rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Effect of shrub management techniques on water quality and quantity on Coastal Bend rangeland
  name:
    name part: Stewart, Michael Patrick
    name part: 1976-
    role:
      role term: creator
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: xx
    date issued: 2003
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    form: remote
    extent: xi, 92 leaves : illustrations ; 28 cm.
  abstract: Extensive studies on runoff from South Texas croplands and urban areas exist; however, little is known of the importance or impact of runoff generated from South Texas rangelands. Therefore, the objectives of this study are: (1) to assess the impacts of various rangeland management practices (grazing, herbicide treatment of the woody shrubs, and herbicide treatment of the shrubs followed by burning) on water yield and (2) to assess the impacts of various rangeland management practices on sediment loss and levels of nitrogen and phosphorus in runoff water. Three 1-ha watersheds, WS1-HB (Herbicide and Burn), WS2-HERB (Herbicide), and WS3-UNT (Control-Graze only), were surveyed and installed on Chaparral-Mixedgrass Communities located on a Monteola soil on the Welder Wildlife Refuge near Sinton, Texas. Ten months following treatment, woody shrub canopy cover was reduced by 41%, 60%, and 10% in WS 1, 2, and 3, respectively. Grass, forb, and litter standing crop increased in all 3 watersheds except for grass and forb standing crops in WS1-HB. Average infiltration rates for run 1 simulations were greater than 100 mm/hr except WS3-UNT brush plots (76 mm/hr). Run 2 average infiltration rates remained above 100 mm/hr except WS2-HERB woody shrub plots (96 mm/hr) and WS1-HB grass (72 mm/hr) and woody shrub plots. Run 3 average infiltration rates remained similar to run 2 grass and shrub in WS1-HB and WS2-HERB. WS3-UNT run 3 dropped to 67 mm/hr and 66 mm/hr in grass and shrub plots, respectively. Sediment in runoff waters was greatest on WS1-HB grass and shrub plots following treatment. WS2-HERB sediment increased in grass plots and was constant in shrub plots following treatment. WS3-UNT sediment production varied greatly between simulator runs and among shrub and grass plots. No significant increases in nitrates were found in WS1-HB and WS2-HERB grass or shrub plots following shrub treatment. Total Kjeldahl N (TKN) and P showed significant increases in 2 months following herb…
  note: by Michael Patrick Stewart.
  note: "Major subject: Rangeland Ecology and Management".
  note: Vita.
  note: Also available online.
  note: Issued also on microfiche from Lange Micrographics.
  note: M.S. Texas A&M University 2003
  note: Includes bibliographical references (leaves 80-84).
  subject:
    topic: Major rangeland ecology and management
  identifier: https://hdl.handle.net/1969.1/ETD-TAMU-2003-THESIS-S787
  related item:
    location:
      url: https://hdl.handle.net/1969.1/ETD-TAMU-2003-THESIS-S787
  record info:
    record content source: TXA
    record creation date: 040707
    record change date: 20220103134303.0
    record identifier: in00001852836