Dynamic Crop Planning for Enhancing the Crop Productivity Under Rainfed Conditions

A. K. Kotahri; Virendra Kumar; P. M. Jain; R. C. Purohi

doi:10.52151/jae2007443.1283

Authors

A. K. Kotahri Drylalld Farming Research Station, Post box 62, Bhilwara 311001 Author
Virendra Kumar College of Technology and Agricultural Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur 313001 Author
P. M. Jain Drylalld Farming Research Station, Post box 62, Bhilwara 311001 Author
R. C. Purohi College of Technology and Agricultural Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur 313001 Author

DOI:

https://doi.org/10.52151/jae2007443.1283

Abstract

Rainfall data of Bhilwara district in Rajasthan state for a period of45 years were analysed from two approaches viz.; 'Meteorological' approach and 'Onset of monsoon' approach. The results revealed considerable difference in rainfall characteristics with respect to length of growing period, water surplus/ deficit and probability of intervening dry spells due to these approaches. The 'Onset of monsoon' approach is more rational as it precisely describes the actual crop environment and provides information for varying onsets of monsoon as compared to 'Meteorological' approach. The results of water balance study revealed an increase of 142.6% in water deficit due to delay in onset (31 51 SMW) as compared to normal onset of monsoon (27th SMW), whereas an increase of 35.2% and decrease of 33.7% in water surplus was recorded due to late and early onset of monsoon. The correlation studies also reveal that onset of monsoon is inversely correlated (-0.91) with duration of rainy season while positively correlated (0.83) with water deficit. Thus, the 'onset of monsoon' approach should be considered for crop planning under rainfed regions to harness more profit per unit of rainfall.

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