Blue oak enhance soil quality in California oak woodlands

منو

" Blue oak enhance soil quality in California oak woodlands "
Dahlgren, Randy A.; Horwath, William R.; Tate, Kenneth W.; Camping, Trina J.

Document Type	:	AL
Record Number	:	944733
Doc. No	:	LA7f14856n
Language of Document	:	English
Main Entry	:	Dahlgren, Randy A.; Horwath, William R.; Tate, Kenneth W.; Camping, Trina J.
Title & Author	:	Blue oak enhance soil quality in California oak woodlands [Article]\ Dahlgren, Randy A.; Horwath, William R.; Tate, Kenneth W.; Camping, Trina J.
Title of Periodical	:	California Agriculture
Volume/ Issue Number	:	57/2
Date	:	2003
Abstract	:	Blue oaks create islands of enhanced soil quality and fertility beneath their canopy. The quality of soil beneath the oak canopy is considerably better than that of the grasslands adjacent to the trees. We found evidence of improved soil quality under blue oaks for physical, chemical and biological soil properties. The type of vegetation (oak versus annual grasses) has a much stronger influence on soil organic matter and nutrient pools than does soil parent material. Removal of oak trees results in a rapid deterioration of soil quality with the majority of the loss occurring within 10 to 20 years after tree removal.