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Effects of Summer Grazing Strategies on Organic Reserves and Root Characteristics of Big Bluestem

Dep. of Agronomy and Horticulture and School of Natural Resources, Univ. of Nebraska-Lincoln, 279 Plant Science, Lincoln, NE 68583

View larger version (21K): [in a new window]   Fig. 1. Accumulated precipitation for the Agricultural Research and Development Center near Mead, NE, for 1999–2001 and the 30-yr average.

View larger version (15K): [in a new window]   Fig. 2. Mean root mass-density (mg cm–3) of big bluestem for June and late-summer levels of grazing averaged over both levels of May grazing in 2002 following 3 yr of grazing.

View larger version (16K): [in a new window]   Fig. 3. Mean surface area-density (mm2 cm–3) of big bluestem roots for June and late-summer levels of grazing averaged over both levels of May grazing in 2002 following 3 yr of grazing.

View larger version (15K): [in a new window]   Fig. 4. Mean root volume-density (mm3 cm–3) of big bluestem for June and late-summer levels of grazing averaged over both levels of May grazing in 2002 following 3 yr of grazing.

View larger version (14K): [in a new window]   Fig. 5. Mean root diameter (mm) of big bluestem for June and late-summer levels of grazing averaged over both levels of May grazing in 2002 following 3 yr of grazing.

View larger version (17K): [in a new window]   Fig. 6. Mean surface area-density (mm2 cm–3) of big bluestem roots for May and late-summer levels of grazing averaged over both levels of June grazing in 2002 following 3 yr of grazing.

View larger version (15K): [in a new window]   Fig. 7. Mean root volume-density (mm3 cm–3) of big bluestem for May and June levels of grazing averaged over both levels of late summer grazing in 2002 following 3 yr of grazing.

View larger version (15K): [in a new window]   Fig. 8. Mean root diameter (mm) of big bluestem for May and June levels of grazing averaged over both levels of late summer grazing in 2002 following 3 yr of grazing.