For citations:

Zakharova I.A., Iumashev Kh.S. PHOSPHORUS AND POTASSIUM RESERVES IN THE MAIN TYPES OF ZONAL SOILS OF THE CHELYABINSK REGION. Bulletin of NSAU (Novosibirsk State Agrarian University). 2020;(3):38-45. (In Russ.) https://doi.org/10.31677/2072-6724-2020-56-3-38-45