A field experiment was conducted to investigate the effect of irrigation levels using drip irrigation system for Lettuce crop grown under polyhouse and in open field condition during winter season (November-February) for two consecutive years (2014-15 and 2015- 16) at the Experimental Farm area of Precision Farming Development Centre Project, Indian Institute of Technology, Kharagpur, India. Reference evapotranspiration was estimated using FAO-56 Penman Monteith approach. |
