EFFECT OF SPACING AND SOURCE OF NITROGEN FERTILIZERS ON GROWTH AND YIELD OF AFRICAN MARIGOLD DURING SUMMER IN ANDHRA PRADESH
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Authors
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D. APARNA*, M. L. N. REDDY, A. V. D. DORAJEERAO, V. V. BHASKAR, P. SUBBARAMAMMA and K. UMA KRISHNA
College of Horticulture, Dr Y.S.R. Horticultural University, West Godavari - 534 101
Keywords:
Ammonium sulphate; Calcium nitrate; Marigold summer cultivation; Spacing and UreaAbstract
The two-year research conducted on effect of spacing and source of nitrogen fertilizers on
plant growth and flower yield of African marigold cv. Bidhan Marigold-2 by inducing heat stress
tolerance during summer revealed that closer spacing of 45 cm x 30 cm, application of nitrogen in the
form of calcium nitrate and their interaction effect were found to be superior in terms of flower yield
ha-1 (165.959, 156.334, 183.511, respectively), whereas, for rest of the vegetative, flower and yield
parameters, maximum values were recorded at wider spacing of 60 cm x 30 cm, nitrogen in the form
of calcium nitrate and interaction effect of 60 cm x 30 cm + calcium nitrate followed by ammonium
sulphate and urea, whereas, in terms of Benefit- Cost Ratio, application of ammonium sulphate was
found to be superior followed by urea and calcium nitrate. The higher cost of calcium nitrate was non
compensative compared to ammonium sulphate pushing down the treatment combinations with calcium
nitrate.
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