Potassium mining from soil and paddy straw burning are the major issues leading un-sustainability of the rice-wheat cropping system. Paddy straw incorporation, soil application and foliar feeding of K affect the growth and productivity of wheat. Therefore a field experiment was conducted for 2 years in wheat with eleven treatments viz. control (without soil K application and without paddy straw incorporation (K0PS0)), without soil K with 8 t ha-1 paddy straw incorporation (K0PS8), 25 kg K ha-1 soil application without paddy straw (K25PS0), K0PS8 plus 2 spray of 2% KCl at tillering and booting (K0PS8+KClTB), 12 kg K ha-1 with paddy straw (K12PS8), K12PS+KClTB, 18 kg K ha-1 with paddy straw (K18PS8), K18PS8+KClTB, 25 kg K ha-1 with paddy straw (K25PS8), K25PS8+KClTB, 35 kg K ha-1 with paddy straw (K35PS8). Results revealed that during both years, tillering to booting, booting to heading and anthesis to maturity duration, evapotranspiration, apparent water productivity, water use efficiency and grain K content of wheat were significantly increased with K25PS0, K12PS8, K18PS8, K25PS8, K35PS8, K12PS8+KClTB, K18PS8+KClTB, K25PS8+KClTB, K35PS8 compared to K0PS0. These parameters were at par in K25PS8 +KClTB, K35PS8, K25PS8 and K18PS8 +KClTB but significantly higher than K0PS0, K0PS8, K0PS8+KClTB and K12PS8. However these parameters were at par in K0PS8, K0PS8+KClTB, K12PS and K12PS8+KClTB during both years but significantly higher than control. The improvement in phonological stages with itegration paddy straw incorporation, soil and foliar K application increased the water use which enhanced K concentration of grains resulting higher grain yield of wheat.