Abstract
Tillage and fertilization methods may affect soil fertility. With the aim of assessing changes in soil chemical properties over a period of ten years, soil samples of a Paleudult were collected over nine seasons at three layer depths (0-5, 5-10, 10-20 cm) and were chemically analyzed. Grain yield and nutrient export in two summer crops, soybean (Glycine max) and corn (Zea mays), in a field experiment set in Eldorado do Sul, in the state of Rio Grande do Sul, Brazil, were determined. Three soil tillage systems were evaluated, conventional (CT), reduced (RT) and no-tillage (NT), combined with mineral (lime and fertilizers) and organic (poultry litter) fertilization. The no-tillage system stood out as compared to the others, especially in the surface layer, in terms of values of organic matter, soil pH, available phosphorus, cation exchange capacity and base saturation. Phosphorus content was higher under organic than mineral fertilization due to the criteria used for the establishment of fertilizer doses. Under organic fertilization, soil pH values were similar to those obtained in limed soil samples because of the cumulative effect of the organic fertilizer. Soybean yield was lower under NT in comparison to the RT and CT systems. Consequently, soybean grain exported a lower content of nutrients than maize grain. Maize yield was not affected by either tillage or fertilization systems.
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Claims 6
Claim · model-written summary
No-tillage increased surface soil chemical fertility measures relative to other tillage systems.
- Taxon
- soybean (Glycine max) and corn (Zea mays)
Glycine max
Zea mayst0 - Treatment
- no-tillage systeme0
- Outcome
- organic matter, soil pH, available phosphorus, cation exchange capacity and base saturatione0
- Direction
- stood oute0
- Comparator
- the otherse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The no-tillage system stood out as compared to the others, especially in the surface layer, in terms of values of organic matter, soil pH, available phosphorus, cation exchange capacity and base saturation.”
t0“soybean (Glycine max) and corn (Zea mays)”
Claim · model-written summary
Organic fertilization produced higher soil phosphorus than mineral fertilization.
- Taxon
- soybean (Glycine max) and corn (Zea mays)Glycine maxZea mayst0
- Treatment
- organice0
- Outcome
- Phosphorus contente0
- Direction
- highere0
- Comparator
- mineral fertilizatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus content was higher under organic than mineral fertilization”
t0“soybean (Glycine max) and corn (Zea mays)”
Claim · model-written summary
Soil pH under organic fertilization was similar to limed soil.
- Taxon
- soybean (Glycine max) and corn (Zea mays)Glycine maxZea mayst0
- Treatment
- organic fertilizatione0
- Outcome
- soil pH valuese0
- Direction
- similare0
- Comparator
- limed soil samplese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under organic fertilization, soil pH values were similar to those obtained in limed soil samples”
t0“soybean (Glycine max) and corn (Zea mays)”
Claim · model-written summary
Soybean yield was lower under no-tillage than reduced or conventional tillage.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- NTe0
- Outcome
- Soybean yielde0
- Direction
- lowere0
- Comparator
- RT and CT systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean yield was lower under NT in comparison to the RT and CT systems.”
Claim · model-written summary
Soybean grain exported less nutrients than maize grain.
- Taxon
- soybeanGlycine maxe0
- Outcome
- soybean grain exported a lower content of nutrientse0
- Direction
- lowere0
- Comparator
- maize graine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean grain exported a lower content of nutrients than maize grain.”
Claim · model-written summary
Maize yield was unaffected by tillage or fertilization systems.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize yield was not affected by either tillage or fertilization systems.”
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