Distribution of annual grasslands, oak-woodlands and chaparral that make up California’s annual rangelands.Fig. 2010, Appendix A). There is a transition from annual grasslands to oak-woodlands with increasing elevation and rainfall.

Range Manage. Forage growth may be sparse during this period and dry matter losses may occur (Fig. As a state California has an extremely diverse natural landscape. 1988a, 1988b, 1989, and 2001 and 2010). Management Controls on Productivity. 3. Annual Range Forage Production. Taprooted filaree (Fig. While average precipitation often results in average productivity, near average production can also occur in low rainfall years (e.g. Orographic and elevational effects influence the location and distribution of precipitation in the annual rangelands. 2. Pgs 173-199.Murphy, A.H. 1970. 2007). The growing season starts with the first germinating rains in the fall and                     ends when soil moisture is depleted at the beginning of the dry season.Break of season follows the first fall rains that exceed 0.5 to 1 inch (1.27 to 2.5 cm) during a 1- week period (Bentley and Talbot 1951). Rangelands 32 (3):16-20.Hart, G.H., Guilbert, H.R. It should be noted that some people classify the extent of the mediterranean region of the west coast to extend through Oregon and Western Washington. Circular No. 4. 1967-68) or in high rainfall years (e.g.

Bull. State of California, Resources Agency, Department of Fish and Game, Sacramento, CA. 6 G and H). 3. Droughts that exceed three years are uncommon, though occurrences in the past century include 1929-1934, 1947-1950, and 1987-1992.

In:  Hueneke, L.F. and H. Mooney (eds). 2.
1989. For the range livestock producer, a normal year is characterized by near average forage production. Calif. Agric. Management decisions may be guided by these patterns, and as the season progresses patterns become set and the outcome becomes more predictable. Sacramento, CA: Department of Water Resources.


University of California, Santa Barbara, CA.Department of Water Resources (DWR). Precipitation decreases from north to south.In California annual precipitation amounts vary greatly within and between years. Because 50 to 75 percent of annual rangeland forage production occurs in March and April, spring precipitation has a large influence on total annual forage production.

Journal of Range Management, 28: 327-329.Fritts, H.C. and G.A. As a result, areas with this climate receive almost all of their precipitation during their winter season, and may go anywhere from 4 to 6 months during the summer without significant precipitation.These Mediterranean climate types are classified under the Köeppen climate classification system (Kottek et al. It is these two influences that have the largest effect on California’s climate as whole. The climate of the annual rangelands is Mediterranean, with precipitation falling primarily between October and May, mostly as rain (Fig. Foothill oak-woodlands generally occur at an elevation of 200 to 2300 feet (61 to 700 m).Fig. 3). 543. Reconstructed statewide precipitation index (in) for California showing an                   extended dry period from 1760 to 1830. On average foothill oak-woodland precipitation ranges from 15 to 32 inches (38 to 81 cm). The growing season starts with the first germinating rains in the fall and ends when soil moisture is depleted at the beginning of the dry season.Fig. 1978. The frequency of these storms decreases from north to south. Additionally start and end dates of the rainy season are variable. 42(6):508-513.George, Mel, Jim Bartolome, Neil McDougald, Mike Connor, Charles Vaughn and Gary Markegard. 1969-70). 62pKottek, M., Grieser, J., Beck, C., Rudolf, B., and Rubel, F. 2006. 1955-56, 1940-41, 1957-58, 1994-95 (Fig.


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