Investigating the release of phosphorus from rock phosphate pretreated with humic acid, farm yard manure and effective microbes
Barbers SA. 1995. Soil Nutrient Bioavailability: a mechanistic approach. John Wiley and Sons, Fertilizers Development and Consultation. New York Bio-fertilizers 36–51 p.
Basak RK, Deg GK. 1997. Release of phosphorus from partially acidulated rock phosphate in a Typic Ustifluvent. Journal of Indian Society of Soil Science 4, 759-762.
Chalk PM, Zapata F, Keerthisinghe G. 2002. Towards integrated soil, water and nutrient management in cropping systems: the role of nuclear techniques. In IUSS, (ed.). Soil Sci: confronting new realities in the 21st century. Transactions. 17th World Congress of Soil Science, Bangkok 2164-2164 p.
FAO. 1995. Integrated plant nutrient systems In R. Dudal and R. N. Roy (E.d) Fertilizer and Plant Nutrition Bulletin No. 12. Rome.
Laskar BK, Debnath NK, Basak RK. 1990. Phosphorus availability and transformation from Massoorie rock phosphate in acid soils. Environment and Ecology 8, 612-616.
Majumdar B, Venkatesh MS, Kumar K., Patiram SK. 2007 Effect of rock phosphate, superphosphate and their mixtures with FYM on soybean and soil-P pools in a typic hapludalf of Meghalaya. Journal of the Indian Society of Soil Science 55(2), 167-174.
Marshner H. 1993. Mineral Nutrition of higher plant London, Academic press Ltd, (Harcourt Brace and Co publisher). Zimbabwe Journal of Agricultural Research 25, 45-50.
NFDCb. 1989. The estimate of fertilizer demand and import requirements. Publication Series 3/89, Islamabad record no. 5831.
Tomayo VA, Munoz AR, Diaz AC. 1997. Organic fertilizer application to maiz (zea mays L.) on alluvial soil in a moderate climate. Actualidades-Corpoica. No. 108, 19-24.