Vol. 10, Issue 6 (2021)

Author(s):
Amit Biswas, Subhrajyoti Chatterjee, M Viswanath, Anindita Roy and Suprajit Roy

Abstract:
A farm level research study was conducted with two different potato cultivars (i.e. Ashoka and Jyoti) at research farm of Bidhan Chandra Krishi Vishwavidyalaya during the period of November-March to assess the impact of different irrigation frequencies on consumptive water footprints (CWF) and crop water use efficiency (CWUE) of those varieties. The total experiment was conducted under two different planting dates (20^th and 29^th November) during the above period. The soil was sandy-loam with medium land situation. The plot size was 4.5 m × 3.7 m. The maximum yield recorded under 20^th November was 50.56 t ha^-1 and under 29^th November was 63.65 t ha^-1. Irrespective of irrigation level and cultivar, the highest average seasonal CWF was estimated at 37.43 m³ t^-1under 2^nd planting date (29^th November); whereas, the first planting date exhibited 11% lower CWF. But, the CWUE was found to be maximum (41.10 kg m^-3) under 1^st planting date; whereas, the second planting date presented about 7% lower WUE. Hence, the study recommended early planting of potato at the study region to obtain better CWUE with comparatively lower CWF.