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Friday, March 23, 2018


Browse on keywords: legume WA tillage

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Search results on 03/23/18

3688. Knight, W.E.. 1987. Germplasm resources for legumes in conservation tillage.. IN: J.F. Power (ed.). The role of legumes in conservation tillage systems. p. 13-19.
Brief summary of legume species grown in the region. Mentions a rotation in the Camas Prairie, ID area of 3 yr alfalfa-WW-SB-AWP. Mentions lupin and chickpea as possible crops in the transition area to substitute for fallow. Mentions sweetclover intercropping with spring barley, with barley yields 85% of normal.

4629. Muehlbauer, F.J.. 1983. Legumes in cropping systems in the Pacific Northwest and California. p. B14-18.. Rreport of the Work-Planning Conf. on Legumes in Conservation Tillage Systems..

5539. Ramig, R.E.. 1987. Conservation tillage systems for green pea production in the Pacific Northwest.. IN: J.F. Power (ed.). The role of legumes in conservation tillage systems. p. 93-94.
Summarizes a 13 yr study of the effects of 4 tillage systems in a pea-winter wheat cropping system on water conservation and use, yields, water use efficiency, and the changes in weed populations. Water storage on land on which wheat stubble was left standing overwinter averaged 10% more than on fall-tilled stubble. There were no significant differences in wheat yields among tillage systems. Weed infestations in peas shifted due to tillage, primarily with lambsquarters. Spring plow was worst. Conservation tillage for a wheat-pea rotation can enhance water conservation, and in dry years can increase pea yields by 20% and wheat yields by 5%. Long-term effects are not consistent due to crop residue influences.

6228. Siddoway, F.H. and H.C. McKay. 1962. Tillage of sweetclover under dryland conditions.. ID Agr. Ext. Service Bull. #388 Combined Series.
Sweetclover used in 2 systems: spring grain - fallow (limited growing season, precip>14"); winter grain - fallow (precip <14", growing season adequate); 3-8 lb/ac biennial Madrid sweetclover; less weed growth after sweetclover kill than on summerfallow after wheat; sweep tillage worked well in dry years; moldboard plow was the most consistent kill; sweep left about 35% of sweetclover residue on surface; higher soil nitrates after moldboard plow; no signficant effect on soil moisture; yield correlated to soil moisture; yields 16-18 bu/ac; no control plots. T: nitrogen, soil moisture, wheat yield.

7242. Veseth, R.. 1989. Reduced tillage for green manure legumes. STEEP Conservation Farming Update, Summer 1989, p. 3-5.
Three tillages were compared for incorporating Austrian winter pea or red clover green manure: moldboard plow plus shallow disk; shallow disk twice; no-till. At each N fertilizer rate, winter wheat yields were slightly higher with reduced tillage than with conventional tillage. A 60 lb/ac N rate substantially increased wheat yields after green manure, while the 120 N rate gave little or no yield increase. With no N fertilizer, the yield of winter wheat after both green manure crops compared favorably with yield of no-till winter wheat after a seed crop of spring peas. Legume N uptake by a following wheat crop was not affected by residue treatment, but recovery of legume N from the soil was about 10% lower with surface application than with soil incorporation. Also, wheat yields after chemically-killed green manures were consistently lower, and could not be fully recovered with fertilizer N. The mechanism of this suppression is not known.

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