TY  JOUR
TI  The effect of straw on the humus state of chernozem
KW  organic matter
KW  humus
KW  labile humus
KW  nitrogen
KW  fractional composition of humus
KW  humic acids
KW  fulvic acids
KW  nitrogen fertilizers
JO  Agrarian Bulletin of the
AU  Yumashev, H.S.
AU  Zaharova, I..
PY  2023
IS  229
PB  Ural State Agrarian University