Soil Fertility, Phosphorus Fractions, and Maize Yield as Affected by Poultry Manure and Single Superphosphate

Table 1

Source of the soil used.

Location	State	Coordinates	Vegetation	Soil series	Soil class (USDA)
Ibadan	Oyo	Lat. 7°30′; Long. 3°54′	Rainforest	Iwo	Ferrudulf