In 1988 the Tualatin River was designated 'water quality limited' by the Oregon Department of Environmental Quality. Three sources of pollution: urban point source, forestry non-point source and agricultural non-point source pollution were considered to contribute unacceptable levels of nutrients (phosphates and ammonium nitrates) to the river. Since a significant...
In the production of vegetable crops, good fertilizer usage is only one of the important management practices, including proper seeding, pest control, adequate irrigation, and timely harvest. Because of the influence of soil type, climatic conditions, and other cultural practices, crop response from fertilizer may not always be predicted accurately....
This publication discusses the environmental requirements of needle diseases, their potential impact on tree vigor, when disease levels signal a problem, and what you can do to minimize damage.
Beef production is a large and important segment of
American agriculture and one of the largest industries in the
world. Beef enterprises work well with grain, orchard,
vegetable, or other crop operations. Cattle can make efficient
use of feed resources that have little alternative use,
such as crop residues, marginal...
Published January 2000. 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
The typical home lawn is an evolving ecosystem that gets more complex each year. At first, it consists of one or two grass species found in a typical seed mix (e.g., Kentucky bluegrass and perennial ryegrass). Over time, it evolves to three or four species that were not part of...
These annual legumes are grown for seed and forage in western Oregon. They may respond to applications of fertilizers and lime. The fertilizer and liming needs can be estimated through the use of soil tests. Good management practices are essential if optimum fertilizer responses are to be realized. These practices...
Published May 2000. 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
Published February 2000. 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
To become a 4-H Geologist, you must be interested in the earth, its rocks and land forms, and the natural things in the outdoors. You must agree to attend 4-H meetings, cooperate with your club leader and the other members of your club, and do your best to complete your...
In the heat of summer in the Rogue Valley, yellow starthistle (Centaurea solstitialis) raises heads of brilliant yellow flowers rigidly defended by sharp spines. Although bees reap double benefits of nectar and pollen during a season when most native plants no longer are flowering, this nonnative weed is a threat...
This publication highlights hand-scalping, mulch mats, and herbicides as weed management methods to improve conifer seedling survival and growth. The focus here is on grass dominated environments. All these methods are in use on small woodland properties. Other weed control methods, including grazing and manual brush removal, are discussed in...
Published March 2000. 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 focusses on how riparian areas can be improved to enhance water quality and salmon habitat.
Reprinted April 2000. 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
The most common wastewater treatment system used in rural areas is the septic tank-soil absorption system. The septic tank removes settlable and floatable solids from the wastewater, and the soil absorption field filters and treats the clarified septic tank effluent. Removing the solids from the wastewater protects the soil absorption...
A key problem faced by managers is how to allocate scarce resources
among activities or projects. Linear programming, or LP, is a method of
allocating resources in an optimal way. It is one of the most widely used operations research (OR) tools. It has been used successfully as a decisionmaking...
These recipes are intended for a limited-income, low-literacy, Spanish-speaking audience and have been part of a series of interactive, hands-on classes. Recipes were tested for years in the OFNP (Oregon Family Nutrition Program) Hispanic Office, Multnomah County, Portland, OR. Learners have appreciated receiving the recipes and the simplified format that...
Mastitis is the single most expensive disease to the dairy industry, contributing to large financial losses due to decreased quantity and quality of milk. It's essential to develop and implement a mastitis
control program to keep mammary glands healthy and reduce infection in the herd. Removing the hair from a...
Published June 2000. 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
Communities across the United States are becoming more culturally and ethnically diverse. Indeed, demographers predict that by 2030 most of America’s school-age children will be from a minority group and by 2050, so will most Americans. This increasing diversity changes the nature of the population served by volunteer-based organizations, and...
Published June 2000. 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
Nitrogen application, either from commercial fertilizers such as ammonium sulfate or from organic sources such as fish waste, is
essential for cranberry production. This publication addresses the amount, timing, and source of nitrogen (N) for bearing cranberry beds in North America. The information provided about the pathways
of N in...
This pest of meadowfoam is a small fly in the family Drosophilidae. It has been identified tentatively as Scaptomyza apicalis Hardy. It is
commonly referred to as the meadowfoam fly (MFF). It occurs throughout the Willamette Valley in most commercial plantings of meadowfoam
(Limnanthes alba). Thus far, meadowfoam is the...
Moles belong to the mammalian order Insectivora,
the insect eaters. Often, however, they are lumped
incorrectly with the rodents, which include mice, rats,
squirrels, and other gnawing mammals in the order Rodentia.
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
Use this sheet for your 4-H diary and story. Tell about the interesting things you do and the important things you learn. Write about things when they happen so you won’t forget. Include all of your 4-H projects and activities. Be sure to include what you do in health, safety,...
Revised January 1996. Reprinted July 2000 (with author information updated). Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
This record will be your summary of 4-H work done in all projects for every year you are in 4-H. It will be useful to you to know how much you have accomplished. It could be helpful when you are filling out other forms for 4-H, school, other youth programs,...
Reprinted July 2000. 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
Geology (Geo, Geos = the earth) is a science that deals with the history of the earth and its life as recorded in the rocks. Geology utilizes the principles of physics, chemistry, astronomy, zoology, botany, and others in its studies. There are many specialties or fields of study in geology,...
Published July 2000. Reprinted July 2001. 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