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Production Functions for Chickpea, Field Pea, and Lentil in the Central Great Plains

USDA-ARS, Central Great Plains Res. Stn., 40335 County Rd. GG, Akron, CO 80720

View larger version (21K): [in a new window]   Fig. 1. Plot layout for water use–yield studies

View larger version (22K): [in a new window]   Fig. 2. Water use–yield production functions for chickpea, pea, and lentil

View larger version (23K): [in a new window]   Fig. 3. Two-week running average daily maximum temperature and vapor pressure deficit at Akron, CO in 1996, 1997, and 1998

View larger version (23K): [in a new window]   Fig. 4. Volumetric water content of rainfed plots (avg. across years) at planting and harvest for chickpea, field pea, and lentil; also, lower limit of volumetric water for winter wheat on Weld silt loam at Akron, CO. Bars are ± one standard deviation

View larger version (18K): [in a new window]   Fig. 5. Frequency distributions of chickpea, field pea, and lentil yields predicted from production functions, average soil water extraction, and historical precipitation records (1965–1999) from Akron, CO