REFERENCES
- Dobbs , T. L. 1995 . “ Other studies compare conventional and sustainable profitability, Sidebar 6–1 ” . In Planting the Future: Developing an Agriculture that Sustains Land and Community Edited by: Bird , E. A.R. , Bultena , G. L. and Gardner , J. C. 94 – 96 . Ames : Iowa State University Press .
- Dobbs , T. L. and Smolik , J. D. 1994 . “ Long-term productivity and profitability of conventional and alternative farming systems in east-central South Dakota: A case study. ” . In Economics Research Report 94–5. Brookings : Economics Department, South Dakota State University . November
- Dobbs , T. L. , Smolik , J. D. and Mends , C. 1991 . “ On-farm research comparing conventional and low-input/sustainable agricultural systems in the Northern Great Plains, Ch. 15 ” . In Sustainable Agriculture Research and Education in the Field: A Proceedings Edited by: Rice , B. J. 250 – 65 . Washington, D.C. : National Academy Press . Board on Agriculture, National Research Council. pp
- Hassebrook , C. , Bird , E. A.R. , Bultena , G. L. and Gardner , J. C. 1995 . “ High-return sustainable farms. Sidebar 6–4 ” . In Planting the Future: Developing an Agriculture that Sustains Land and Community 121 – 23 . Ames : Iowa State University Press .
- Lockeretz , W. , Shearer , G. , Klepper , R. and Sweeney , S. 1978 . Field crop production or organic farms in the Midwest. . Journal of Soil and Water Conservation , 33 : 130 – 34 .
- Lockeretz , W. , Shearer , G. and Kohl , D. H. 1981 . Organic farming in the Corn Belt. . Science , 211 ( No. 6 ) : 540 – 46 .
- Painter , K. 1991 . Does sustainable agriculture pay: A case study. . Journal of Sustainable Agriculture , 1 ( No. 3 ) : 37 – 48 .
- Sahs , W. W. and Lesoing , G. 1985 . Crop rotations and manures versus agricultural chemical in dryland grain production. . Journal of Soil and Water Conservation , 40 : 511 – 16 .
- Schumacher , T. E. , Schumacher , J. A. , Machacek , T. A. and Smolik , J. D. 1993 . Soil strength, bulk density, and water content in Alternative Farming Systems Cooperative Studies, 1992 Madison, S.D. Plant Science Mimeo Report. Brookings : South Dakota State University .
- Shearer , G. , Kohl , D. H. , Wanner , D. , Kuepper , G. , Sweeney , S. and Lockeretz , W. 1981 . Crop production costs and returns on Midwestern organic farms: 1977 and 1978. . American Journal of Agricultural Economics , 63 ( No. 2 ) : 264 – 68 .
- Smolik , J. D. , Dobbs , T. L. and Rickerl , D. H. 1995 . The relative sustainability of alternative, conventional, and reduced-till farming systems. . American Journal of Alternative Agriculture , 10 ( No. 1 ) : 25 – 35 .
- Smolik , J. D. , Dobbs , T. L. , Rickerl , D. H. , Wrage , L. J. , Buchenau , G. W. and Machacek , T. A. 1993 . Agronomic, economic, and ecological relationships in alternative (organic), conventional, and reduced-till farming systems. Bulletin 718. Brookings : Agricultural Experiment Station, South Dakota State University . September
- Watt , D. L. 1995 . “ Economic position and performance of sustainable farms, Ch. 6 ” . In Planting the Future: Developing an Agriculture that Sustains Land and Community Edited by: Bird , E. A.R. , Bultena , G. L. and Gardner , J. C. 93 – 130 . Ames : Iowa State University Press .