Treesearch

Consideration of cumulative watershed effects (CWEs) has both political and physical aspects. Regardless of the practical usefulness of present methods of dealing with CWEs, the legal requirement to address them remains. Management of federal land is regulated by the National Environmental Policy Act (NEPA) and the Federal Water Pollution Control Act of 1972. The state of California has passed analogous laws: California Environmental Quality Act (CEQA) and the Porter-Cologne Act--both of which affect management on private land, primarily through the Forest Practice Regulations that they...

The Symposium on the Ecology, Management, and Utilization of California Oaks held in June 1979 at Claremont, California, was the first to take a comprehensive look at California's native oak resource. At that time, interest in several species of California oaks was rapidly growing with particular concern about their regeneration, preservation, and wildlife relationships. Urbanization and loss of oak woodlands was beginning to focus a new facet of concern on hardwoods, and regulations to monitor their use were established or seriously considered by a number of county governments. Until that...

When planted in sheltered sites in northern California, only 49% of black walnut (Juglans nigra L.) and 58% of black cherry (Prunus serotina Ehrh.) survived for 15 years, and 20% of northern red oak (Quercus rubra L.) survived for 10 years. The black walnut trees averaged 0.6 inches diameter at breast height (dbh) and 5.4 feet in height when measured at 15 years; the black cherry trees averaged 2.1 inches dbh and 20.3 feet in height. The northern red oak seedlings taller than breast height averaged 1.0 inch dbh and 3.8 feet in height. In northern California, only the black cherry shows any...

Abstract - Pipeflow dynamics are being studied at Caspar Creek Experimental Watershed in north-coastal California near Ft. Bragg. Pipes have been observed at depths to 2 m within trenched swales and at the heads of gullied channels in small (0.8 to 2 ha) headwater drainages. Digital data loggers connected to pressure transducers monitor discharge using calibrated standpipes. During storms, pipeflow up to 8 l s-1 has been measured, while, within the same swales, no surface channel flow occurred. Pipeflow discharge has been correlated with antecedent precipitation

Palau is an archipelago of high and low islands located in the western Caroline Islands. The largest island in the group is the heavily forested high island of Babelthuap. Knowledge of the soils and the extent and composition of Palau's vegetation, including the forests, is needed for land-use planning. To fill this need, a formal agreement was drawn up between the High Commissioner of the Trust Territory of the Pacific Islands, and twoagencies of the U.S. Department of Agriculture—the Soil Conservation Service and the Forest Service. Vegetation maps of Palau are a product of this agreement...

Truk is one of the four States of the Federated States of Micronesia (FSM). Knowledge of the extent and composition of its vegetation, including forest land, is needed for land-use planning. To fill this need, a formal agreement was drawn up between the High Commissioner of the Trust Territory of the Pacific Islands and two agencies of the U.S. Department of Agriculture-the Soil Conservation Service and the Forest Service, to map the vegetation of Truk. Three vegetation maps were prepared by the Forest Service in cooperation with the Government of the State of Truk, for land-use planning...

The soils and vegetation of the Caroline high islands, Federated States of Micronesia, are being mapped by the U.S. Department of Agriculture's Forest Service and Soil Conservation Service. By the end of 1987, vegetation maps and reports on Kosrae, Pohnpei, Yap, four Truk Islands, and Palau are expected to be available. To compare soil types with vegetation types, vegetation maps were laid onto soils maps of these islands. There may be correlation with individual vegetation species and soil acidity, but no clear correlation was apparent between strongly acid soils and broad vegetation...

Yap is one of the four States in the Federated States of Micronesia. Knowledge of the extent and composition of its vegetation, including forest land, is needed for land-use planning. To fill this need, a formal agreement was drawn up between the High Commissioner of the U.S. Trust Territory of the Pacific Islands and two agencies of the U.S. Department of Agriculture-the Soil Conservation Service and the Forest Service to map the vegetation of Yap. The four maps were prepared by the Forest Service in cooperation with the State Government of Yap and are intended to serve as a working tool...

Partial and complete spring defoliation reduced first-year diameter, height, and volume growth of 4-year-old loblolly and slash pines. Early and late growth differed significantly between defoliation levels (P=0.05). However, the number of height growth flushes produced during the 1986 growing season was not affected by defoliation treatments. No mortality occurred during 1986. Mean volume growth loss of the 100-percent defoliated trees was 68 and 56 percent, respectively, for loblolly and slash pines.