2

The effect of extracted humus substances on growth of tomato plants

Year:
1959
Language:
english
File:
PDF, 1.33 MB
english, 1959
4

Application of Humus substances to overground organs of plants

Year:
1959
Language:
english
File:
PDF, 842 KB
english, 1959
5

The application of extracted humus substances to overground parts of plants

Year:
1959
Language:
english
File:
PDF, 326 KB
english, 1959