Reference :1

Anonymous, 2017. Annual review of fertilizer production and consumption 2016-17, executive summary, Indian Journal of Fertilizers, October 2017, 97–99. Available from: http://www.faidelhi.org/general/Executive%20summary.pdf. Assessed on 29^th June, 2017.

Chatterjee, S., Sanyal, S.K., 2007. Site-specific potassium management for rice grown in selected alluvial soils of west Bengal. Better Crops India, 22–25.

EI-Hamdi, Kh.H., Ghanem, S.A., Hashem, I.M., 2010. Availability and uptake of nitrogen and potassium as affected by inorganic fertilizers in flooded rice soils. Journal of Soil Science and Agricultural Engineering Mansoura University 1(5), 433–451.

FAI, 2016. Fertilizer statistics, the fertilizer association of India, New Delhi (59^th Eds.).

Gomez, K.A., Gomez, A.A., 1984. Statistical procedures for agricultural research (2^nd ed). John Wiley and Sons, New York.

Gurav, P.P., Ray, S.K., Choudhari, P.L., Biswas, A.K., Shirale, A.O., 2018.  A review on soil potassium scenario in vertisols of India. Open Access Journal of Science2(1), 89–90. DOI: 10.15406/oajs.2018.02.00051.

Hanway, J.J., Heidel, H., 1952. Soil analysis methods as used in Iowa State College Soil Testing Laboratory. Bulletin 57, Iowa State College of Agriculture, Iowa, USA, 131.

Lindsay, W.L., Norvell, W.A., 1978. Development of DTPA soil test for zinc, iron, manganese and copper. Soil Science Society of America Journal 42, 421–428.

Longkumer, L.T., Singh, P.L., 2013. Response of rice (Oryza sativa L.) to sowing dates, nutrient and weed management. International Journal of Bio-resource and Stress Management 4(4), 523–528

Muzumdar, S.P., Kundu, D.K., Ghosh, D., Saha, A.R., Majumdar, B., Ghorai, A.K., 2014. Effect of long-term application of inorganic fertilizers and organic manure on yield, potassium uptake and distribution of potassium fractions in the new Gangetic alluvial soil under jute-rice-wheat cropping system. International Journal of Agriculture and Food Science Technology5(4), 297–306.

Olsen, R., Cole, C.V., Watanabe, F.S., Dean, L.A., 1954. Estimation of available phosphorus in soils by extraction with sodium bicarbonate. Circular-939 United States Department of Agriculture, Washington DC, USA.

Panaullah, G.M., Timsina, J., Saleque, M.A., Ishaque, M., Pathan, A.B.M.B.U., Connor, D.J., Saha, P.K., Quayyum, M.A., Humphreys, E., Meisner, C.A., 2006. Nutrient uptake and apparent balances for rice-wheat sequences. III. Potassium. Journal of Plant Nutrition 29, 173–187.

Prasad, R., 2012. Fertilizers and manures. Current Science 102(6), 894–898.

Sarkar, Md.I.U., Islam, Md.N., Jahan, A., Islam, A., Biswas, J.C., 2017. Rice straw as a source of potassium for wetland rice cultivation. Geology Ecology and Landscapes 1(3), 184–189.

Senapati, H.K., Dash, A.K., Santra, G.H., Mohanty, B., 2009. Potassium nutrition of rice as influenced by long-term use of fertilizers in Inceptisol. An Asian Journal of Soil Science 4(1), 149–153.

Sharma, S.K., Sharma, S.N., 2002. Balance sheet of nitrogen, phosphorus and potassium under different rice (Oryza sativa L.)-based cropping systems. Indian Journal of Agronomy 47(1), 6–11.

Shivay, Y.S., Prasad, R., Singh R.K., Pal, M., 2015. Relative efficiency of zinc-coated urea and soil and foliar application of zinc sulphate on yield, nitrogen, phosphorus, potassium, zinc and iron biofortification in grains and uptake by basmati rice (Oryza sativa L.). Journal of Agricultural Science7(2), 161–173.

Singh, A., Shivay, Y.S., 2014. Enhancement of growth parameters and productivity of Basmati rice through summer green manuring and zinc fertilization. International Journal of Bio-resource and Stress Management 5(4), 486–494.

Singh, B., Singh, Y.V., Imas, P., Chang, X.J., 2004. Potassium nutrition of rice-wheat cropping system. Advances in Agronomy 81, 203–259.

Subbiah, B.V., Asija, G.L., 1956. A rapid procedure for the estimation of available nitrogen in soils. Current Science 25, 259–260.

Syed, T., Anwar, B.M., Ashaq, H., Ganai Manzoor, A., Teli, N.A., 2016. Effect of levels and sources of zinc on growth, yield and economics of rice (Oryza sativa) under temperate conditions. Indian Journal of Agronomy 61(2), 186–190.

Tandon, H.L.S., 2007. Soil nutrient balance sheets in India: Importance, status, issues, and concerns.Better Crops, India, 15–19.

Tandon, H.L.S., 2013. Nutrient in soils, plants, waters, fertilizers and organic manures. In: Methods of analysis of soils, plants, waters, fertilizers and organic manures (Tandon, H.L.S., Edn.). Fertilizer Development and Consultation Organization, New Delhi. India, 204+xii.

Tandon, H.L.S., Sakhon, G.S., 1988. Potassium research and agricultural production in India. Fertilizer Development and Consultation Organization, New Delhi, 144.

Walkley, A.J., Black, I.A., 1934. An examination of the Degtjareff method for determination of soil organic matter and a proposed modification of the chromic acid titration method. Soil Science 37, 29–38.

Xie, W.X., Wang, G.H., Zhang, Q., Guo, H., 2007. Effect of nitrogen fertilizer strategies on nitrogen use efficiency in physiology, recovery and agronomy and redistribution of dry matter accumulation and nitrogen accumulation in two rice cultivars in Zhejiang, China. Journal of Zhejiang University Science B8(3), 208–216.

Yadav, R.L., Singh R.S., Prasad, K., Dwivedi, B.S., Batta, R.K., Singh, A.K., Patil, N.G., Chaudhary, S.K., 2000. Management of irrigated ecosystem. In: Natural resource management for agricultural production in India (Yadav, J.S.P., Singh, G.B., Eds.) Indian society of Soil science, New Delhi, India, 775–870.

Zhang, H., Xu, M., Shi, X., Li, Z., Huang, Q., Wang, X., 2010. Rice yield, potassium uptake and apparent banance under long-term fertilization in  rice-based cropping systems in southern China. Nutrient Cycling in Agroecosystems 88(3), 341–349.