Influence of fertilizers system on fractional compositionand balance of humus in soddy-podzolic soil of Komi Republic
The efficiency of organic and mineral fertilizers and their combinations for humus accumulation and balance, group and fraction composition has been studied in application to soddy-podzolic light-loamy soil in field conditions. Established that combined application of organic and mineral fertilizers in six-field crop rotation provided significant humus accumulation and improved humus quality: fraction of humic acids № 2 increased from 3,1 till 7,8%, ratio of C from humic acids and from fulvic acids increased from 1,02-1,16 till 1,23-1,50.