Some fertilizer experiments with deciduous forest tree seedlings on several Iowa soils McComb, A.
dc.contributor.department Extension and Experiment Station Publications 2018-02-18T13:33:39.000 2020-06-30T06:58:23Z 2020-06-30T06:58:23Z 2017-06-09 2017-06-09
dc.description.abstract <p>The growth of seedling green ash, American elm, red oak and black locust was studied in relation to nitrogen, phosphorus and potassium fertilization of four Iowa soils. Fertilizers were added to Band C horizon soil materials and growth compared with that obtained on unfertilized surface and sub-soils. The soils employed were the gray-brown podzolic forest Lindley and prairie Clarion, Tama and O'Neill. Factors causing chlorosis on calcareous Clarion C horizon soil were also investigated.</p> <p>Nitrogen was found deficient for growth of ash, elm and oak. Black locust, a legume, did not respond to nitrogen fertilization. As the residual soil nitrogen supply increased, growth response decreased in magnitude. On Tama C horizon soil with residual total nitrogen at 600 pounds per acre the response of American elm to added nitrogen was 600 percent, while on O'Neill soil containing 1900 pounds residual nitrogen responses were small or nil. The evidence suggests that about 2000 pounds total nitrogen per acre is a level above which seedling nitrogen responses could not be expected under average conditions.</p>
dc.identifier archive/
dc.identifier.articleid 1383
dc.identifier.contextkey 10273808
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath researchbulletin/vol29/iss369/1
dc.source.bitstream archive/|||Fri Jan 14 17:40:24 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Forest Sciences
dc.title Some fertilizer experiments with deciduous forest tree seedlings on several Iowa soils
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isJournalIssueOfPublication 1190e303-b15b-4a5c-88c1-2c25a77e6d94
relation.isOrgUnitOfPublication 302bd0e8-f82f-406a-88b5-c8f956b5f77b
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