V.V. Dokuchaev Soil Science Institute

CONTENTS

The development of theory on humus and soil organic matter: from Turin and Waksman to present days

A. L. Ivanov, B. M. Kogut, V. M. Semenov, M. Turina Oberlander, N. Waksman Schanbacher (P. 3-38)

The organic matter of Chernozem

B. M. Kogut (P. 39-55)

The optical characteristics of aggregates organic matter fractions in Typical Chernozems

V. A. Kholodov, V. A. Ivanov, Ju. R. FarKhodov, N. A. Safronova, Z. S. Artemyeva, N. V. Jaroslavceva (P. 56-72)

The role of organic and mineralogical interaction products in the structure forming and humus forming of the basic types of soils in the center of Russian Plain

Z. S. Artemyeva, N. P. Kirillova (P. 73-95)

The organic matter pool, composition and transformation in soils of Middle Siberia

V. V. Chuprova (P. 96-115)

Father and Soil Science Institute

M. Tyurina Oberlander  (P. 116-118)