Phosphorus Speciation by ³¹P NMR Spectroscopy in Leaf Litters and Crop Residues from Para Rubber, Cocoa, Oil Palm, and Banana Plantations in the Humid Forest Zone of Cameroon

Table 1

Description of sampling sites of the crop residues and litters used for the study.

Land use type	Location	Longitude	Latitude	Elevation (m)	Soil type
Banana	Mussaka	04° 11.468′	009° 19.25′	477	Volcanic soil
Cocoa	Ekona	04° 06.167′	009° 23.51′	34	Volcanic soil
Rubber	Misellele	04° 07.555′	009° 26.62′	35	Volcanic soil
Oil palm	Maumu	04° 12.29′	009° 19.76′	437	Volcanic soil