The experiment was conducted at the teaching and Research farm of the
Federal University Wukari Taraba State, Nigeria to assess, evaluate and
compare the effect of organic fertilizers such as poultry manure, cow
dung, organic manure and in-organic fertilizers such as NPK and urea on
the growth and tuber yield of sweet potato. The recommended rates of cow
dung (10t/ha) poultry manure (10t/ha), organic manure (10t/ha)
NPK15:15:15 (400kg/ha) and urea (200kgN/ha) were applied as treatment to
sweet potato with a control at (0kg/ha). These were arranged in a
randomized complete block design with three replications. Measurement
were taken on the growth and tuber yield at harvest such as the length
of primary vein, number of secondary vein number of leaves, number of
tuber and tuber weight. Data collected were analyzed using (ANOVA) and
the significant means separated using Duncan multiple difference at 5%
probability level. The result revealed or showed that numbers of leaves
were significant in all the treatments. Application of urea fertilizer
produced the highest number of tuber per plant, while tuber weight was
not significantly different, but poultry manure application had the
higher mean value of (2.34kg). It was concluding that application of
poultry manure as organic fertilizer are better and can compare readily
with inorganic fertilizer (urea) in the production of sweet potato.
Sweet potato is one of the most important field crop in the world and
many studies have been carried out on the growth, productivity and
nutritional properties including the effect of organic and inorganic
fertilizers applications.The study therefore compares the effectiveness
of available organic and inorganic fertilizer on the growth and tuber
yield of the crop.
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This study received no specific financial support.
The authors declare that they have no competing interests.
All authors contributed equally to the conception and design of the study.