Growth and yield response of cowpea to different planting distances and farm manures
1987
Bucag, M.T. (Isabela State Univ., Cabagan, Isabela (Philippines))
A 4 x 5 factorial experiment in a randomized complete block design was used to determine the effect of distance of planting and farm manure in combination with commercial fertilizer and their interaction on the growth and yield of cowpea and to determine the economic returns in the maximal utilization of farm manure in order to provide a basis for gradual shifting to organic farming. Twenty treatment combinations with three replications were used (4 different planting distances namely: 70 x 20 cm; 70 x 30 cm; 70 x 40 cm; 70 x 50 cm; and 4 different farm manures plus an equal amount of ammonium sulfate (45 kg N/ha): 2,064 kg chicken dung/ha; 4,327 kg hog manure/ha; 5,489 kg cattle manure/ha; and 9,000 kg horse manure/ha and control (no fertilizer). The highest rate of growth (16.27 cm) was obtained from plants spaced 70 x 20 cm with chicken dung. Plants spaced 70 x 30 cm fertilized with chicken dung produced the highest number of pods (3.35 pods/plant). On the other hand, most number of seeds per pods (14.25) were taken from plants spaced 70 x 50 cm applied with chicken dung. Meanwhile, the heaviest seeds (14.93 g/100 seeds) were noted from plants spaced 70 x 40 cm applied with horse manure. A computed seed yield of 5,866 kg/ha was produced by plants spaced 70 x 20 cm fertilized with chicken dung and as to herbage yield, plants spaced closer at 70 x 20 cm fertilized with chicken dung gave the highest yield of 69.0 kg. Results showed that chicken dung supplemented with ammonium sulfate significantly affected the agronomic yield potential of the plants.
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