What do we know about heavy metals in soil? What do we know about lead exposure through soil and garden plants? What do we know about cadmium and arsenic in soils? What can I do if I’m at risk for heavy metals in my garden soil?
A comprehensive guide to fertilization and nutrient management in Christmas tree fields. Discusses tree nutrient use at various stages in the crop cycle and explains how to use soil and tissue testing to determine...
John M. Hart, Chal Landgren, Richard Fletcher, Michael Bondi, Brad Withrow-Robinson, Gary Chastagner |
Jan 2019 |
Extension Catalog publicationPeer reviewed (Orange level)
A guide for the prospective and novice Christmas tree grower. Includes how to evaluate risk and potential for return. Discusses the tree growing cycle, tasks and time requirements, pertinent laws and regulations, ...
Chal Landgren, Richard Fletcher, Michael Bondi, Dann L. Barney, Ron Mahoney |
Jun 2003 |
Extension Catalog publicationPeer reviewed (Orange level)
This full-color, English and Spanish field guide is for tree growers and field workers. Learn to identify and treat diseases, pests, disorders and damage affecting Christmas trees.
The Extension Service Christmas tree specialist has answered thousands of questions over the years. Those questions usually lead to more questions that require careful observation and a detective's mindset to solve.
Damage assessments after the historic heat wave of June 2021 in Oregon provided lessons for the state's Christmas tree growers. Those assessments showed how damage varied by type of tree and location of farms.
Poisonous plants are a major cause of economic loss to the livestock industry. Two poisonous plants common to Oregon are poison hemlock and Western water hemlock. Ingestion of either by humans or livestock typically results in death.