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Prairiegrass–Brassica Hybrid Swards for Autumn Dry Matter Production

USDA-ARS, Appalachian Farming Syst. Res. Cent., 1224 Airport Rd., Beaver, WV 25813-9423

View larger version (19K): [in a new window]   Fig. 1. Monthly and 30-yr mean maximum and minimum air temperatures and precipitation for 2003 and 2004, at Beckley, WV.

View larger version (46K): [in a new window]   Fig. 2. Botanical composition of prairiegrass, brassica hybrid, and a prairiegrass–brassica hybrid mixture during 2003 and 2004. Values representing the number of contacts (as a percentage) are the mean of three replicates.

View larger version (31K): [in a new window]   Fig. 3. Seeded species dry matter (DM) yield of prairiegrass, brassica hybrid, and prairiegrass–brassica hybrid mixtures in 2003 and 2004 as a function of planting method. Vertical bars are standard error of the mean.

View larger version (26K): [in a new window]   Fig. 4. Mean values for (A) relative yield and (B) relative yield of mixture for prairiegrass–brassica hybrid stands in 2003 and 2004.

View larger version (39K): [in a new window]   Fig. 5. Mean values for (A) crude protein (CP), (B) total nonstructural carbohydrate (TNC), and (C) total digestible nutrient (TDN) concentrations of prairiegrass, brassica hybrid, and prairiegrass–brassica hybrid mixtures during 2003 and 2004. Vertical bars are standard error of the mean.

View larger version (11K): [in a new window]   Fig. 6. Mean values for total digestible nutrient (TDN):crude protein (CP) quotients of stockpiled herbage of prairiegrass, brassica hybrid, and a prairiegrass–brassica hybrid in 2003 and 2004. Vertical bars are standard error of the mean.

View larger version (23K): [in a new window]   Fig. 7. Mean values for (A) relative nutrient yield and (B) relative nutrient yield of mixture for prairiegrass–brassica hybrid stands in 2003 and 2004.