TY  - JA
AU  - Lowrance,R.
TI  - Research approaches for ecological sustainability
SN  - 0022-4561
U1  - 91-019276 
PY  - 1990///
KW  - Cropping patterns and systems
KW  - Cultural methods
KW  - Agricultural research
KW  - AGROVOC
N1  - ill. references US (DNAL 56.8 J822)
T2  - Journal of soil and water conservation (USA). (Jan-Feb 1990). v. 45(1) p. 51-54
ER  -