Laboratory of Soil Science, Division of Soil Science and Plant Pruduction, Department of Plant Resources, Faculty of Agriculture, Kyushu University
九州大学農学部土壌学
Rainfall data recorded at IPSA/BSMRAU Meteorological Station, Salna, Gazipur, Bangladesh, for 13 years from 1988 to 2000 was evaluated. The stable but decreasing tendency of annual rainfall was indicated. The decreasing tendency was most conspicuous for October and February. This is alarming from the viewpoint of crop production. Decrease in October rainfall makes rabi cropping difficult in the rainfed condition, because rainfed cultivation of unplaned rabi crops is performed by utilizing soil water stored in the monsoon season. December and January are already in small rainfall, and decrease in February rainfall brings about condition of essentially no rainfall in consecutive 3 months. It may make cropping more risky in the rabi season. Re-examination of the present results is desired by using rainfall data recorded at other meteorological stations.