Reprinted March 1997. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Rhododendrons and blueberries are popular
plants in home gardens in western Oregon and
Washington. Both are easy to grow in most
gardens, but problems with growth can occur if
the soil is not sufficiently acidic. Even in the
naturally acidic soil west of the Cascade Mountains,
soil often is not...
This publication is a technical and practical guide for soil acidification in commercial fields. It explains the soil chemistry involved, how to determine whether pH adjustment is feasible, and methods for acidifying soil. This guide is divided into five sections:
• Understanding soil pH
• The problem—iron chlorosis
• Causes...
Soil acidification sometimes is necessary for optimum plant growth
west of the Cascade Mountain Range. Commercial producers of
blueberries, azaleas, rhododendrons, and other ornamentals may
need to reduce soil pH for optimum production.
Soil acidification is best performed prior to planting; it is much
more difficult in established plantings. No...
Annual ryegrass varieties such as ‘Gulf’ are grown for seed on poorly drained soils of the south Willamette Valley, including Dayton, Concord, and Bashaw. Recommendations in this guide are based on research throughout this production area. Management practices from seedbed preparation to harvest must be performed in an appropriate and...
Discusses nutrient management and fertilizer recommendations for lime, nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, chloride, and micronutrients on annual ryegrass grown for seed. Includes discussion of research and explanation of nutrient management recommendations.
Revised May 1989. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
This publication describes how to estimate lime application rate and lists criteria for choosing liming materials (source), lime application method (placement), and how often to apply lime (frequency).
This is a fertilizer guide for commercial wholesale nurseries that produce shade and flowering trees for bareroot sales. Reviewed October 2010. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published 1991. Reprinted October 1997. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog