Philippine Rice Research Institute(PhilRice)

October 27, 2023 Dear JAY PECASALES, Greetings! Thank you for your request dated Oct 25, 2023 09:24:09 PM under Executive Order No. 2 (s. 2016) on Freedom of Information in the Executive Branch. Your Request You asked for The water requirement of rice crop. Response to Request Your FOI request is approved. Our Rice Eng'g division/experts provided you the following data/information: Rice is typically grown in bunded fields that are continuously flooded up to 7−10 days before harvest. Continuous flooding helps ensure sufficient water and control weeds. Lowland rice requires a lot of water. On average, it takes 1,432 liters of water to produce 1 kg of rice in an irrigated lowland production system. Total seasonal water input to rice fields varies from as little as 400 mm in heavy clay soils with shallow groundwater tables to more than 2000 mm in coarse-textured (sandy or loamy) soils with deep groundwater tables. (Source Rice Knowledge Bank) The estimated values of crop coefficient for rice at the four crop growth stages (initial, crop development, reproductive and maturity) were 1.15, 1.23, 1.14 and 1.02 and corresponding Kc values for sunflower were 0.52, 1.1, 1.32 and 0.41. For other references for evapotranspiration, you may visit the following links: https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1604&context=biosysengfacpub Your right to request a review If you are unhappy with this response to your FOI request, you may ask us to carry out an internal review of the response by writing to Ms. Sophia T. Borja with email address: [email protected]. Your review request should explain why you are dissatisfied with this response, and should be made within 15 calendar days from the date when you received this letter. We will complete the review and tell you the result within 30 calendar days from the date when we receive your review request. If you are not satisfied with the result of the review, you then have the right to appeal to the Office of the President under Administrative Order No. 22 (s. 2011). Thank you. Respectfully, FOI Decision Maker PhilRice FOI Receiving Officer