TABLE 2. Maximum and minimum estimates of wheat yield (1 Mg = 1 metric ton) by eight models from the GCTE Wheat Network. Models simulated the growth of hypothetical wheat crops using common weather data sets and the same time course of leaf area index (LAI) development. (From Goudriaan et al. 1994).

	Day of year of anthesis	Day of year of maturity	LAI (m2/m2)	Total aboveground dry mass (Mg/ha)	Grain dry mass (Mg/ha)
Crookston, Minnesota, USA (spring wheat)
Prescribed	183	216
Minimum	182	215	4.5	10.6	3.6
Maximum	187	216	4.5	16.1	8.8
Lelystad, The Netherlands (winter wheat)
Prescribed	166	207
Minimum	164	204	7.5	13.5	5.5
Maximum	166	207	7.5	26.4	12.1