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Comparison of alternative farming systems. III. Soil aggregate stability

Published online by Cambridge University Press:  30 October 2009

J.L. Jordahl  and
D.L. Karlen
J.L. Jordahl
Affiliation:
District Conservationist, USDA-SCS, 100 8th Street South, Humboldt, IA 50548.
D.L. Karlen
Affiliation:
Soil Scientist, USDA-ARS, National Soil Tilth Laboratory, 2150 Pammel Drive, Ames, IA 50011.
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Abstract

Quantitative studies are needed to separate the real and supposed benefits of alternative farming practices. Our objective was to learn how conventional and alternative practices on adjacent farms in central Iowa affected the water stability of soil aggregates. We collected samples of Clarion loam (fine-loamy, mixed, mesic Typic Hapludoll) from adjacent 16 ha fields in fall 1990 and spring 1991. Aggregate stability was determined by wet-sieving and by measuring turbidity of soil-water suspensions. The combined effects of alternative practices resulted in greater water stability of soil aggregates, higher soil organic matter content, and lower bulk density compared with conventional practices. The components of the alternative system that were mainly responsible for these differences were: rotations that included oat and hay crops; ridge-tillage; and additions of 45 Mg/ha of a mixture of animal manure and municipal sludge during the first 3 years of each 5 year rotation. The more favorable soil physical conditions, shown by increased water stability of soil aggregates, presumably will improve soil water regimes and reduce long-term soil erosion losses from the alternatively managed fields.

Keywords

cornsoybeanalternative agriculture
Type
Articles
Information
American Journal of Alternative Agriculture , Volume 8 , Issue 1 , March 1993 , pp. 27 - 33
Copyright
Copyright © Cambridge University Press 1993

