Zobrazeno 1 - 10
of 25
pro vyhledávání: '"N McDougald"'
Publikováno v:
California Agriculture, Vol 61, Iss 1 (2007)
In some California locations, the natural regeneration of blue oak is limited by the ability of small seedlings to survive long enough to become larger saplings. This study evaluated the growth and survival of different age classes of seedlings. We f
Externí odkaz:
https://doaj.org/article/9d936a0e3f094ed2a302503aa353ce73
Publikováno v:
California Agriculture, Vol 61, Iss 1 (2007)
Blue oak, a tree native only to California, is notoriously slow-growing, and its low regeneration rate has prompted concern about the species' future survival in some areas of the state. We studied the use of fencing (exclosures) to protect seedlings
Externí odkaz:
https://doaj.org/article/d57690804f3b496888e9b2e7af84783e
Publikováno v:
California Agriculture, Vol 58, Iss 3 (2004)
We conducted a 5-year study on the impact of grazing on stream-channel bare ground and erosion, and a 3-year study of cattle-trail erosion on intermittent stream channels draining grazed oak-woodland watersheds. While the concentration of cattle alon
Externí odkaz:
https://doaj.org/article/a2c0135b404147968f053102e40672d6
Publikováno v:
California Agriculture, Vol 50, Iss 3 (1996)
A 4-year study indicates that native blue oak seedlings are probably much older than most people would think: Trees less than 6 inches tall could be 10 to 15 years old. Seedlings grow very slowly, if at all, during periods of drought. However, seedli
Externí odkaz:
https://doaj.org/article/d15beea442fe45aa84fdc867e19a11a5
Autor:
T Adams, N McDougald
Publikováno v:
California Agriculture, Vol 49, Iss 5 (1995)
Competition from annual herbaceous plants is one of many factors inhibiting establishment of blue oaks in California. Other factors include drought and large and small mammal depredation; gophers are a particularly serious threat to the seedling's em
Externí odkaz:
https://doaj.org/article/4078fa0c0c9c410eb6454b3bb6aab201
Publikováno v:
California Agriculture, Vol 49, Iss 5 (1995)
Acorns from native blue oaks growing in Madera and Kern counties were evaluated for quality in this 2-year study. Acorns from Madera County were larger and more of their seedlings emerged from the soil and at a faster rate than acorns from Kern Count
Externí odkaz:
https://doaj.org/article/149f84ec1be74f949c1389d1dee41eae
Publikováno v:
California Agriculture, Vol 45, Iss 2 (1991)
A recent survey of oak regeneration in four southern Sierra counties found sufficient regeneration of seedlings, but a general shortage of pole-size trees. Managers will need to find ways to encourage oak seedling recruitment into the pole-size class
Externí odkaz:
https://doaj.org/article/d606ac38c00b40f58306c57f9d7288de
Publikováno v:
California Agriculture, Vol 40, Iss 9 (1986)
Varying levels of resistance to pyrethroid cattle ear devices have been found in northern California.
Externí odkaz:
https://doaj.org/article/b9a2a068da8d479590207e6546a0cd29
Publikováno v:
California Agriculture, Vol 43, Iss 3 (1989)
Whole cull pistachio nuts appear to be acceptable to cattle and sheep as part of their daily rations. Research indicates that cattle can be fed up to 20% of the daily ration without refusal, but this may be too high for sheep.
Externí odkaz:
https://doaj.org/article/e97e516641614c4b99adc7a1974ba6e9
Publikováno v:
California Agriculture, Vol 42, Iss 5 (1988)
California annual rangeland pasture is generally poor in the fall and in short supply during winter. To correct deficiencies and maintain acceptable performance, ranchers usually provide supplemental nutrients to the range beef cow herd during the la
Externí odkaz:
https://doaj.org/article/b75aeaf4942a4e8cb8894ba9305a8f94