Evaluating Principles of 4R Nutrient Stewardship in the Rice-Maize-Green Gram Cropping System for Improved Productivity and Profitability of Farmers in Odisha

The current study was aimed at determining the 4R (right source, rate, time and place) guidelines in the rice-maize-greengram cropping system of Odisha. The soils of the experimental sites were loamy sand to sandy in texture, with acidic pH (4. 8 to 6. 9), low organic carbon (4. 4 to 7. 4 g/kg), low available N (155 to 190 kg/ha), low to high available P (8 to 64 kg/ha), low to high available K (30 to 140 kg/ha), low available S (8 to 12 kg/ha), low available B (0. 24 ppm) and low available Zn (0.

This study was aimed at developing nutrient management guidelines and evaluating 4R principles for the newly proposed rice-maize-green gram cropping system in Puri and Cuttack Districts of Odisha. The soils of the experimental sites were sandy to loamy sand in texture, with acidic soil reaction (pH 4. 8 to 6. 9), low organic carbon (4. 4 to 7.

Rice has been a traditional crop in the state of Odisha and is grown under rainfed lowland conditions, covering over 53% of the gross cropped area (8. 4 million ha) in the state. The cropping intensity in Odisha is quite low in comparison to the other states of India and most parts of the state do not grow any second crop following rice harvest. Crop intensification has immense prospects to overcome uncertainties in single-crop rice areas of Odisha.