A Classification System for California's Hardwood Rangelands
نویسندگان
چکیده
منابع مشابه
A Dynamic Model of California's Hardwood Rangelands
Low profitability of hardwood rangeland manage ment, and oak tree harvesting for firewood markets and forage enhancement has led to concern about the long-term sustainability of the oak resource on rangelands. New markets for recreational hunting may give value to oaks for the habitat they provide for game species, and broaden the economic base for managers. A ranch level optimal control model...
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Long-term residual dry matter mapping on the San Joaquin Experimental Range provides a working example of this monitoring technique for grazing management and research. Residual dry matter (RDM) is the amount of old plant material left on the ground at the beginning of a new growing season. RDM indicates the previous season’s use and can be used to describe the health or condition of annual ran...
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In many parts of California, the rate and progression of land use change in the hardwood rangeland depend upon the decisions of ranchers. As major landowners in these regions, a rancher’s decision to subdivide or sell for development are significant moves toward land use change. In many instances, a single landowner decision may effect the disposition of thousands of acres of hardwood rangeland...
متن کاملThe Impact of West Nile Virus on Birds in California’s Hardwood Rangelands
West Nile virus has undergone an unprecedented rate of infection in North America, sweeping from New York to California in four years. It attacked an exceptionally broad range of hosts/vectors over a broad geographic area. In 2004, the California Department of Health Services received approximately 98,000 reports of dead birds, representing tens of millions of birds killed by West Nile virus in...
متن کاملA 3D Optimal Bucking System for Central Appalachian Hardwood Species
An optimal tree-stem bucking system was developed for central Appalachian hardwood species using 3D modeling techniques. ActiveX Data Objects were implemented via MS Visual C++/OpenGL to manipulate tree data which were supported by a backend relational data model with five data tables for stems, grades and prices, logs, defects and stem shapes. Network analysis algorithm was employed to achieve...
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ژورنال
عنوان ژورنال: Hilgardia
سال: 1991
ISSN: 0073-2230
DOI: 10.3733/hilg.v59n02p045