7 treff

Donahue Roy L.
Soils : an introduction to soils and plant growth
Roy L. Donahue, John C. Shickluna, Lynn S...
Bok Engelsk 1971
Exploring agriculture : an introduction to Food and Agriculture
Roy L. Donahue, James E. Christiansen
Bok Engelsk 1984
The agriculture dictionary
Ray V. Herren, Roy L. Donahue
Bok Engelsk 1991
Soils : an introduction to soils and plant growth
Raymond W. Miller, Roy L. Donahue ; Joyce...
Bok Engelsk 1990
Soil and water conservation
Troeh, Frederick R
Bok Engelsk 1991
Soil and water conservation : for productivity and environmental protection
Troeh, Frederick R
Bok Språk ikke angitt 1980
Agricultural mechanization in equatorial Africa
[by] C.K. Kline ... [et al.]
Bok Engelsk 1970