TY  - JA
AU  - Colwell,J.D.
TI  - Some considerations in modelling the effects of fertilizers on crop yields [review]
SN  - 0045-0545
U1  - 83-860855 
PY  - 1981///
KW  - Fertilizers
KW  - AGROVOC
KW  - Fertilizers and manures general
KW  - Soil fertility
N1  - 1 table, 20 ref
T2  - Journal of the Australian Institute of Agricultural Science
ER  -