The overall objective of manure management should be to take as many excretable manure nutrients to the soil and have them used by plants for optimal crop yield. This reduces the need to purchase feed and inorganic fertilizer.
Clean, safe water for consumption, recreation, irrigation, manufacturing, and fish and wildlife habitat is important to Oregonians. Nonpoint source pollution is the major cause of water quality degradation in Oregon.
Spreading livestock and poultry manure on crop and pastureland is a way to reclaim the value of the plant nutrients in manure. This practice is the most popular and widely recommended way to utilize these manures. Nitrogen and phosphorus are the nutrients of greatest value in manure and are the...
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...
This thesis examines the transient and steady-state temperature performance
of a rotary regenerative heat exchanger. In contrast to previous
studies on this problem, fluid flow in the circumferential direction was
considered. Appropriate modeling was included to measure the effect of
carry-over on the differential equations describing mass and energy
conservation....
This study was to determine the common competencies needed in
physical education graduate curricula as perceived by physical
education teachers and other physical educators in Thailand, to
determine if differences existed among three groups of physical
educators on the Importance of Content and Level of Learning of
the selected competencies,...
Seed dormancy is defined as the inability of viable seeds to germinate under conditionsotherwise favorable for germination. Dormancy provides a strategy for seeds to germinateat an appropriate time. Abscisic acid (ABA) is a major hormone involved in the regulationof seed dormancy. To elucidate the molecular mechanisms of dormancy, the twoexperimental...
Respiratory infections caused by nontuberculous mycobacteria (NTM), especially Mycobacterium avium, can lead to progressive, recurrent disease that is refractory to therapy. Bacterial biofilms are intrinsically resistant to a variety of stressors and pressures, including host killing mechanisms and antibiotic therapy. Though it is becoming increasingly evident that NTM biofilms are...
Published January 1988. 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