SOM formation efficiency
Post-incubation C contents of the model soils, expressed on the basis of
initial litter C content, were used to represent their formation
efficiency of SOM. The formation efficiency of SOM ranged from 328.8 g-C
kg-1 litter C to 960.9 g-C kg-1litter C (Supplementary Table 2) and was significantly (P< 0.05) affected by litter and clay mineral types and their
interaction. It was higher for maize litter than for soya litter in all
model soils and was higher in the vermiculitic soil than in other soils
for both litter types. Apart from the vermiculitic soils, other model
soils were significantly separated only for maize litter.