
Agricultural and Biosystems Engineering Publications
Campus Units
Agricultural and Biosystems Engineering
Document Type
Article
Publication Version
Published Version
Publication Date
8-2-2018
Journal or Book Title
Soil Science Society of America Journal
Volume
82
Issue
4
First Page
910
Last Page
918
Research Focus Area(s)
Land and Water Resources Engineering
DOI
10.2136/sssaj2017.12.0415
Abstract
Monitoring soil health indicators (SHI) will help ensure that corn (Zea mays L.) stover harvest is sustainable. This study examines SHI changes after 5 yr of growing continuous corn with either chisel plow or no-tillage practices and harvesting 0, ∼35, or ∼60% of the stover. Two no-tillage treatments with a cereal rye (Secale cereale L.) cover crop and stover harvest rates of ∼35 or ∼60% were evaluated. All eight treatments were replicated four times in a randomized complete block design at an 11-ha site in Boone County, IA. Soil samples were collected following grain and stover harvest from 0- to 5- and 5- to 15-cm depth increments. Particulate organic matter C (POM-C) decreased when stover was removed or the soil was chisel plowed. No-till with 0% stover removal had 10 mg g–1 POM-C in the 0- to 5-cm soil layer, which was 1.9-fold higher than in other treatments. Potentially mineralizable N (PMN) was greater under cover crop treatments. Average PMN values were 56.9 and 45.5 µg g–1 PMN for no-till with cereal rye at 0- to 5- and 5- to 15-cm depths, respectively, compared with 17.5 and -3.7 µg g–1 PMN for the same no-till treatments without cereal rye. Other soil properties did not respond to increasing levels of stover removal. At this location and at the studied removal rates, 5 yr of harvesting corn stover did not decrease soil health, but POM-C data suggest that changes may be occurring. Long-term monitoring should continue to assess corn stover harvest sustainability.
Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Recommended Citation
Obrycki, John F.; Karlen, Douglas L.; Cambardella, Cynthia A.; Kovar, John L.; and Birrell, Stuart J., "Corn Stover Harvest, Tillage, and Cover Crop Effects on Soil Health Indicators" (2018). Agricultural and Biosystems Engineering Publications. 1099.
https://lib.dr.iastate.edu/abe_eng_pubs/1099
Comments
This article is published as Obrycki, John F., Douglas L. Karlen, Cynthia A. Cambardella, John L. Kovar, and Stuart J. Birrell. "Corn Stover Harvest, Tillage, and Cover Crop Effects on Soil Health Indicators." Soil Science Society of America Journal 82, no. 4 (2018): 910-918. DOI: 10.2136/sssaj2017.12.0415.