How can leaf-litter from different species growing in short rotation coppice contribute to the soil nutrient pool?

Nutrient cycle in litter. The percentages of litterfall and retranslocation are referred to the initial nutrient content of the green leaf, while the percentage of decomposition is referred to the nutrient content in the litterfall. The species described in this diagram are: Populus spp.; Platanus × hispanica; Salix matsudana × Salix spp. and Robinia pseudoacacia.