Non symbictic nitrogen fination and organic matter in the tropics : 12 th international congress of soil science held on New Delhi, India February 8 -16, 1982 - International Congress of Soil Science 1982, Feb 8-16 : New Delhi, India) (New Delhi : International Congress of Soil Science, 1982)
Library has vol. 1, 2 and 3
Keywords: Soils -- Composition; Soil Chemistry