Conservation Agriculture Boosts Soil Quality and Productivity in India's Rice-Wheat Cropping System

Strategic Insights -

Research presented in the journal Scientific Reports found that long-term conservation agriculture (CA) can significantly enhance soil properties and quality in the rice-wheat cropping system of India's Indo-Gangetic plains (IGPs). The study, led by ICAR - Indian Agricultural Research Institute (IARI), examined the impact of CA durations on soil quality and found that adopting CA for more than 8 years can help restore soil health and sustain productivity.

Key Takeaways:

  • The study assessed the effects of CA practiced for 2, 4, 8, and 12 years on soil quality in the Nilokheri block of Haryana, India, compared to conventional tillage (CT).
  • CA8 and CA12 had 9.8-10.7% and 11.1-11.3% lower bulk density, respectively, compared to CT, indicating improved soil structure.
  • Mean weight diameter, saturated hydraulic conductivity, and water holding capacity were significantly higher in CA8 and CA12 over CT at both soil layers.
  • Microbial biomass carbon and dehydrogenase activity increased by 32% and 42.7% in CA8 and CA12 over CT, respectively, in the surface soil.
  • The study developed a soil quality index (SQI) using principal component analysis (PCA) for each scenario, which showed that CA12 had the highest SQI, followed by CA8 and CA4, and the lowest in CT.
  • The research highlights the potential of enhancing soil quality to boost agricultural productivity under CA, thereby fostering sustainable farming.
  • The study concluded that adopting CA for more than 8 years can help restore soil health and sustain productivity in the rice-wheat cropping system of northwest IGPs.

Statistics:

  • CA8 and CA12 had 9.8-10.7 and 11.1-11.3% lower bulk density, respectively, compared to CT.
  • Microbial biomass carbon increased by 32% in CA8 over CT, and 42.7% in CA12 over CT.
  • Saturated hydraulic conductivity increased by 25% in CA8 over CT, and 30% in CA12 over CT.
  • Water holding capacity increased by 20% in CA8 over CT, and 25% in CA12 over CT.

Sources:

  • Scientific Reports, 2025; 15(1): 28393.
  • Nature Portfolio, Heidelberger Platz 3, Berlin, 14197, Germany.
  • ICAR - Indian Agricultural Research Institute (IARI), New Delhi, 110012, India.
  • Long-term conservation agriculture to enhance soil properties and quality in rice-wheat cropping system.