Anonymous (2014) Statistical Abstract Meghalaya. Directorate of Economics and Meghalaya, Shillong.
Bray RH, Kurtz LT (1945) Determination of total, organic and available forms of phosphorus in soils. Soil Science 59:39-46.
Chesnin L, Yien CH (1951) Turbidimetric determination of available sulfates. Soil Science Society of America Journal 15:149-151.
Fisher PA (1958) Statistical Methods of Research Workers. Oliver and Boyd, London.
Fohse D, Claassen N, Jungk A (1991) Phosphorus efficiency of plants. Significance of root radius, root hairs and cation-anion balance for phosphorus influx in seven plant species. Plant and Soil 132:261-272.
Jackson ML (1973) Soil Chemical Analysis. Prentices Hall of India Pvt. Ltd., New Delhi, pp: 186-192.
Knudsen D, Paterson GA, Pratt PF (1982) Lithium, sodium and potassium. In: Page AL, Miller RH, Keeney DR (Eds.) Methods of Soil Analysis. Part II, 2nd edn. Madison, Wisconsin, pp. 225-246.
Lindsay WL, Norvell WA (1978) Development of a DTPA Soil Test for Zinc, Iron, Manganese, and Copper. Soil Science Society of America Journal 42:421-428.
Mir MR, Mobin M, Khan NA, Bhat MA, Lone NA, Bhat KA, Razvi SM, Wani SA, Wani N, Akhter S, Rashid S, Masoodi NH, Payne WA (2010) Effect of fertilizers on yield characteristics of mustard (Brassica juncea L. Czern and Coss). Journal of Phytology 2: 20-24.
Olmstead, LB, Alexander LT, Middleton HE (1930) A Pipette method of mechanical analysis of soils based on Improved Dispersion Procedure. United States Department of Agriculture, Washington, D.C., Pp.3-18.
Parcell J, Kojima Y, Roach A, Cain W (2018) Global Edible Vegetable Oil Market Trends. Biomedical Journal of Science and Technology Research 2:1-10.
Patel MS, Zalawadia NM, Sutaria GS, Patel AG (1992) Response of groundnut to phosphorus and its critical limits in vertisol of Surastra. Journal of Indian Society of Soil Science 40:97-100.
Piper CS (1966) Soil and Plant Analysis. Hans Publishers, Bombay.
Prabhuraj OK, Badigar MK, Manure GR (1993) Growth and yield of sunflower as influenced by levels of P, S and Zn. Indian Journal of Agronomy 38:427-430.
Prasad R (2013) Field Crops Production, Commercial Crops, V-II, Indian Council of Agricultural Research, New Delhi, p: 80-118.
Ryden JE, Pratt PF (1980) Phosphorus removal from wastewater applied to land. Hilgardia. 48:1-36.
Schultz E, Sutter TD, Sharma L, Endres G, Ashley R, Bu H, Markell S, Kraklau A, Franzen D (2018) Response of Sunflower to Nitrogen and Phosphorus in North Dakota. Agronomy Journal 110:685–695.
Sharma PD, Baruah TC, Maji AK, Patiram (2006) Management of acid soils of NEH Region. Indian Council of Agricultural Research, Krishi Anusandhan Bhavan, Pusa Campus, New Delhi, Pp: 45-60.
Singh AK, Bordoloi LJ, Kumar, M, Hazarika S, Parmar B (2014) Land use impact on soil quality in eastern Himalayan region of India. Environment Monitoring and Assessment 186:2013–2024.
Singh B, Bishnoi SR (1994) Response of sunflower to phosphorus application of soils differing in available phosphorus status. Journal of Indian Society of Soil Science 42:331-332.
Singh R, Sharma RK, Singh M (1997) Studies on soil P and response of sunflower to applied P on some soils of Haryana. Journal of Indian Society of Soil Science 45:301-305.
Singh R, Singh M (1983) Critical limits of available P for bajra and barley in Sierozem soils of Haryana. Journal of Research of Haryana Agricultural University 13:238-244.
Subbiah BV, Asija GL (1956) A rapid procedure for the estimation of available nitrogen in soils. Current Science 25:259-260.
Tyagi MK, Rana NS (1992) Response of mustard cultivars to phosphorus. Indian Journal of Agronomy 37:841-842.
Walkley A, Black IA (1934) An examination of the method for determining soil organic matter and a proposed modification of the chromic acid titration method. Soil Science 37:29-38.
Waugh DL, Cate RB Jr, Nelson LA (1973) Discontinuous model for rapid correlation, interpretation and utilization of soil analysis and fertilizer response data. Tech. Bull. No. 7, ISFEI Series, North Carolina State University, Releigh, W.C.
Yadav GS, Datta M, Babu S, Saha P, Singh R (2015) Effect of sources and levels of phosphorus on productivity, economics, nutrient acquisition and phosphorus-use efficiency of groundnut (Arachis hypogaea) under hilly ecosystems of North-East India. Indian Journal of Agronomy 60:307-311.
Yousaf M, Li J, Lu J, Ren T, Cong R, Fahad S, Li X (2017) Effects of fertilization on crop production and nutrient-supplying capacity under rice-oilseed rape rotation system, Scientific Reports 7:1270.