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