Abstract
The objective of this research was to investigate the effects of three methods of deep tillage of compacted reclaimed mine soil on corn (Zea mays L.). Moldboard plowing (0.5-m depth), slip-plowing (0.7-and 1.0-m depths), and subsoiling (0.7− and 1.0-m depths) on test plots were compared with a no-deep-tillage check treatment. During the 1982 growing season, no significant differences in corn yield among the tillage treatments were observed. Instead, corn yields were strongly associated with the microtopography of harvest plots. Yields were reduced in concave positions where standing water had collected during critical periods of the growing season. The spatial variability of corn yields at the experimental site was characterized by geostatistical techniques. The weak expression of tillage-induced drift in the semivariograms that were constructed for different parts of the research area confirmed that tillage treatment effects on corn yield were insignificant. The semivariograms also revealed that spatial variability patterns of yield greatly varied for different regions of the site. An isarithmie corn yield map produced by kriging graphically illustrated the effect of microtopography on yield.
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Claims 6
Claim · model-written summary
Corn yield did not differ significantly among deep tillage treatments.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- tillage treatmentse0
- Outcome
- corn yielde0
- Direction
- no significant differencese0
- Qualifier
- 1982 growing seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the 1982 growing season, no significant differences in corn yield among the tillage treatments were observed.”
Claim · model-written summary
Corn yield was strongly associated with harvest-plot microtopography.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- corn yieldse0
- Setting
- microtopography of harvest plotse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn yields were strongly associated with the microtopography of harvest plots.”
Claim · model-written summary
Corn yields were reduced in concave positions where water accumulated during critical growing periods.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- Yieldse0
- Direction
- reducede0
- Qualifier
- standing water had collected during critical periods of the growing seasone0
- Setting
- concave positionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields were reduced in concave positions where standing water had collected during critical periods of the growing season.”
t0“CORN YIELD”
t1“CORN YIELD”
Claim · model-written summary
Semivariograms confirmed negligible tillage effects on corn yield.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- tillage treatment effects on corn yielde0
- Direction
- insignificante0
- Comparator
- different parts of the research areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The weak expression of tillage-induced drift in the semivariograms that were constructed for different parts of the research area confirmed that tillage treatment effects on corn yield were insignificant.”
t0“CORN YIELD”
t1“CORN YIELD”
Claim · model-written summary
Corn-yield spatial variability patterns differed substantially among site regions.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- spatial variability patterns of yielde0
- Setting
- different regions of the sitee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spatial variability patterns of yield greatly varied for different regions of the site.”
t0“CORN YIELD”
t1“CORN YIELD”
Claim · model-written summary
A kriged corn-yield map illustrated the microtopographic yield effect.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- effect of microtopography on yielde0
- Comparator
- microtopographye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An isarithmie corn yield map produced by kriging graphically illustrated the effect of microtopography on yield.”
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
- positive
- positive
- positive
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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.