Sharma, Sanjay K.Singh, Harmanpreet2019-01-232019-01-2324-07-18http://krishikosh.egranth.ac.in/handle/1/5810092065The present study was conducted at the experimental farm of Department of Soil Science, CSK HPKV, Palampur, during Rabi 2016-17 with the objective to evaluate the effects of different tillage methods, irrigation and potassium levels on soil moisture content, yield, nutrient uptake by wheat crop and soil properties. The treatments comprised two tillage methods viz. conventional and conservation tillage, two irrigation levels viz. no irrigation and two irrigations of 2.5 cm each at tillering and flowering stages only and three potassium levels viz.100 per cent, 125 per cent and 150 per cent recommended dose of potassium. These were evaluated in a split plot design. Wheat (var. HPW 236) was sown on 26th December, 2016. The results indicated that treatment in which conservation tillage was followed had early emergence, higher soil water content, plant height (77.2 cm), relative leaf water content, nutrients uptake, better yield attributes (spike length, number of grains per spike, number of effective tillers and 1000-grain weight) and grain (26.6 q ha-1) and straw yield (39.5 q ha-1) in comparison to the conventional tillage. Among the irrigation levels higher plant height (76.0 cm), relative water content, better yield attributes, nutrients uptake and grain (28.4 q ha-1) and straw yield (41.1 q ha-1) were recorded when crop was irrigated twice as compared to no irrigation. Higher plant height (76.6 cm), relative leaf water content, better yield attributes, grain (28.4 q ha-1) and straw yield (41.8 q ha-1) and nutrients uptake were recorded with application of 150 per cent recommended dose of potassium. The treatment comprising two irrigations coupled with application of 150 per cent recommended dose of potassium under conservation tillage recorded higher gross returns (Rs. 97106 ha-1), net return (Rs. 62860 ha-1) and B: C ratio (2.84). Soil pH, bulk density, available N and P were not affected by tillage methods, irrigation and potassium levels. Soil organic carbon increased significantly at surface layer under conservation tillage and available potassium increased significantly with increasing levels of potassium.enThesis