TY JOUR TI COMPARATIVE STUDY OF THE DIFFERENT TYPES OF ORGANIC FERTILIZERS INFLUENCE ON THE CONTENT OF HUMUS IN TECHNOLOGICALLY DISTURBED LIGHT GRAY FOREST LIGHT LOAMY SOIL KW mechanical disturbance of soils KW light gray forest light loamy soil KW organic fertilizers KW humus. JO INTERNATIONAL AGRICULTURAL JOURNAL AU Titova, V.. AU Vetchinnikov, A.. AU Krasovsky, A.. PY 2019 IS 2 PB Electronic science