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Irrigated Tall Fescue–Legume Communities in the Southern Rocky Mountains

Years Five to Eight

^a Tucumcari Agric. Sci. Cent., New Mexico State Univ., 6502 Quay Rd. AM.5, Tucumcari, NM 88401
^b Alcalde Sustainable Agric. Sci. Cent., New Mexico State Univ., P.O. Box 159, Alcalde, NM 87511

View larger version (16K): [in a new window]   Fig. 1. Seasonal variation in percentage of tall fescue in swards of tall fescue as a monoculture and in binary mixtures with selected pasture legumes at Alcalde, NM. Bars indicate the LSD (P < 0.05) for within harvest date comparisons. Absence of an LSD on a date indicates no significant difference among treatments. Data are calculated as harvested grass dry matter (DM)/total (grass + legume) DM, averaged over 4 yr (1998–2001). MONO, ALF/TF, BFT/TF, CM/TF, and KC/TF signify tall fescue monoculture and binary mixtures of tall fescue with alfalfa, birdsfoot trefoil, cicer milkvetch, and kura clover, respectively.

View larger version (24K): [in a new window]   Fig. 2. Variation between years in seasonal distribution of dry matter (DM) yield of the legume component in swards of tall fescue as a monoculture and in binary mixtures with selected pasture legumes at Alcalde, NM, from 1998 to 2001. Bars indicate the LSD (P < 0.05) for within harvest date comparisons. MONO, ALF/TF, BFT/TF, CM/TF, and KC/TF signify tall fescue monoculture and binary mixtures of tall fescue with alfalfa, birdsfoot trefoil, cicer milkvetch, and kura clover, respectively.

View larger version (23K): [in a new window]   Fig. 3. Variation in seasonal distribution of combined (grass + legume) dry matter (DM) yield of swards of tall fescue as a monoculture and in mixtures with selected pasture legumes at Alcalde, NM, from 1998 to 2001. Bars indicate the LSD (P < 0.05) for within harvest date comparisons. Absence of an LSD on a date indicates no significant difference among treatments. MONO, ALF/TF, BFT/TF, CM/TF, and KC/TF signify tall fescue monoculture and binary mixtures of tall fescue with alfalfa, birdsfoot trefoil, cicer milkvetch, and kura clover, respectively.