Simulating Corn Yields for Two Iowa Soils

dc.contributor.author Kanwar, Rameshwar
dc.contributor.author Melvin, Stewart
dc.contributor.author Kanwar, Rameshwar
dc.contributor.author Sanoja, Jose
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-17T06:10:59.000
dc.date.accessioned 2020-06-29T22:41:59Z
dc.date.available 2020-06-29T22:41:59Z
dc.date.copyright Sat Jan 01 00:00:00 UTC 1994
dc.date.issued 1994
dc.description.abstract <p>Corn yields in Iowa often could be improved with better water table management practices, but many soils in this region do not have adequate information about their yield potential. This study was conducted to evaluate the applicability of DRAINMOD in simulating crop yields for artificially drained soils of central and northeastern Iowa. Ten years of field data on crop yields from two drainage experimental sites in Iowa were used to compare relative crop yields with yields predicted by DRAINMOD. Data on saturated hydraulic conductivity, soil-moisture tensions, soil infiltration, and other physical properties were collected either at the experimental sites or in the laboratory on disturbed soil samples. Data on upward flux and infiltration constants for the Green and Ampt equation were calculated by using the infiltration data and soil-moisture retention characteristics of the surface layer. Relative crop yields predicted by DRAINMOD were reasonably close to the observed relative yields for both Iowa sites. Standard error of the estimates of relative yields was 17.41% and the average deviation was 12.99%. The coefficient of determination, r2, between the predicted and measured yields was 0.54. Overall performance of the model suggests that DRAINMOD can be used successfully for predicting yields for different locations if data on site characteristics, soil-water properties, and plant growth functions are available.</p>
dc.description.comments <p>This article was published in Applied Engineering in Agriculture. 10(3): 373–379, doi:<a href="http://dx.doi.org/10.13031/2013.25866" target="_blank">10.13031/2013.25866</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/702/
dc.identifier.articleid 1974
dc.identifier.contextkey 7849468
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/702
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1497
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/702/1994_Kanwar_SimulatingCorn.pdf|||Sat Jan 15 01:40:55 UTC 2022
dc.source.uri 10.13031/2013.25866
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.disciplines Hydrology
dc.subject.disciplines Water Resource Management
dc.subject.keywords Water table management
dc.subject.keywords Artifically drained soils
dc.subject.keywords Computer simulation
dc.subject.keywords Corn Yields
dc.title Simulating Corn Yields for Two Iowa Soils
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 5210e67e-b8da-4e17-be3f-843a09381196
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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