Long term effect of fertilization on rice (Oryza sativa) yield, nutrient uptake, economics and soil fertility under 25 years old rice-rice cropping system in vertisol of Tamil Nadu


Sharmila Rahale C*

Assistant Professor (SS&AC)

Department of Nano Science & Technology, Tamil Nadu Agricultural University, Coimabtore-3. Tamil Nadu, India

*Corresponding author email: sharmicj@yahoo.com 

Received: 12th March 2019; Accepted: 10th June 2019


The continuous use of fertilizers on yield, nutrient uptake, economics and soil fertility was studied under 25 years old rice-rice cropping system in Vertisol of sub tropical India. Significant increase in grain and straw yield and nutrients (N,P and K) uptake in grain and straw was observed in Integrated Nutrient Management (INM) practices. A strong negative correlation occurred between organic carbon and sand and bulk density of soil. Correlation between organic carbon and silt, clay, pore space, infiltration rate and water holding capacity are significantly positive. The INM treatment recorded higher yield resulting in higher economic returns, additional net income and benefit: cost ratio. Application of RDF with organic manures in rice is socially acceptable, economically viable and environmentally sustainable way of nutrient application which helps in sustainable crop production, greater profit and maintaining soil quality.

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