Madras Agricultural Journal
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Correcting zinc deficiency and manganese toxicity in rice soils by water management Techniques.

Abstract

Five acid rice soil types of Kerala marginally deficient in zinc (all the five) and high in manganese (only 3 types) were subjected to a study on the effect of dewatering and drying the soils to simulate field conditions and operations. Drying enhanced the available zinc status in all the soils, the level being much greater than the original status The change was only marginal and non-significant in respect of available. manganese. The results indicate that simple water management techniques like dewatering and aerating the soil at tillering phase corresponding to 20-30 days after planting, tako care of the zinc nutrition of the rice crop for a soil marginally deficient in zinc thus obviating the need of application of costly zinc sulphate.

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Tamil Nadu Agricultural University
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ISSN : 0024-9602
eISSN : 2582-5321

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