Growth and yield of cashew in relation to foliar and soil nutrient levels
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Date
1992
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Department of Agronomy, College of Horticulture, Vellanikkara
Abstract
An experiment on the growth and yield of cashew in relation to foliar and soil nutrient levels was conducted during 1990-'92 by making use of seedling progenies of BLA-39-4 with three levels each of N (250, 500 and 1000 g /tree /year), P (125, 250 and 500 g P205 /tree /year) and K (250, 500 and 1000 g K2O /tree /year) and one absolute control (with out NPK application ).
Significant response in increasing height and number of flushes was observed only for N (500 g /tree /year) and P (250 g P205 /tree / year). Leaf N and K content at flushing , flowering and fruiting were enhanced by application on of a ll the three nutrients with maximum values at flowering . Leaf P content was enhanced by N, P and K application only at flushing and fruiting . N, P and K application also increased the chlorophyll ‘ b 1 and total chlorophyll.
There was increase In N and P content of soil by N, P and K application , while K content of s oil was increased only with higher levels of K.
2 The number of panicles/m and test weight of nuts and yield were increased by the application of N, P and K. A positive significant relationship was obtained between leaf N and P contents at flowering and fruiting stages and yield .
There was progressive increase in nut volume , protein content of kernels and fruit characters such as fruit weight, fruit volume and TSS of apple by N, P and K application .
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PG
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