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Sunday, April 22, 2018

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10307. Guldan, S.. 1991. Progress report, Substituting legumes for fallow in U.S. Great Plains wheat production.. Carrington Research Station, North Dakota State Univ., Carrington, ND.
Black medic could be most useful as a substitute for fallow in eastern and central North Dakota if increased winter-hardiness were introduced into the germplasm and if seed costs were reduced. It would work best when grown as a biennial. Hard seed is produced to provide self-seeding. Medic used less soil moisture below two feet depth than sweetclover and hairy vetch.

602. Badaruddin, M., and D.W. Meyer. 1989. Forage legume effects on soil nitrogen and grain yield, and nitrogen nutrition of wheat.. Agron. J. 81:419-424.
Five forage legumes (annual alfalfa, perennial alfalfa, sweetclover, red clover, and hariy vetch) were evaluated as possible replacements for summerfallow in the northern Great Plains. Hard red spring wheat was grown after all plowdowns, and after wheat, and a fallow check. Legume species were not significantly different in hay yields, and root and crown N content across environments, although alfalfa and sweetclover had 35-83% greater N contents than other species. Soil nitrate N in the spring following legumes was greater than following fertilized wheat, but less than following fallow across environments. Grain yield and N uptake of wheat following forage legumes generally were equal to those following fallow, but greater than those following wheat. These results suggest that including 1-yr forage legumes in crop sequence would be a better option than fallow in the higher moisture areas. T: N content of forage leguems; wheat yields as influenced by previous crop; N efficiency

2607. Hilander, S. (ed.). 1989. Proceedings of AERO's soil building cropping systems conference. December 7-9, Lewistown, MT. AERO, 44 N. Last Chance Gulch #9, Helena, MT 59601.
Summarizes the talks given at the conference. Much information is from Canadian researchers in Saskatchewan who are working on low water use legumes as fallow replacements.

4612. Muehlbauer, F.J.. 1990 Jan.. Pulse crops for drier areas.. presentation at Dryland Extension Agent Training, WSU, Pullman, WA.
For the 14-16" rainfall zone, two pulse crops may be suitable as fallow replacements - the small red lentil and the desi chickpea. The desi chickpea has no insect pest at this time, and does not require seed treatment. It is primarily sold to the export market.

7907. Sims, J.R.. 1988. Dryland legume-cereal rotations for the Northern Great Plains-Intermountain region. p. 17-19. IN: S.K. Hilander (ed.). Proc. AERO/MSU Soil Building Cropping Systems Conference, Dec. 1988.

10297. Sims, J.. 1992. Project report, low-input legume/cereal rotations for the Northern Great Plains-Intermountain region.. Dept. of Plant and Soil Sci., Montana State Univ., Bozeman, MT 59717.
Two cycles of the Indianhead lentil green manure/wheat rotation have been completed, using controlled water use management. Wheat yields were greater for the intermediate water use at all sites when compared to all other treatments and both controls. Water use efficiency for legumes was as follows: winter pea > black medic > Cahaba white vetch = sweetclover > Indianhead lentil. Winter peas appear to be more efficient N producers than the lentil. N was apparently still being released from a 1988 plowdown when measured after another 1990 plowdown. Of 19 annual legumes, only Robinson snail medic produced wheat yields superior to fallow and equal to fallow plus 80N. Winter wheat yields from the 1990 large-seeded legume plots were all greater than yields after fallow and slightly less than fallow plus 40N. In on-farm demonstrations with legumes, malting barley quality factors were enhanced by a green manure crop.

10786. Biederbeck, V.O.. 1988. Replacing fallow with annual legumes for plowdown or feed.. Proc. Crop diversification in sustainable agriculture systems, Univ. Sask., Saskatoon. p. 46-51.
Saskatchewan researchers tested several legumes as possible fallow replacements. Inoculation greatly improved growth and water use efficiency of the legumes, with an average of 2000 lb/ac dry matter and water use efficiency of 1490 lb H2O/lb DM. Legumes fixed an average of 44 lb N/ac. Chickling vetch performed the best, but since wheat yields were similar after all species, Indianhead lentil proved to be the most economic choice.

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