Field experiments were conducted at M/s Sun Paper Mill Farms, Cheranmahadevi during Kar and Pishanam seasons, 1995-96. The treatments included three different irrigation sources and three soil amendments with rice ASD36 as test crop. Soils irrigated with paper mill waste water increased the pH and EC in both the seasons. Gypsum was better in lowering plf than rice husk ash whereas for EC the rice husk ash proved better. DTPA extractable Zn, Cu, Fe and Mn largely accumulated in the upper 15 cm soil depth and the extent of their accumulation was increased with increased time of application. Application of rice husk ash proved significant in preventing the micronutrients from reaching toxic levels in soils.
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