Vol. 12, Issue 5 (2023)

Author(s):
Aditya V Machnoor, DS Gurjar, Rosin KG, K Shekhawat and AK Tiwari

Abstract:
A field experiment was conducted for estimation of crop water requirement, water use efficiency and economics of marigold (Tagetes patula L. cv. Pusa deep) under groundwater-wastewater irrigation regimes at Water Technology Centre farm of ICAR-Indian Agricultural Research Institute, New Delhi during period of 2020-21. Eight treatments T-1: Groundwater irrigation scheduled at 25% MAD (θv =27%); T-2: Groundwater irrigation scheduled at 50% MAD (θv=22.5%) T-3: Groundwater irrigation scheduled at 75% MAD (θv=18%); T4: Groundwater irrigation scheduled as per farmers practice/recommended POP; T-5: Wastewater irrigation scheduled at 25% MAD (θv= 27%); T-6: Wastewater irrigation scheduled at 50% MAD (θv= 22.5%); T-7: Wastewater irrigation scheduled at 50% MAD (θv=18%); T-8: Wastewater irrigation scheduled as per farmers practice/recommended POP were laid out in a randomized block design (RBD) with three replications. Results indicated that highest crop water requirement of marigold (647.04 mm) and lowest (434.42 mm) were found in the treatments where groundwater and wastewater irrigations scheduled at 75% MAD and 25% MAD, respectively. Maximum and minimum water use efficiency of marigold were observed as 7.05 kg/ha-mm and 4.27 kg/ha-mm under wastewater irrigations scheduled at 50% MAD and groundwater irrigations scheduled at 75% MAD, respectively. Highest and lowest economics in terms of benefit -cost ratio (BCR) of marigold was observed as 3.41 and 1.80 under wastewater irrigations scheduled at 50% MAD and groundwater irrigations scheduled at 25% MAD, respectively.