- Author: Jeannette E. Warnert
Many forest areas burned by wildfires this year are now facing a new threat – erosion. A UC Agriculture and Natural Resources expert says there are steps landowners can take to reduce the risk of losing soil and polluting waterways when rain falls.
“The loosened soil and ash can move quickly under proper storm conditions,” said Greg Giusti, a UC ANR Cooperative Extension forestry advisor. “Property owners should take immediate action.”
A longstanding practice in the West has been spreading grass seed after a fire, however, the seed is slow to germinate and grow during the cold months that follow fire...
- Author: Rebecca Miller-Cripps
- Contributor: Wendy West
Many funding sources for weed eradication have been reduced or completely eliminated. According to the California Assembly Budget Committee’s annual Preliminary Review of the Governor’s Proposed 2012-13 State Budget, the California Department of Food and Agriculture will absorb a permanent budget reduction of $12 million in program cuts, in addition to a $19 million budget reduction in 2011-12. Funding for weed management areas (WMAs) has been reduced to the point that many WMAs have become inactive or are being managed voluntarily as an adjunct to other duties.
At the California Invasive.../span>
- Author: Chris M. Webb
Soil erosion threatens our ability to feed ourselves in the future. Current concerns regarding soil erosion include economic vitality, environmental quality and human health.
How can losing a little soil to erosion be such a concern? Soil formation is a very slow process. It takes nature between 300 to 1,000 years to replace soil lost over a 25-year period at a loss rate of 1 mm per year (25 mm is approximately 1 inch)
Erosion reduces the productivity in several ways: Plants are not able to use nutrients as efficiently, seedlings are damaged, rooting depth is decreased, soil’s water-holding capacity is diminished, permeability is decreased, runoff increases and the infiltration rate declines. The loss of healthy soil...
- Author: Chris M. Webb
In the early 1800s, European immigrants introduced the fast-growing giant reed arundo (Arundo donax) into California to use the canes for musical instruments. The plants were also used for erosion control and the reeds used for thatched roofing. However, it has since naturalized and become a serious pest in the state's natural waterways.
Arundo can grow at a rate of four inches per day and can reach heights of 30 feet. It reproduces and spreads when sections of the stem or root break off and float downstream.
Dense stands of arundo displace native riparian species. The plant requires a significant amount of water, reducing fish, wildlife and people. In addition, clumps of arundo and the soil around their roots...