Abstract
Compaction affects nearly all soil properties and functions, thereby affecting the growth, distribution, and function of roots, and crop productivity. Our objectives in this research were to evaluate the effects of compaction, N fertilization, and soil texture on corn ( Zea mays L.) growth and yield and to determine whether additional N fertilization could compensate for lower yields caused by compaction. Soil was differentially compacted for 3 yr to create two compaction treatments in Year 1 and four in Years 2 and 3; N fertilizer was applied at two rates in Year 1 and four different rates to each compaction treatment in Years 2 and 3; yield was measured in each of the 3 yr, and soil and crop growth properties were measured after 2 and 3 yr. Variation in soil texture across the experimental plots allowed us to partly assess the effects of clay content on the soil and crop response to compaction. Compaction substantially reduced plant growth and productivity; yields were reduced by up to 2.7 Mg ha −1 (33%) and dry matter by 4.1 Mg ha −1 (26%) in compacted soils. Avoiding compaction for a year appeared to allow crop growth and yields to recover. For example, grain yield after two consecutive years of compaction (5.21 Mg ha −1 ) was significantly lower than after 1 yr of compaction followed by no compaction (7.59 Mg ha −1 ). Compaction increased soil strength near the bottom of the plow layer, where a carryover effect of compaction was apparent. Compaction‐induced yield reductions were greatest on soils with more clay and were attributed to adverse soil physical conditions rather than limited N fertility.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Compaction reduced corn yield by up to 2.7 Mg ha −1 (33%).
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- compacted soilse0
- Outcome
- yieldse0
- Direction
- reducede0
- Value
- 2.7 Mg ha −1 (33%)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yields were reduced by up to 2.7 Mg ha −1 (33%) and dry matter by 4.1 Mg ha −1 (26%) in compacted soils.”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Compaction reduced corn dry matter by 4.1 Mg ha −1 (26%).
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- compacted soilse0
- Outcome
- dry mattere0
- Direction
- reducede0
- Value
- 4.1 Mg ha −1 (26%)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yields were reduced by up to 2.7 Mg ha −1 (33%) and dry matter by 4.1 Mg ha −1 (26%) in compacted soils.”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Corn grain yield after two consecutive compaction years was lower than after one year followed by no compaction.
- Treatment
- two consecutive years of compactione0
- Outcome
- grain yielde0
- Direction
- lowere0
- Value
- 5.21 Mg ha −1e0
- Qualifier
- 7.59 Mg ha −1e0
- Comparator
- 1 yr of compaction followed by no compactione0
Not reportedTaxon
Verbatim
e0“grain yield after two consecutive years of compaction (5.21 Mg ha −1 ) was significantly lower than after 1 yr of compaction followed by no compaction (7.59 Mg ha −1 ).”
Claim · model-written summary
Compaction increased soil strength near the bottom of the plow layer.
Not reportedTaxonOrgan / stageComparator
Verbatim
e0“Compaction increased soil strength near the bottom of the plow layer, where a carryover effect of compaction was apparent.”
Claim · model-written summary
Compaction-related corn yield reductions were greatest on soils with more clay.
Not reportedTaxon
Verbatim
e0“Compaction‐induced yield reductions were greatest on soils with more clay”
Claim · model-written summary
The authors attributed compaction-related yield reductions to adverse soil physical conditions.
Not reportedTaxon
Verbatim
e0“Compaction‐induced yield reductions were greatest on soils with more clay and were attributed to adverse soil physical conditions rather than limited N fertility.”
The same questions in other papers
tillage · yield · Zea mays (maize)Positive and negative results
286 papers in the same direction as this paper · 812 in the opposite direction
- no effect
- negative
- positive
1,095 papers more in this group
See all 1,099 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.