Madras Agricultural Journal
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CRITICAL LEVEL OF ZINC IN SEMIARID SOILS OF COIMBATORE DISTRICT AND MAIZE PLANT

Abstract

A greenhouse experiment results showed that Zn fertilisation at 5 ppm Zn was found to be effective in increasing the total dry matter production of maize crop. Evaluation of soil tests for available Zn with six extractants showed that 1.00 ppm of DTPA extractable Zn can be used as a critical level for Zn in soils for delineating the soils of Coimbatore district. The DTPA method has significant correlation not only with Bray's per cent yield but also with actual yield, Zn content in leavs, and Zn content in leaf sheath and stem. Diagnostic criteria for Zn in plant revealed that 21 ppm Zn can be used as critical level for Zn in leaf of seven weeks old well established maize plant

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Madras Agricultural Students Union
Tamil Nadu Agricultural University
Coimbatore - 641 003
Tamil Nadu, India.

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Madras Agricultural Students Union
Tamil Nadu Agricultural University
Coimbatore - 641 003
Tamil Nadu, India.

ISSN : 0024-9602
eISSN : 2582-5321

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