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Washington State University - Puyallup Organic Farming Systems and Nutrient Management

Events and New on Website


Compost Facility Operator Training
18-22 October 2021

Training and certification for Compost Facility Operators, Managers, and officials involved with Composting. Hands on composting, field trips, examination.

New Videos on Organic No-till and Cover Cropping Systems

Extension Publications, Peer Reviewed

  • Garden Fertilizer Calculator (PDF with embedded Excel xlsx-Online). Gardens, lawns, single plants, or short rows: how much fertilizer to add for each? This fertilizer calculator (for both organic and conventional) makes it easy. Cogger, C. 2019. WSU Extension, US Dept. Agriculture. FS324E.
  • Interpreting Compost Analyses (PDF/HTML-Online). Sullivan, D.M., A.I. Bary, R.O. Miller, and L.J. Brewer. 2018. Oregon State University Extension Bulletin EM9217. Compost can return nutrients and organic matter to the soil, a proven practice for soil health enhancement. 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.
  • Biosolids in Dryland Cropping Systems (PDF-Online). Sullivan, D.M., C.G. Cogger, A.I. Bary, and L.J. Brewer. 2018. PNW 716. Pacific Northwest Extension Publication.
  • Soil Nitrate Testing for Willamette Valley Vegetable Production (PDF-Online). Sullivan, D.M., N.D. Andrews, A. Heinrich, E. Peachey, L.J. Brewer. 2019. EM 9221. Oregon St. Univ. Ext. Serv.