Effect of sewage sludge from paper factory on some soil properties and rice yield in Roi-Et soil series
1991
Siangjeaw Piriyaprin | Pitayakon Limtong | Chaveevan Leaungvativiroj ( Land Development, Bangkok (Thailand). Soil and Water Conservation Div. Organic Matter and Waste product Sub-Div.)
Study effects of sludge from paper industry on changes in soil properties and rice yields (RD-15) in Roi-Et soil series was conducted at Agricultural Development Research Center in Northeast Thailand, Khon Kaeng Province. There were 3 rates of sludge as 5, 10 and 15 tons/rai. Sludge application trended to increase the organic matter and available potassium content and the value of electrical conductivity in the soil. The application of sludge at the more rate 5 ton/rai to the soil, had effect decreasing the rice growth rate and crop yield because of the appearance of anaerobic sludge decomposition process.
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Эту запись предоставил Kasetsart University