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Optimum Planting Procedures for Eastern Gamagrass

^a Dep. of Agron., Iowa State Univ., Ames, IA 5001
^b Dep. of Stat., Iowa State Univ., Ames, IA 5001

View larger version (33K): [in a new window]   Fig. 1. Monthly average precipitation from August 1999 to June 2002 for the Iowa State University Agronomy–Agricultural and Biosystems Engineering Farm near Ames, IA.

View larger version (51K): [in a new window]   Fig. 2. Monthly mean temperature from August 1999 to June 2002 for the Iowa State University Agronomy–Agricultural and Biosystems Engineering Farm near Ames, IA.

View larger version (50K): [in a new window]   Fig. 3. The effects of combinations of planting depth, seed stratification, and planting date on net survival of eastern gamagrass at 1 yr after planting. Because of considerable emergence in the second year after planting, counts for the 17 April and 15 May 2002 plantings were extended to 28 May and 11 June 2002, respectively.

View larger version (26K): [in a new window]   Fig. 4. The effects of planting date and seed stratification combinations on mortality of eastern gamagrass seedlings in the year after planting. Each bar represents the average of seedlings for planting depths of 2.5 and 5.0 cm. Because of considerable emergence in the second year after planting, counts for the 17 April and 15 May 2002 plantings were extended to 28 May and 11 June 2002, respectively.

View larger version (32K): [in a new window]   Fig. 5. Emergence patterns of eastern gamagrass planted in the fall at various combinations of planting date, depth, and seed stratification.

View larger version (36K): [in a new window]   Fig. 6. Emergence patterns of eastern gamagrass planted in the spring at various combinations of planting date, depth, and seed stratification.