National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Investigations on the seasonal fluctuations in the uptake and status of the secondary nutrients (Ca, Mg and S) in both fruiting and non-fruiting terminals in cashew carried out during 2006 and 2007 in twelve plantations spread over the cashew growing districts of north coastal Andhra Pradesh revealed that the nutrient contents ranged from 0.216 to 1.532% (low to high), 0.132 to 0.226% (low to adequate) and 0.087 to 0.174% (low to high) with respect to Ca, Mg, and S, respectively. In both cases, the peak was observed during September to November, indicating depletion of the nutrients due to mobility to the developing fruits. Thereafter, there was a decline in leaf Ca content, possibly due to utilization by sinks of initiation and differentiation of flower buds. As regards Mg, the non-fruiting terminals in general recorded higher uptake during the same period and a declining trend was observed from May to July. There was increase in leaf S from July to January followed by a decline thereafter till March. Presumably, the greater nutrient concentration in both fruiting and non-fruiting terminals during the period of November to January coincided with the flower bud initiation and formative stage of the plant. Non-fruiting terminals showed higher nutrient contents in comparison to the fruiting terminals during all the months under study.
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