HomeInternational Rice Research Notesvol. 22 no. 2 (1997)

Fertilizer Management on Two Contrasting Soil Types in the Rainfed Lowland Rice Production System in Cambodia

I Dubus | H Richard | P F. White | M Bolton

Discipline: Agriculture

 

Abstract:

We surveyed 25 farmers in 3 communes and 9 villages in the Svay Rieng District, 100 km southeast of Phnom Penh, during July 1994. Annual rainfall is about 1300 mm, mainly between May and October, with rice transplanted in July-August and harvested in December-January. The area contains "black" Alumisol (plinthaquult) and "sandy" cultural hydromorph (plinthustalf) soil types. Typical analysis of the sandy and black soils are, respectively: pH (water), 5.9, 5.1; organic C (%), 0.29, 1.09; total N (%), 0.03, 0.11; CEC (meq 100 g-1 soil), 1.3, 6.7; Olsen P (ppm), 0.4, 2.6; clay (%),6, 27; silt (%), 55,38; and sand (%), 38, 35.