The field trial was carried out to find out at Horticultural Research Station, Bidhan Chandra Krishi Viswavidyalaya, Mondouri, Nadia, West Bengal during 2012-13 and 2013-14 to evaluate the response of different levels of soil application of potassium and recommended dose of nitrogen and phosphorous along with nitrogen 2% foliar spray once and twice and their interactions on plant nutrient content and soil fertility status after harvest. The design of the experiment was two factorial R.B.D with 8 treatments and three replications. The treatments consisted of four levels of potassium (K2O @ 80, 120, 160, and 200 kg/ha) and two spray schedules of N @ 2% as a foliar spray of urea to know the role of potassium and nitrogen on plant nutrient content and soil fertility status after harvest. The plant analysis of the leaves of turmeric showed improvement in leaf N, P, and K concentration with the application of potassium and nitrogen. The N, P, and K content were comparatively highest in K2O @ 200kg/ha + N @ 2% double spray, followed by the sole application of potassium (K2O @ 200kg/ha). The soil analysis after harvest of turmeric indicated better building of soil nutrient status i.e, N, P, and K with the application of potassium and nitrogen. The soil pH (7.07%), organic carbon (0.83%), nitrogen (269.69 kg/ha), potassium (315.11 kg/ha) and water holding capacity (56.10%) was recorded maximum with application of K2O @ 200kg/ha + N @ 2% double spray. The phosphorous content of the soil was however recorded maximum with K2O @ 160kg/ha + N @ 2% double spray (56.44%), however application of K2O @ 80kg/ha + N @ 2% single spray showed minimum soil nitrogen, phosphorous and potassium concentration. It appears from the results that application of K2O @ 200kg/ha + N @ 2% double spray proved most effective.