Low
soil fertility is one of the main factors for the low
productivity of vegetables in Nigeria. The effect of different
organic manures on the agronomic performance of Corchorus
olitorus was carried out in a Randomized Complete Block Design
(RCBD) at the Teaching, Commercial and Research Farms of Rufus Giwa
Polytechnic, Owo, Ondo State. Four treatments namely: poultry
manure (PM) 50kg/20m2, pig dung (PD) 50kg/20m2, cow dung (CD)
50kg/20m2and control (with no manure) were evaluated and replicated 4
times. Results shows that plant height, stem girth, number of leaves,
and leave area index at 2, 4 and 6 weeks after planting (WAP) and
yield were significantly influence by the application of
organic manures compared to control. C. olitorus responded to the
manure application in the following order; PM, PD, CD and plot with no
manure amendment (control). The higher major nutrients
constituents in PM and PD has influence on the
growth and yield of C. olitorus. Therefore, the cultivation
of C. olitorus in South West Nigeria could be a profitable
enterprise as against popular belief if emphasis is placed on the use of
fertilizers from organic sources."
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