WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Monday, September 24, 2018

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Search results on 09/24/18

3945. Mahler, R.L.. 1981. Implications of acidification of farmland in northern Idaho.. ID Agr. Expt. Sta. CIS #629.
Loss of Ca and Mg is primarily by crop removal in northern Idaho; wheat crop removes 20-50 lb/ac/yr of each cation; ammonium-based fertilizers have been main acidifying factor; had been a big change in past 25 yrs; large % of soils now below pH 6.0; current wheat varieties in Idaho acid intolerant; soil acidity may favor certain weeds and diseases.

11026. Anon.. 1990. Lime application - no-till/minimum till in the PNW.. Bumper Times Special Edition, Spokane, WA. 1/31/90, p. 3.
Dr. Tim Murray, WSU, found that increasing soil pH in the top 3" of soil lowers cephalosporium stripe potential. At pH 5.6, wheat infection was 80% and it declined steadily with liming to just 10% at pH 7.0. About 2.5 tons/ac high grade lime is required to modify pH from 5.3 to 6.0 in Palouse soils.

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