Soil nitrogen : supply processes and crop requirements
BARTHELOMEW, W. V
Soil nitrogen : supply processes and crop requirements - Raleigh, U.S. 1972 - 78p - North Carolina State University. Technical bulletin, no.6 .
SOILS -- NITROGEN CONTENT
SOILS -- NITROGEN CONTENT
631.41 B29S
Soil nitrogen : supply processes and crop requirements - Raleigh, U.S. 1972 - 78p - North Carolina State University. Technical bulletin, no.6 .
SOILS -- NITROGEN CONTENT
SOILS -- NITROGEN CONTENT
631.41 B29S