Abstract
Corn (Zea mays L.) grown following corn, on poorly drained, fine-textured soils, with no-till tends to yield less than with other tillage systems. Surface residues conserved with no-till reduce erosion, thus, techniques must be found to avoid yield reductions. Field experiments were conducted to evaluate use of the Paraplow (Howard Rotovator Co., Inc.), a tillage tool that loosens soil without inversion, for continuous corn production. No-till, chisel plow, moldboard plow, and Paraplow systems were evaluated on three poorly drained, medium- and fine-textured soils in Iowa. All tillage tools reduced bulk density and penetration resistance to the depth of tillage. However, after planting only the soil tilled with the Paraplow remained less dense. Plant residue cover had more effect on corn growth than did soil loosening. Emergence and yield of corn were inversely related to amount of residue on soil surface after planting.
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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 4
Claim · model-written summary
All tillage tools lowered soil bulk density and penetration resistance to tillage depth.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- All tillage toolse0
- Outcome
- bulk density and penetration resistancee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All tillage tools reduced bulk density and penetration resistance to the depth of tillage”
t0“Corn”
Claim · model-written summary
After planting, Paraplow soil alone remained less dense.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Paraplowe0
- Outcome
- soil tilled with the Paraplow remained less densee0
- Direction
- less densee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after planting only the soil tilled with the Paraplow remained less dense”
t0“Corn”
Claim · model-written summary
Plant residue cover affected corn growth more than soil loosening.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Plant residue covere0
- Outcome
- corn growthe0
- Direction
- more effecte0
- Comparator
- soil looseninge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant residue cover had more effect on corn growth than did soil loosening”
Claim · model-written summary
Corn emergence and yield declined as surface residue increased after planting.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- residue on soil surfacee0
- Outcome
- Emergence and yielde0
- Direction
- inversely relatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Emergence and yield of corn were inversely related to amount of residue on soil surface after planting”
The same questions in other papers
tillage · disease · Zea mays (maize)Positive and negative results
32 papers in the same direction as this paper · 18 in the opposite direction · 3 reporting no difference from an alternative
- positive
- negative
- negative
50 papers more in this group
See all 54 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.