Tillage effects on selected soil physical properties

dc.contributor.author Hill, Robert
dc.contributor.department Agronomy
dc.date 2018-08-15T06:36:11.000
dc.date.accessioned 2020-07-02T06:02:37Z
dc.date.available 2020-07-02T06:02:37Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 1984
dc.date.issued 1984
dc.description.abstract <p>A study was conducted to determine the effect of conservation and conventional tillage on soil bulk density, soil strength, soil water retention, and pore size distribution. Two locations, each having randomized block designs with 3 replications of continuous corn plots under no-tillage, reduced tillage, and conventional tillage, were used. One location, site 1, was in its second year of tillage experimentation, while the other location, site 2, was in its eighth year;Tillage treatment did not have a statistically significant effect on bulk density. Depth had a significant effect on bulk density. Bulk density increased with depth for the 3 tillage treatments at both sites;Tillage treatments had significant effects on soil strength at site 2, but not at site 1. Strength of soils at site 2 under reduced tillage was not significantly different than for soils under no-tillage, but the soils under both of these tillage systems had significantly greater soil strength than conventionally tilled soils. The pattern of differences in soil strength due to tillage treatment was the same at site 1, but the differences were not statistically significant;Reduced tilled soil generally retained a significantly (LSD(,0.05)) larger quantity of water than conventionally tilled soil, but soils under no-tillage were not significantly different from soils under reduced tillage or conventional tillage in their water retention characteristics. Differences in water retention between tillage treatments were not significant at site 2, but trends in the means comparison similar to site 1 were observed. Analysis of variance failed to show significant tillage effects for the pore size distribution regardless of pore radius interval partitioning. Trends indicate that soil tilled conventionally has a larger proportion of its pore size distribution in pores > 15 (mu)m.r compared to the soils under conservation tillage.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/7763/
dc.identifier.articleid 8762
dc.identifier.contextkey 6323711
dc.identifier.doi https://doi.org/10.31274/rtd-180813-5547
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/7763
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/80676
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/7763/r_8423709.pdf|||Sat Jan 15 01:53:28 UTC 2022
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agriculture
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.disciplines Soil Science
dc.subject.keywords Agronomy
dc.subject.keywords Soil physics
dc.title Tillage effects on selected soil physical properties
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
thesis.degree.level dissertation
thesis.degree.name Doctor of Philosophy
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