• Changes in Grazing Use and Herbage Moisture Content of Three Exotic Lovegrasses and Some Native Grasses

      Cable, D. R.; Bohning, J. W. (Society for Range Management, 1959-07-01)
    • Crude Protein in Rumen Contents and in Forage

      Cable, D. R.; Shumway, R. P. (Society for Range Management, 1966-05-01)
      Rumen-fistulated steers consistently selected a diet higher in crude protein than hand-clipped samples of the major available perennial grasses. The excess of rumen protein over grass protein depended on the availability of higher-protein shrubs and annual forbs that supplemented the perennial grasses, and on selection of high-protein parts of the grasses. Since the abundance of these high-protein forages varied greatly with time, the protein content of grass clippings did not reliably indicate the protein level in the steer's diet.
    • Damage to Mesquite, Lehmann Lovegrass, and Black Grama by a Hot June Fire

      Cable, D. R. (Society for Range Management, 1965-11-01)
      Twenty-five percent of mesquite trees were killed on an area with Lehman lovegrass ground cover compared to 8% on an area with black grama. Ninety percent of black grama plants and more than 98% of lovegrass plants were killed. Many new lovegrass seedlings became established on both areas.
    • Effect of Heat Treatment on Sprout Production of Some Shrubs of the Chaparral in Central Arizona

      Pond, F. W.; Cable, D. R. (Society for Range Management, 1960-11-01)
    • Effects of Shrub Removal on the Vegetation Of a Semidesert Grass-Shrub Range

      Schmutz, E. M.; Cable, D. R.; Warwick, J. J. (Society for Range Management, 1959-01-01)
    • Fire Effects on Semidesert Grasses and Shrubs

      Cable, D. R. (Society for Range Management, 1967-05-01)
      Immediate effects of fire on perennial grasses lasted only 1 or 2 years. Burroweed was easily killed, but came back quickly with adequate cool-season moisture. Fire was relatively ineffective against mesquite, fair against cactus.
    • Fourwing Saltbush Revegetation Trials in Southern Arizona

      Cable, D. R. (Society for Range Management, 1972-03-01)
      Fourwing saltbush was seeded and transplanted into native stands of (a) almost pure creosotebush and (b) velvet mesquite with burroweed understory, in southern Arizona. Burroweed and creosotebush were controlled by picloram spray and by grubbing. The mesquite was killed on half of the burroweed plots. Establishment and survival of saltbush was much higher on the creosotebush site than on the mesquite site, presumably because the calcareous (pH 8.0+) soil at the creosotebush site was more suitable than the non-calcareous neutral soil at the mesquite site. Transplants survived much better on grubbed plots than on sprayed or check plots, and seedlings on sprayed or grubbed plots than on check plots. However, after 3 years the stands were reduced to 650 and 46 plants per acre on the creosotebush and mesquite-burroweed area respectively.
    • Larger Pits Aid Reseeding of Semidesert Rangeland

      Slayback, R. D.; Cable, D. R. (Society for Range Management, 1970-09-01)
      Broad, shallow intermediate pits have proved to be longer lasting than conventional pits on semidesert range in the 6- to 8-inch summer rainfall zone in southern Arizona. Rainfall penetration averaged twice as deep in the pits as on adjacent flats. Herbage production of buffelgrass averaged 2 1/2 times as high, over a 4-year period, on the intermediate pits as on conventional pits, and five times as much as on similar adjacent untreated range.
    • Lehmann Lovegrass on the Santa Rita Experimental Range, 1937-1968

      Cable, D. R. (Society for Range Management, 1971-01-01)
      Thirty years' experience shows that Lehmann lovegrass readily establishes itself from seed under adverse conditions, reseeds itself quickly after fire or other disturbance, can withstand heavy continuous yearlong grazing, and can invade established stands of velvet mesquite. However, it is less palatable than native perennial grasses during the summer growing season, and has almost completely replaced the native perennial grasses on and adjacent to seeded areas within its preferred range./Los estudios se llevaron a cabo en la estación experimental de Santa Rita cerca de Tucson, Arizona, EUA. Se encontró después de 30 años de observaciones que el zacate Lehmann Lovegrass (Eragrostis lehmanniana Nees A-68) tiene buena adaptación a las zonas de 1,100 a 1,500 metros de altura y que tengan precipitación pluvial de 225 a 325 mm. Las siguientes ventajas y desventajas fueron encontradas: 1) Existe menor palatabilidad del zacate en el verano y mayor en el invierno que los zacates nativos. 2) El forraje seco dura mas que los nativos de un año a otro por lo tanto su uso es ventajoso para sequías. 3) Es muy agresivo ya que puede reemplazar las especies nativas e invadir montes de mezquite y tierra quemada. 4) Puede resistir el pastoreo pesado y continuado por todo el año.
    • Seasonal Patterns of Soil Water Recharge and Extraction on Semidesert Ranges

      Cable, D. R. (Society for Range Management, 1980-01-01)
      Soil water is recharged in the semidesert Southwest during the usual winter precipitation season, and again during the usual summer rainy season. The amount and depth of recharge varies widely depending primarily on the amount of precipitation, and secondarily on storm character, soil texture, vegetation cover, and evapotranspiration. Soil water depletion patterns and amounts differed among species, between plants and bare soil, and between seasons. Compared to evaporation from bare soil, plants extracted water much faster, but at more variable rates. Essentially all available soil water was used by plants or evaporated during most depletion periods.
    • Seasonal Use of Soil Water by Mature Velvet Mesquite

      Cable, D. R. (Society for Range Management, 1977-01-01)
      Mesquites used water consistently to a depth of 3 m and outward to 10 m beyond the crowns, but use at 15 m was limited mainly to drier periods when water supplies closer to the trees were depleted. With the start of spring growth, water was extracted most rapidly from the surface layers. As the season advanced, the watersupply zone became increasingly thicker. Rates of extraction were highest immediately after recharge in early spring and early summer, and lowest in late fall. Differences in available water in the soil accounted for 72 to 88% of the variation in rates of extraction. The competitive effect of velvet mesquite on perennial grasses is most severe in the upper 37.5 cm of soil under and near the mesquite crowns, and gradually decreases with distance into adjacent openings. The competitive effect in the openings is much more severe in dry years than in wet years.
    • Twenty Years of Changes in Grass Production Following Mesquite Control and Reseeding

      Cable, D. R. (Society for Range Management, 1976-07-01)
      Production of native perennial grasses and seeded Lehmann lovegrass was measured periodically for 21 years on a semidesert area where velvet mesquite was controlled by 2,4,5-T aerial spray and on an adjacent unsprayed area to determine how mesquite control would affect grass production and how long the effect would last. Grass production on the sprayed area increased dramatically during the first 5 years in a time-dependent relationship in response to the higher levels of available soil moisture. During the last 12 years, changes in lovegrass production were associated with changes in summer rainfall of the current and previous summers and of the intervening winter (2 separate variables). Because of the strong competition from lovegrass, native grass production during the last 12 years did not show its usual relationship with summer rainfall, but decreased gradually and consistently on both the sprayed and unsprayed areas. At the end of the study period, native grasses provided only 10% of the total perennial grass production on the sprayed area and 20% on the unsprayed. Increased grass production, resulting from the mesquite control treatment and seeding, paid for the treatment within 4 years, and the sprayed area was still producing more grass than the unsprayed area 20 years later.