Lack of standard recommendation on the quantity of organic materials to apply to crop fields
leads to over or under application of the plant nutrient to the soil, due to lack of knowledge
about the exact quantity of nutrient the organic material contains hence, underscores the need
to examine the nutrient content of organic materials intended for use on agricultural fields. A
laboratory experiment was conducted to examine the nutrient contents of some selected organic
materials in Kano state. The samples collected include; poultry manure, cattle manure, goat
manure, sheep manure, rabbit manure, horse manure, camel manure, donkey manure, millet
husk, neem leaves, wood shaving, charcoal, egg shell, termitarium, compost, farm yard
manure, crop residues, maize bran, wood ash and rice husk. The samples after collection where
prepared and analyzed for routine soil chemical properties using standard laboratory
procedure. The data collected from the laboratory analysis was subjected to statistical analysis
using analysis of variance (ANOVA) at 5% level of significance and the means were separated
using turkey’s 95% confidence interval. The result indicates that the highest total N value was
obtained in poultry manure followed by sheep dung and goat manure. While the highest
phosphorus content was obtained in cow manure with phosphorus content of (21.86g kg-1)
while rabbit manure had the highest content of K (1.13 gkg-1). For soils deficient in Zn, the
application of compost is recommended because compost gave the highest Zn content among
the manures. The result of this research may serve as a benchmark for providing organic
fertilizer recommendations for crops, this type of information may also be used by crop
simulation modelers as an estimate for each manure type from this region.
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