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References

1.Bruce, R.R., Langdale, G.W., and Dillard, A.L.. 1990a. Tillage and crop rotation effects on characteristics of a sandy surface soil. Soil Sci. Soc. Amer. J. 54:1744–1747.CrossRefGoogle Scholar
2.Bruce, R.R., Langdale, G.W., and West, L.T.. 1990b. Modification of soil characteristics of degraded soil surfaces by biomass input and tillage affecting soil water regime. In Transactions of the 14th International Congress of Soil Science. International Soil Science Society, Kyoto, Japan, pp. 4–9.Google Scholar
3.Chaney, K., and Swift, R.S.. 1984. The influence of organic matter on aggregate stability in some British soils. J. Soil Sci. 35:223–230.CrossRefGoogle Scholar
4.Churchman, G.J., and Tate, K.R.. 1987. Stability of aggregates of different size grades in allophanic soils from volcanic ash in New Zealand. J. Soil Sci. 38:19–27.CrossRefGoogle Scholar
5.Cochran, W.G., and Cox, G.M.. 1950. Experimental Designs. John Wiley and Sons, Inc., New York, N.Y.Google Scholar
6.Douglas, J.T., and Goss, M.J.. 1982. Stability and organic matter content of surface soil aggregates under different methods of cultivation and in grassland. Soil Tillage Research 2:155–175.CrossRefGoogle Scholar
7.Foster, G.R., Young, R.A., Romkens, M.J.M., and Onstad, C.A.. 1985. Processes of soil erosion by water. In Follett, R.F. and Stewart, B.A. (eds). Soil Erosion and Crop Productivity. Amer. Soc. of Agronomy, Madison, Wisconsin, pp. 137–162.Google Scholar
8.Gee, G.W., and Bauder, J.W.. 1986. Particle-size analysis. In Klute, A. (ed). Methods of Soil Analysis. Part 1. 2nd ed. Agronomy Monograph No. 9. Amer. Soc. of Agronomy, Madison, Wisconsin, pp. 383–411.Google Scholar
9.Jackson, M. 1988. Amish agriculture and no-till: The hazards of applying the USLE to unusual farms. J. Soil and Water Conservation 43:483–486.Google Scholar
10.Jordahl, J.L. 1991. Soil management impact on the water stability of soil aggregates. M.S. Thesis. Iowa State Univ., Ames.Google Scholar
11.Karlen, D.L., and Fenton, T.E.. 1991. Soil map units: Basis for agrochemical-residue sampling. In R.G. Nash and A.R. Leslie (eds). Groundwater Residue Sampling Design. ACS Symposium Series 465. Amer. Chemical Soc., Washington, D.C. pp. 182–194.Google Scholar
12.Kemper, W.D., and Rosenau, R.C.. 1986. Aggregate stability and size distribution. In Klute, A. (ed). Methods of Soil Analysis. Part 1. 2nd ed. Agronomy Monograph 9. Amer. Soc. of Agronomy, Madison, Wisconsin, pp. 425–442.Google Scholar
13.Laflen, J.M., and Moldenhauer, W.C.. 1979. Soil and water losses from cornsoybean rotations. Soil Sci. Soc. Amer. J. 43:1213–1215.CrossRefGoogle Scholar
14.Lee, A.F.S., and Gurland, J.. 1975. Size and power of tests for equality of means of two normal populations with unequal variances. J. Amer. Stat. Assoc. 70:933–941.CrossRefGoogle Scholar
15.Logsdon, S.D., Radke, J.K., and Karlen, D.L.. 1993. Comparison of alternative farming systems. I. Infiltration techniques. Amer. J. Alternative Agric. 8:15–20.CrossRefGoogle Scholar
16.Luk, S.H. 1979. Effect of soil properties on erosion by wash and splash. Earth Surface Processes 4:241–255.CrossRefGoogle Scholar
17.Miller, W.P., and Baharuddin, M.K.. 1986. Relationship of soil dispersibility to infiltration and erosion of southeastern soils. Soil Sci. 142:235–240.CrossRefGoogle Scholar
18.Molope, M.B., Grieve, I.C., and Page, E.R.. 1985. Thixotropic changes in the stability of molded soil aggregates. Soil Sci. Soc. Amer. J. 49:979–983.CrossRefGoogle Scholar
19.National Research Council. 1989. Alternative Agriculture. Board on Agriculture. National Academy Press, Washington, D.C.Google Scholar
20.Oades, J.M. 1984. Soil organic matter and structural stability: Mechanisms and implications for management. Plant and Soil 76:319–337.CrossRefGoogle Scholar
21.Perfect, E., Kay, B.D., van Loon, W.K.P., Sheard, R.W., and Pojasok, T.. 1990. Factors influencing soil structural stability within a growing season. Soil Sci. Soc. Amer. J. 54:173–179.CrossRefGoogle Scholar
22.Pojasok, T., and Kay, B.D.. 1990. Assessment of a combination of wet sieving and turbidimetry to characterize the structural stability of moist aggregates. Canadian J. Soil Sci. 70:33–42.CrossRefGoogle Scholar
23.Reganold, J.P., Elliot, L.F., and Unger, Y.L.. 1987. Long-term effects of organic and conventional farming on soil erosion. Nature 330:370–372.CrossRefGoogle Scholar
24.SAS Institute, Inc. 1985. SAS User's Guide: Statistics, Version 5 Edition. Cary, North Carolina.Google Scholar
25.Tisdall, J.M., and Oades, J.M.. 1982. Organic matter and water-stable aggregates in soils. J. Soil Sci. 33:141–163.CrossRefGoogle Scholar
26.Walter, N.F., Hallberg, G.R., and Fenton, T.E.. 1978. Particle-size analysis by the Iowa State University soil survey laboratory. In Hallberg, G.R. (ed). Standard Procedures For Evaluating Quaternary Materials in Iowa. Iowa Geological Survey, Iowa City. pp. 61–74.Google Scholar
27.Weill, A.N., De Kimpe, C.R., and McKyes, E.. 1988. Effect of tillage reduction and fertilizer on soil macro- and microaggregation. Canadian J. Soil Sci. 68:489–500.Google Scholar
28.Williams, B.G., Greenland, D.J., Lindstrom, G.R., and Quirk, J.P.. 1966. Techniques for the determination of the stability of soil aggregates. Soil Sci. 101:157–163.CrossRefGoogle Scholar
29.Wilson, H.A., and Browning, G.M.. 1945. Soil aggregation, yields, runoff, and erosion as affected by cropping systems. Soil Sci. Soc. Amer. Proc. 10:51–57.CrossRefGoogle Scholar