Crop_Residue_Management_Presentation.pptx

Crop residue management

1. Management of Crop Residue for Enhancement of Crop Productivity and Nutrient Cycling Authors: Bipin Bihari, Ragini Kumari, Rajeev Padbhushan, Rajkishore Kumar, Gopal Kumar, Shailja Kumari, Mona Kumari Affiliation: Bihar Agricultural University, Sabour, Bhagalpur, Bihar, India

2. Introduction - Decline in agricultural growth and productivity - Shrinkage in cultivated area - Soil degradation and low levels of organic matter - Multi-nutrient deficiencies - Depletion of groundwater resources - Increased cost of production and low farm income - Environmental pollution

3. Importance of Crop Residue Management - Improves soil organic carbon and nitrogen content - Affects soil pH through CO2 and organic acid accumulation - Reclaims and manages saline and alkaline soil - Acts as a reservoir for plant nutrients - Decreases soil bulk density and increases porosity - Provides energy for microbial growth and activities

4. Production of Crop Residues in India - Annual generation: 500 Mt - Major contributors: Cereals (70%), Fibers, Oilseeds, Pulses, Sugarcane - Surplus residue available: 234 Mt

5. Nutrient Content in Crop Residues - Rice, Wheat, Maize, Pearl Millet, Potato Tuber, Groundnut Pods, Sugarcane - Key nutrients: N, P, K, S, Ca, Mg, Zn, Fe, Mn

6. State-wise Crop Residue Data - Residue generation, surplus, and burned residues for various states

7. Management Aspects for Crop Residues - Animal feed - Burning (partial/complete) - In-situ recycling - Mulching - Incorporation - Composting - Biofuel, electricity, gasification - Building material, paper

8. Factors Affecting Decomposition - Residue particle size - Environmental factors (temperature, moisture) - Management factors (placement of residue) - Nutrient availability (C:N ratio) - Soil properties (pH, texture)

9. Nutrient Cycling in Crop Residue-Amended Soil - Conceptual model of nutrient pathways

10. Effect of Crop Residue Management on Soil Properties - Bulk density, hydraulic conductivity, mean weight diameter, soil organic carbon - Results from experiments and studies

11. Conclusion - Sustainable crop production and ecological benefits of crop residue management - Long-term improvements in soil health, crop productivity, and environmental quality