Abstract
Abstract The conversion of native grasslands into agricultural land in the Brazilian Pampa biome has intensified land-use change, increasing the need for effective soil management strategies due to potential impacts on crop yield and soil physical and chemical properties. This four-year study evaluated the effects of three soil tillage systems (no-tillage [NT], minimum tillage [MT], and conventional tillage [CT]) on grain yield and soil physical and chemical properties of an Ultisol in the Brazilian Pampa. Crop yields were monitored over four growing seasons (2015–2019) in a randomized block design with three replicates. Soil physical properties were assessed twice during the first growing season and once during the second and fourth growing seasons, whereas the chemical properties were analyzed in the second growing season. In the first growing season, CT and MT resulted in the highest corn yields and less compaction in the 0–5 cm layer, as indicated by lower soil density and higher total porosity and macroporosity. However, by the fourth growing season, NT yielded higher soybean yields (18 and 34% higher than CT and MT, respectively) and less compaction in the 0–5 cm layer. The soil’s chemical properties were not affected by the tillage systems in the short term. Although NT initially tended to lead to lower yields, after four years it offered higher gains in crop yield and improved soil physical properties in the surface layer, highlighting its importance for soil conservation and productivity in the Brazilian Pampa Biome.
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Claims 6
Claim · model-written summary
In the first growing season, conventional and minimum tillage gave the highest corn yields.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- CT and MTe1
- Outcome
- corn yieldse1
- Direction
- higheste1
- Setting
- first growing seasone1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In the first growing season, CT and MT resulted in the highest corn yields”
Claim · model-written summary
In the first growing season, CT and MT gave less compaction in the 0-5 cm layer, with lower soil density and higher total porosity and macroporosity.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- CT and MTe0
- Outcome
- compaction in the 0–5 cm layere1
- Direction
- lesse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CT and MT resulted in the highest corn yields”
e1“less compaction in the 0–5 cm layer, as indicated by lower soil density and higher total porosity and macroporosity”
Claim · model-written summary
By the fourth growing season, no-tillage gave soybean yields 18% higher than conventional tillage.
- Taxon
- soybean
Glycine maxe1 - Treatment
- NTe1
- Outcome
- soybean yieldse1
- Direction
- highere1
- Value
- 18e1
- Comparator
- CTe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“NT yielded higher soybean yields (18 and 34% higher than CT and MT, respectively)”
Claim · model-written summary
By the fourth growing season, no-tillage gave soybean yields 34% higher than minimum tillage.
- Taxon
- soybeanGlycine maxe1
- Treatment
- NTe1
- Outcome
- soybean yieldse1
- Direction
- highere1
- Value
- 34%e1
- Comparator
- MTe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“NT yielded higher soybean yields (18 and 34% higher than CT and MT, respectively)”
Claim · model-written summary
By the fourth growing season, no-tillage gave less compaction in the 0-5 cm layer.
- Taxon
- soybeanGlycine maxe0
- Treatment
- NTe0
- Outcome
- compaction in the 0–5 cm layere1
- Direction
- lesse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NT yielded higher soybean yields”
e1“less compaction in the 0–5 cm layer.”
Claim · model-written summary
Soil chemical properties were not affected by the tillage systems in the short term.
Not reportedTaxonComparator
Verbatim
e1“The soil’s chemical properties were not affected by the tillage systems in the short term”
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