♣ Washington State Compost Educator’s Guide (Request pdf e-copy), Wescott, H., A. Washington State University Extension Bulletin EB1784E. ♣ Backyard Composting (PDF-Online), Cogger, G., D.M. This publication focuses on selecting a lab to perform compost analyses, determining which compost analyses are most relevant to your needs, assessing whether compost is sufficiently stabilized, and avoiding over application of composts high in soluble salts or composts with a pH unsuited to your crop. Compost can return nutrients and organic matter to the soil, a proven practice for soil health enhancement. Oregon State University Extension Bulletin EM9217. ♣ Interpreting Compost Analyses (PDF/HTML-Online), Sullivan, D.M., A.I. ♣ Cornell Composting, educational materials, programs, links. ♣ The Art and Science of Composting, (pdf) Univ. ♣ Washington Organic Recycling Council, information, training, events. ♣ Washington State Department of Ecology, Composting, Siting and Operating Compost Facilities in Washington State publication, & other publications and resources. ♣ Oregon State University Department of Crop & Soil Science, compost resources. The Excel file version also calculates material bulk density and free air space. You can use the spreadsheet or App to evaluate the effects of different feedstock mixtures on C:N ratio and moisture content of the initial pile. The Compost Mix Calculator version 2.1 is an Excel xls spreadsheet (for computers) or an Online App (for tablets or phones) that calculates compost mixture C:N ratio and moisture content, based on the analysis of your feed stocks and the mixture proportions that you choose. Facts and background about the Clopyralid contamination problem. How to calculate bulk density of composts and compost- type materials such as manures and yard waste. ♣ Food Waste Compost Earthtub Composting Project. Small on-site composter used to compost school lunch program food waste as well as educate students. How to sample and prepare your compost to send to a laboratory for analysis, how to choose a laboratory, how to decipher laboratory results. Yard trimmings are organic materials such as lawn clippings, leaves, and pruned material that is applied, without any processing, directly to soil to be amended. ♣ Compost Operators Training at WSU Puyallup: Training and certification for Compost Facility Operators, Managers, and officials involved with Composting. We have evaluated effects of compost applications on nitrogen availability and soil properties. Composts do affect available nutrient levels in soil, often causing short term immobilization (tie-up) of nitrogen, but a long term slow release. Above-Research on various vegetation types on rain garden effectiveness at WSU Puyallup.Ĭomposting stabilizes organic wastes, reducing nutrient availability, allowing their use at high application rates as a soil amendment. Above-demonstration rain garden at WSU Puyallup. ♣ Soil and Redosier Dogwood Response to Incorporated and Surface-Applied Compost (Request pdf e-copy). ♣ Urban Highway Roadside Soils and Shrub Plantings are Enhanced by Surface Applied and Incorporated Organic Amendments (Request pdf e-copy). It included a comparison of surface-applied and incorporated compost in a woody landscape established on converted agricultural land (2001-2006), and a project comparing surface-applied and incorporated compost and biosolids products applied to cut and compacted subsoils within a highway roadside landscaping zone (2007-2010). Our research has focused on compost amendment of landscape soils to improve soil quality and plant growth. Urban soils in areas affected by development are frequently compacted, cut, and filled, resulting in a poor environment for plant growth and increased risk of runoff and harm to the aquatic environment.
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