Abstract
Conservation tillage and cover crops are useful tools in Brazil for restoring degraded soils that resulted from the rapid expansion of agriculture without proper management during the 1970s. In 1985, a long-term study was initiated on a degraded Paleudult in the state of Rio Grande do Sul to better understand the impact of these soil management practices on nitrogen (N) dynamics in corn production systems. The systems include both conventional and no-tillage with oat/com, vetch/corn and oat + vetch/corn, + cowpea (intensive). After nine years, no-tillage with the intensive cropping system resulted in a 24% increase in soil N as compared to conventional tillage; there was no difference in corn yield between tillage systems.
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Claims 2
Claim · model-written summary
No-tillage under intensive cropping increased soil nitrogen by 24% relative to conventional tillage after nine years.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- no-tillage with the intensive cropping systeme0
- Outcome
- soil Ne0
- Direction
- increasee0
- Value
- 24%e0
- Comparator
- conventional tillagee0
- Setting
- Rio Grande do Sule1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After nine years, no-tillage with the intensive cropping system resulted in a 24% increase in soil N as compared to conventional tillage”
e1“Rio Grande do Sul to better understand the impact of these soil management practices on nitrogen (N) dynamics in corn production systems”
Claim · model-written summary
Corn yield did not differ between tillage systems.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- tillage systemse0
- Outcome
- corn yielde0
- Direction
- no differencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no difference in corn yield between tillage systems”
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.