000 00302 a2200121 4500
080 _a551.588:631.544.4(063)(4)
_bI 61 P
245 1 _aProceedings
_cedited by J. Goudriaan, et. al.
260 _aWageningen
_bPudoc
_c1990
650 _aAgro-Ecosystems
100 _a
_d
300 _a89 p.
901 _a200254
999 _c68881
_d68881