Abstract
Tillage system affects many soil parameters that may influence plant growth. This study evaluated the effect of liming on corn ( Zea mays L.) yield and chemical characteristics of a Humic Hapludox (clayey, kaolinitic, goethitic, termic) under both conventional tillage (CT) and no‐tillage (NT) systems. Rates of dolomitic lime, from 0 to 18 t ha −1 , were plowed into the soil in 1992 in southern Brazil; our study was conducted from 1996 through 1999. Lime rate was allocated to subplots, and tillage systems to main plots, in a split‐plot design. Corn yield increased with liming in all years and was higher with CT than with NT in 2 of 3 yr. Averaged across years and systems, liming increased yield by 66%, which ranged from 4.4 to 7.8 t ha −1 . The highest average yield (7.8 t ha −1 ) was obtained at pH 6.5; yields at pH 6.0 or 5.5 were 97 and 89% of the maximum, respectively. Liming reduced soil organic matter (SOM) in both systems, but nutrients (P, K, Ca, Mg, Fe, Cu, Zn, and Mn) remained above sufficiency on all treatments. Aluminum, pH, SOM, and other nutritional parameters did not differ between tillage systems, partly because limestone was initially incorporated in all plots and partly due to dilution effects in the plow layer because sampling was not stratified in small depths. Some soil restriction impaired by absence of plowing, probably increases in bulk density, offset the benefits of NT on plant growth and was responsible for the smaller yield in this tillage system compared with CT.
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 10
Claim · model-written summary
Liming increased corn yield in every year.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- liminge0
- Outcome
- Corn yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn yield increased with liming in all years”
t0“Corn”
Claim · model-written summary
Corn yield was higher with conventional than no tillage in two of three years.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- CTe0
- Outcome
- yieldt0
- Direction
- highere0
- Value
- 2 of 3 yre0
- Comparator
- NTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was higher with CT than with NT in 2 of 3 yr.”
t0“Corn Yield”
Claim · model-written summary
Liming raised mean corn yield by 66 percent.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- liminge0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 66%e0
- Qualifier
- 4.4 to 7.8 t ha −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Averaged across years and systems, liming increased yield by 66%, which ranged from 4.4 to 7.8 t ha −1 .”
t0“Corn”
Claim · model-written summary
Peak mean yield was 7.8 tonnes per hectare at pH 6.5.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- average yielde0
- Direction
- higheste0
- Value
- 7.8 t ha −1e0
- Qualifier
- pH 6.5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest average yield (7.8 t ha −1 ) was obtained at pH 6.5”
t0“Corn”
Claim · model-written summary
Yield at pH 6.0 was 97 percent of maximum.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- yieldse0
- Value
- 97e0
- Qualifier
- pH 6.0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yields at pH 6.0 or 5.5 were 97 and 89% of the maximum, respectively.”
t0“Corn”
Claim · model-written summary
Yield at pH 5.5 was 89 percent of maximum.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- yieldse0
- Value
- 89%e0
- Qualifier
- 5.5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yields at pH 6.0 or 5.5 were 97 and 89% of the maximum, respectively.”
t0“Corn”
Claim · model-written summary
Liming reduced soil organic matter in both tillage systems.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Liminge0
- Outcome
- soil organic mattere0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Liming reduced soil organic matter (SOM) in both systems”
t0“Corn”
Claim · model-written summary
Soil nutrients remained above sufficiency under all treatments.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- nutrientse0
- Direction
- above sufficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nutrients (P, K, Ca, Mg, Fe, Cu, Zn, and Mn) remained above sufficiency on all treatments.”
t0“Corn”
Claim · model-written summary
Aluminum, pH, organic matter, and nutritional parameters did not differ by tillage.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- tillage systemse0
- Outcome
- Aluminum, pH, SOMe0
- Direction
- did not differe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aluminum, pH, SOM, and other nutritional parameters did not differ between tillage systems”
t0“Corn”
Claim · model-written summary
The authors attributed lower no tillage yield to a soil restriction likely involving greater bulk density.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- absence of plowinge0
- Outcome
- smaller yielde0
- Qualifier
- probably increases in bulk densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Some soil restriction impaired by absence of plowing, probably increases in bulk density, offset the benefits of NT on plant growth and was responsible for the smaller yield in this tillage system compared with CT.”
t0“Corn”
The same questions in other papers
lime · soil: chemistry · Zea mays (maize)Results differ
5 papers in the same direction as this paper · 36 in the opposite direction
- positive
- positive
- no effect
38 papers more in this group
See all 42 papers →tillage · soil: chemistry · Zea mays (maize)Positive and negative results
13 papers in the same direction as this paper · 68 in the opposite direction
- positive
- positive
- positive
78 papers more in this group
See all 82 papers →lime · yield · Zea mays (maize)Positive and negative results
184 papers in the same direction as this paper · 31 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- positive
- positive
215 papers more in this group
See all 219 papers →tillage · yield · Zea mays (maize)Positive and negative results
811 papers in the same direction as this paper · 230 in the opposite direction · 57 reporting no difference from an alternative
- negative
- positive
- 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.