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122 result(s) for herbage loss
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Grazing-mediated differentiation in <em>Agropyron smithii</em>: Evidence from populations with different grazing histories
Date: 1990
Authors: H. W. Polley, and J. K. Detling
Summary: Polley and Detling collected western wheatgrass (<em>Agropyron smithii</em>) from a heavily grazed area in South Dakota, colonized by black-tailed prairie dogs (<em>Cynomys ludovicianus</em>), and from an adjacent lightly graz ...
Keywords: black-tailed prairie dog, cynomys ludovicianus, western wheatgrass, agropyron smithii, nitrogen, biomass yield
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WEPP and GLEAMS simulations of runoff and soil loss from grazed pasture in the southeastern United States
Date: 1999
Authors: W. E. Pitts, K. H. Yoo, M. S. Miller-Goodman, W. L. de los Santos, and K. S. Yoon
Summary: Predicted values of surface runoff and erosion from two current erosion models (WEPP and GLEAMS) were compared to observed data recorded during January (1995) to August (1996) from the Tennessee Valley region of Alabama. Twelve runoff plots were loca ...
Keywords: erosion prediction models, wepp, gleams, switchgrass, bermudagrass, tall fescue, runoff, sediment yield
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Costs of reproduction in the pink lady's slipper orchid (<em>Cypripedium acaule</em>): Defoliation, increased fruit production, and fire
Date: 1994
Authors: R. B. Primack, S. L. Miao, and K. R. Becker
Summary: Primack et al. determined if a cost of reproduction is apparent when plants have their photosynthetic capacity reduced by experimentally removing 50% or 10% of their leaf area. Plants that had both leaves removed and produced a fruit in 1987 decreas ...
Keywords: resource use, photosynthetic area, pollination, simulated herbivory, carbohydrate storage, fruit production
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Dry-year grazing and Nebraska sedge (<em>Carex nebraskensis</em>)
Date: 1987
Authors: R. D. Ratliff, and S. E. Westfall
Summary: Ratliff and Westfall examined the responses of Nebraska sedge (<em>Carex nebraskensis</em>) to protection and grazing. The study took place in Tule Meadow, in the Sierra National Forest, California where heavy grazing took place after sev ...
Keywords: grazing, clipping, carex nebraskensis, forage species, protection, shoot frequency, shoot density, nitrogen, phosphorous
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Changes in lizard abundance on protected versus grazed desert scrub in Baja California Sur, Mexico
Date: 1999
Authors: H. L. Romero-Schmidt, and A. Ortega-Rubio
Summary: Within the ungrazed livestock exclosure, grass cover, herb cover and average height were higher compared to outside the exclosure. Outside the exclosure, fallen tree trunks and exposed soil were higher. Some of the invertebrate species that lizards ...
Keywords: urosaurus nigricaudus, uta stansburiana, cnemidophorus hyperythrus, livestock grazing, livestock enclosure, perennial grass
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