Soil bu ld ng a l nt dr v n r wh r b rb n is u t r d fr m th atmosphere nd l k d nt th l nd in d ng, changes the v r ll b l g l, chemical and physical r rt f the l - in a b n f l way. Soil organic m tt r n b divided into 3 parts - th l v ng, th d d and the v r dead. Th l v ng rt - huge d v r t of m r - rg n m , u h b t r , viruses, fung , protozoa, lg nd n m t d ; l , l nt r t , n t , rthw rm , nd larger n m l . Th d d rt - d d l nt ...
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Soil bu ld ng a l nt dr v n r wh r b rb n is u t r d fr m th atmosphere nd l k d nt th l nd in d ng, changes the v r ll b l g l, chemical and physical r rt f the l - in a b n f l way. Soil organic m tt r n b divided into 3 parts - th l v ng, th d d and the v r dead. Th l v ng rt - huge d v r t of m r - rg n m , u h b t r , viruses, fung , protozoa, lg nd n m t d ; l , l nt r t , n t , rthw rm , nd larger n m l . Th d d rt - d d l nt roots, r residues, root xud t , d d m r and m r organisms, nd animal manures. Th is the active, r l d m d, fr t n f rg n m tt r th t th main supply f f d f r th v r u rg n m . The v r d d rt - humu - very t bl , m l x nd w ll-d m d rg n m tt r. Humus n rg n -m n r l m l x m r ng b ut 60% rb n nd b tw n 6 and 8% n tr g n, h h ru nd ul hur. Proportionally, it has a hug urf r and can store b th t n nd n n nd is n nt l f t r n l fertility. Th organo-mineral complexes f rm a stable nd inseparable rt of the l matrix th t n r m n intact for hundr d f years.
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