Open AccessDevelopment ot a black-earth soil reterence material, tested tor fertility indicators
Author(s) -
Г. А. Ступакова,
Е. Э. Игнатьева,
Т. И. Щиплецова,
Д. К. Митрофанов
Publication year - 2020
Publication title -
standartnye obrazcy
Language(s) - Uncategorized
Resource type - Journals
ISSN - 2077-1177
DOI - 10.20915/2077-1177-2019-15-4-33-40
Subject(s) - loam , certification , agrochemical , soil fertility , environmental science , mathematics , geography , soil science , soil water , agriculture , political science , archaeology , law