Planned change in farming systems : progress in on-farm research /
Planned change in farming systems : progress in on-farm research /
edited by Robert Tripp.
- New York : J. Wiley ; Co-publication with Sayce Pub., c1991.
- x, 348 p. : ill., maps ;
0471934178
Agriculture--Research--On-farm.
Agricultural systems--Research.
S540.O53P58 1991
0471934178
Agriculture--Research--On-farm.
Agricultural systems--Research.
S540.O53P58 1991