Analysis of monthly rainfall to study planting time of paddy in swamp area

Abstract

Rainfall is one of the climate factors that strongly affect swampland paddy cultivation regarding its water conditions in the rainy season. The research aimed to identify the paddy planting time in freshwater and tidal swampland based on monthly rainfall. Rainfall data were obtained from Climate Hazards Center Infrared Precipitation with Stations data (CHIRPS) for 20 years (2000 to 2019). Planting area and planting time data were collected from field surveys through interviews with local farmers and agricultural extension agents. This study has conducted a descriptive analysis of harvest area data and annual rainfall rate. The Result showed paddy cultivation in freshwater affected by land typology and monthly rainfall. Planting time of paddy in shallow swamp begin in March or April. In the medium swamp area, planting time starts in June. While planting time in the deep swamp starts in August. In the tidal swamp, paddy cultivation for type C was more affected by rainfall. Local farmers in freshwater swamp plant paddy once a year, while in the tidal swamp, farmer can cultivate crop twice a year, namely paddy and corn.