NDLTD Global ETD Search
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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Search results

Showing 21 to 25 of 25 (0.078 seconds)

Spelling suggestions: "subject:"rangelands -- arizona."" "subject:"rangelands -- orizona.""

21

Sensitivity of frequency and canopy cover to changes in vegetation

Mirreh, Mohamed Mohamud January 1981 (has links)
No description available.
Rangelands -- Research -- Arizona.
Rangelands -- Arizona.
Santa Rita Experimental Range (Ariz.)
22

Successional trends on protected versus grazed desert grassland ranges in Arizona

Smith, David Allen, 1943- January 1970 (has links)
No description available.
Plant succession -- Arizona.
Rangelands -- Arizona.
Grassland ecology -- Arizona.
Grasslands -- Arizona.
23

THE USE OF LARGE-SCALE AERIAL PHOTOGRAPHY FOR DETECTING CHANGES OF AN ARID RANGELAND IN SOUTHWESTERN ARIZONA

Knapp, Paul Aaron January 1985 (has links)
Interpretation of large-scale color infrared and color aerial photography can be a labor and cost-effective means for inventorying and monitoring rangelands while maintaining accuracy. Ground measurements of vegetation cover at Organ Pipe Cactus National Monument were taken in 1975 and 1984. Large-scale (1:1200) color and color infrared aerial photo estimates were compared to these ground measurements through regression and correlation to check photo accuracy. Relationships between photo estimates and ground measurements of total vegetation and shrub cover were strong when using either film type. Color infrared photo estimates corresponded better with ground measurements for both tree cover and cactus cover than color photo estimates. Large-scale aerial photography is also useful for determining some of the causes of vegetation change. Evidence gathered from both sets of photos suggested that vegetation change at OPCNM was largely the result of domestic livestock removal and short-term climatic fluctuations.
Rangelands -- Arizona.
Arizona -- Aerial photographs.
Vegetation surveys.
Aerial photography in agriculture.
24

Dynamics of a desert grassland range in relation to drought, fire and grazing

Sourabie, Kouana Martin January 1982 (has links)
No description available.
Vegetation dynamics -- Arizona.
Rangelands -- Arizona.
Droughts -- Arizona.
Grazing -- Arizona.
Grassland fires -- Arizona.
25

The effects of nitrates and phosphates upon forage production of a southern Arizona desert grassland range

Freeman, Barry Newell, 1930- January 1955 (has links)
No description available.
Rangelands -- Arizona.
Forage plants -- Arizona.
Plants -- Effect of nitrates on.
Plants -- Effect of phosphorus on.

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