APPLICATION OF THE PENMAN-MONTEITH METHOD TO DETERMINE THE CROP WATER REQUIREMENTS

Agricultural production is critical to meeting Indonesia's food demands. The water catchment area of Parit Keladi 1, located in Desa Keladi, Kecamatan Sungai Kakap, Kabupaten Kubu Raya, Provinsi Kalimantan Barat, includes tidal swamp land that has a variety plants. Cropwat 8.0 Software will be used this research assess crop needs. This employs primary and secondary data, including soil samples, field cropping patterns, plant hydration levels.The type clay was silty, the pattern at study site paddy, height puddle on paddy 3 mm/day/ha, according findings data analysis sampling. maximum need for 5.90 mm/day/ha March period while lowest requirement 0 October 1. citrus 2.62 August 3, from December May June In September Period required 32.2 ten days; however, level mm/ha one day late September. Thus, estimate demands rice plants using Program valid.