The effect of organic fertilizers on the fertility of deflated chestnut soils

摘要

Unconventional organic fertilizers exerted an uncertain effect on the fertility of deflated chestnut soils. The application of sawdust-poultry manure and bark-poultry manure composts increased the share of fraction HA (humic acids)-1; a tendency toward the increase in the share of the HA-2 fraction was observed. The application of straw-poultry manure compost resulted in a decrease in the content of the HA-2 fraction. Changes in the group composition of humus were insignificant.