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Suitability of Undersown Sweetclover as a Fallow Replacement in Semiarid Cropping Systems

Agriculture and Agri-Food Canada, Lethbridge Research Centre, P.O. Box 3000, Lethbridge, AB T1J 4B1, Canada

View larger version (20K): [in a new window]   Fig. 1. Percent soil moisture by weight in the top 120 cm of soil in April before seeding spring wheat.

View larger version (18K): [in a new window]   Fig. 2. Available N in the top 60 cm of soil in April before seeding spring wheat.

View larger version (20K): [in a new window]   Fig. 3. Effect of sweetclover green manure and conventional fallow on succeeding spring wheat yield.

View larger version (21K): [in a new window]   Fig. 4. Effect of sweetclover and termination method of sweetclover on succeeding spring wheat yield averaged over 3 yr.