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The evaluation of supply parameter, a new index of zinc availability in Mollisols
Author(s) -
Srivastava P. C.,
Gangwar M. S.
Publication year - 1989
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19891520107
Subject(s) - zinc , mollisol , soil water , mathematics , environmental science , yield (engineering) , soil science , chemistry , materials science , metallurgy , organic chemistry
A new zinc supply parameter taking into account the intensity, quantity and buffering capacity and also the relative competitive influence of Cu 2+ , Fe 2+ , Mn 2+ on the availability of Zn 2+ has been tested. The proposed parameter correlated significantly and positively to Bray's per cent yield and zinc concentration in some parts of rice plant. The critical limit of soil zinc, in terms of this parameter at 15° and 30°C for rice, were 0.51 and 0.97 respectively. The required zinc addition to the deficient soil was also calculated on the basis of the values of this parameter at 30°C.