WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Tuesday, September 25, 2018

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6545. Smith, V.T.. 1948. Green manure crops for Idaho farms.. U. of Idaho Ext. Circ. #105.
Estimates legume N contribution and dollar value: alfalfa - 260 lb N, $40/ac; sweetclover - 160 lb N, $24/ac; clover - 140 lb N, $21/ac; peas/beans - 50lb N, $7/ac; green manure provides nitrogen, improved soil condition, organic matter; results from 10 yr experiment; grow legume seed for cash crop.

11116. Wegner, G.. 1992. The benefits of biosolids.. Wheat Life (April 1992), p. 11-13.
Dryland cereal farmers are beginning to test the value of biosolids (treated sewage sludge) on their fields. Gary Wegner has found that his crop yields are increasing where biosolids are applied, perhaps due to addition of trace elements such as zinc. Also, biosolids add organic matter which improves soil structure and reduces erosion potential. Biosolids are a free source of nutrients for farmers, but not enough are available to cover very many acres each year.

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