1. Application of nitrogen-fixing systems in soil improvement and management, soil Resources, Management and Conservation Service, Land and Water Development Division
Author: Hamdi, J. A.
Library: Central Library and Information Center of Ferdowsi University of Mashhad (Khorasan Razavi)
Subject: Fixation ، Nitrogen,، Soils
Classification :
S
651
.
H35
2. Biological nitrogen fixation for sustainable agriculture
Author: / edited by J.K.Ladha,T.George and B.B.Bohlool
Library: Central Library and Document Center of Arak University (Markazi)
Subject: Nitrogen-Fixation-- Congresses,Nitrogen-- Congresses,Soils-Nitrogen content-- Congresses
Classification :
589
.
90133
S989b
1990
