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Sunday, January 21, 2018

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5362. Power, J.F. (ed.). 1987. The role of legumes in conservation tillage systems.. Soil Cons. Soc. Amer., Ankeny, IA. 153 pp..
Proceedings of a national conference, University of Georgia, Athens, April 27-29, 1987. Excellent reference for the use of legumes in cropping systems and their compatibility with conservation tillage. Major sections include: the need; germplasm resources; nitrogen source; insects and diseases; cropping practices; weed control; erosion and productivity; economics.

10185. USDA Agricultural Research Service.. 1957. Grasses and legumes for forage and conservation.. Special Report ARS 22-43, USDA-ARS, Washington, D.C..
This report gives a short description of over 50 grass and legume species suitable for conservation use in various parts of the U.S. Generalized maps of adaptation are included that suggest species for the dryland cereal region of the Northwest.

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.

3570. Kent, R.L.. 1957. Conservation crop rotations in the PNW.. J. Soil Water Conservation, 12(6): 269.
Experimental data and observations indicate that crop rotations with grass and legumes is needed in the wheat-pea area. Also of importance are strip croping, contour operation, stubble mulching, early seeding of winter wheat. T: comparison of OM, water loss, soil loss from virgin land and crop land.

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..

7434. Walter, D.T.. 1987. Early studies on the use of legumes for conservation tillage in Nebraska.. IN: J.F. Power (ed.). The role of legumes in conservation tillage systems. p. 9-10.
Describes early research beginning in the 1930s. Surface residues, especially alfalfa, improved soil structure and infiltration. Erosion and runoff from dense, subtilled legume plots was minimal compared to oat or wheat stubble. Sweetclover and alfalfa were the principal legumes. Erosion and excess N mineralization were problems with sweetclover. Subtilling legume residues retarded decomposition and nitrification, increased earthworm casts, and enhanced aggregate stability. When sweetclover decomposed on the surface, 5-10 lb N/ac were lost as NH3, with only a trace lost when residue was plowed under.

10215. McClure, N.R., A.L. Hafenrichter, and J.L. Schwendiman. 1958. Grasses and legumes for conservation farming in north-central Oregon and adjacent areas.. USDA-Soil Conservation Service, Portland, OR..
This publication summarizes the findings of an on-farm plant nursery near Condon, OR, that was set up by the SCS to field test promising drought-tolerant grasses and legumes. Recommended mixtures for various purposes (hay, green manure, conservation) are listed. Yield data for four years are presented as well.

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