Madras Agricultural Journal
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Effect of Intensive Cultivation of High Yielding Rice Varieties on Soil Properties. I. Physical

Abstract

To study the status of organic matter and its role on the physical properties of soil under intensive cultivation of paddy, a field trial was conducted. Paddy was culti vated in the sequence of IR 8 IR 8 in 1972-73, Karuna-IR 20 in 1973-74 and Co 36 IR 20 in 1974-75 following all the package of practices. Fertilizer at 185-85- 85 kg of NPK/ha was applied with a basal dressing of 25 tonnes compost. The study revealed increase of organic matter content which resulted in decrease of bulk density and improvement of water-holding capacity and porespace.

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