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 3

Some physical properties of the samples, pH, organic matter (%), moisture, ash (%), and organic carbon content.

Sample	pH(H2O)	Moisture content (%)	Organic matter (%)	Ash content (%)	Organic carbon (%)
JN-01	8.17	10.2	91.7	8.3	53.3
JN-02	6.52	5.3	85.7	14.4	49.8
JN-03	9.28	4.9	80.9	19.1	47.0
JN-04	10.29	7.4	68.8	31.2	40.0
JN-05	5.82	5.2	91.2	8.8	53.0
JN-06	7.55	5.1	93.3	6.8	54.2
JN-07	7.58	14.0	88.0	12.1	51.1
JN-08	6.75	6.00	94.5	5.5	55.0

Estimated by a conversion factor of 1.72.