5 treff

The World's worst weeds : distribution and biology
LeRoy G. Holm, Donald L. Plucknett, Juan ...
Bok Engelsk 1991
Networking in international agricultural research
Donald L. Plucknett, Nigel J.H. Smith, an...
Bok Engelsk 1990
Gene banks and the world's food
Donald L. Plucknett ... [et al.]
Bok Engelsk 1987
Azolla as a green manure : use and management in crop production
Thomas A. Lumpkin and Donald L. Plucknett...
Bok Engelsk 1982
Crop tolerance to suboptimal land conditions : proceedings of a symposium : the papers were presented during the annual meeting in Houston, Texas, November 28-December 3, 1976
sponsored by Divisions A-6 ... [et. al.] ...
Bok Engelsk 1978