 kg ha-1) and potassium (262 kg ha-1). Crop sown with seed rate, S3 (120 kg ha-1) recorded highest plant height, number of tillers m-2, leaf area index, dry matter accumulation, number of effective tillers, grain yield, straw yield, biological yield and nutrient uptake. However, higher number of grains spike-1, grain weight spike-1, length of spike and test weight was recorded with crop sown with 100 kg ha-1 seed rate. Weed free upto 60 DAS (W1) resulted in significantly higher growth and yield attributes and yields over rest of the weed control treatment. Post emergence spray of Clodinafop + Metsulfuron (60 + 4) g ha-1 recorded significantly higher values of all growth, yield attributes and yield over sulfosulfuron @ 25g a.i ha-1. Weed free upto 60 DAS had highest weed control efficiency followed by Clodinafop + Metsulfuron 60 + 4 g ha-1 (49.78%). However, the highest weed index was noticed in weedy check and lowest with herbicide mixture. The highest net returns (Rs. 69036) and B:C (1.73) were obtained with combination of 120 kg seed rate ha-1 + Clodinafop+ Metsulfuron @ 60g ha-1 +4g ha-1 (PoE) at 30-35 DAS.