HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Shuman, L. M. Articles by Hargrove, W. L. Search for Related Content PubMed Articles by Shuman, L. M. Articles by Hargrove, W. L. Agricola Articles by Shuman, L. M. Articles by Hargrove, W. L.

Effect of Tillage on the Distribution of Manganese, Copper, Iron, and Zinc in Soil Fractions¹

ABSTRACT

The availability of micronutrients is affected by soil properties such as pH, organic matter content, and clay mineralogy. Some of these properties can be altered by tillage. Therefore, a study was conducted to determine the influence of tillage on the distribution of Mn, Cu, Fe, and Zn among soil fractions. Soil samples were taken at the 0 to 2 cm depth from a long-term (8 yr) tillage experiment. The treatments were no-tillage, minimum tillage (fall tillage only), and conventional tillage (spring and fall tillage). Soil samples were fractionated sequentially to determine Mn, Cu, Fe, and Zn in the following fractions: exchangeable, organic, Mn oxide, amorphous Fe oxide, crystalline Fe oxide, and residual. Double acid-extractable P and Zn, organic matter content, and cation exchange capacity were higher in no-tillage treatments than in the other tillage treatments. Tillage had more effect on the distribution of Mn and Fe among fractions than on the distribution of Zn and Cu. No-tillage lowered the Mn in the exchangeable and amorphous Fe oxide fractions and raised Mn in the organic fraction compared to minimum tillage or conventional tillage. Iron in the exchangeable and organic fractions was higher for no-tillage, while amorphous oxide Fe and residual Fe were lower for no-tillage compared to conventional tillage. Both Mn and Fe appeared to be shifted by no-tillage from the oxide and residual forms into the more plant-available exchangeable or organic forms.

¹ Contribution from the Dep. of Agronomy, Univ. of Georgia, Georgia Stn., Experiment, GA 30212. Presented before Div. S-4 of the Soil Science Society of America, Las Vegas, NV, 26 Nov. 1984.

² Associate Professor and Assistant Professor of Agronomy, respectively, Georgia Station, Experiment, GA 30212.

Received for publication December 6, 1984. Accepted for publication February 26, 1985.

This article has been cited by other articles:

				G. J. Schwab, D. A. Whitney, G. L. Kilgore, and D. W. Sweeney Tillage and Phosphorus Management Effects on Crop Production in Soils with Phosphorus Stratification Agron. J., April 11, 2006; 98(3): 430 - 435. [Abstract] [Full Text] [PDF]

				D. D. Tarkalson, G. W. Hergert, and K. G. Cassman Long-Term Effects of Tillage on Soil Chemical Properties and Grain Yields of a Dryland Winter Wheat-Sorghum/Corn-Fallow Rotation in the Great Plains Agron. J., January 3, 2006; 98(1): 26 - 33. [Abstract] [Full Text] [PDF]

				F.E. Rhoton Influence of Time on Soil Response to No-Till Practices Soil Sci. Soc. Am. J., March 1, 2000; 64(2): 700 - 709. [Abstract] [Full Text]