Abstract
Intensive mechanized tillage systems, which are widely adopted by farmers, can cause soil disturbances and compromise the agricultural production sustainability. Despite some divergences, the no-tillage system (NT) has been shown to be more environmental and economically sustainable for farming in southern Brazil. The aim of this study was to assess the long-term effects of four soil management systems on soybean yield and agronomic characteristics, in a 14-cropping-season experiment that was established on an Oxisol in the Rio Grande do Sul state, southern region of Brazil. The experiment was carried out in randomized complete block design with three replications. The treatments consisted of four soil management systems: two conservation systems (no-tillage (NT) and reduced-tillage (RT)) and two conventional tillage (disk plowing + disking (DPD) and moldboard plowing + disking (MPD)). The parameters of grain yield, thousand-grain weight, plant height, first pod insertion height, plant stand, and soybean yield components (the number of pods per plant, the number of grains per plant, and the grain yield per plant) were evaluated at crop maturity. During the 14 successive crops, conservation systems provided grain yield and plant agronomic characteristics that were similar or significantly better than to those of conventional tillage in the majority of the cropping seasons. These findings demonstrate that NT and RT are suitable methods in environmental and economic terms, particularly NT, because it has lower production costs by reducing some mechanized operations. The main variations in soybean yield were due to changes in weather conditions that occurred during the study period (172 months), particularly with respect to the impact of water stress on plant development.
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Claims 5
Claim · model-written summary
No-tillage provided grain yield and agronomic characteristics similar to or significantly better than conventional tillage in most seasons.
- Taxon
- soybean
Glycine maxt0 - Treatment
- no-tillage (NT)e1
- Outcome
- grain yield and plant agronomic characteristicse0
- Direction
- similar or significantly bettere0
- Qualifier
- in the majority of the cropping seasonse0
- Comparator
- conventional tillagee0
- Setting
- Rio Grande do Sul state, southern region of Brazile2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conservation systems provided grain yield and plant agronomic characteristics that were similar or significantly better than to those of conventional tillage in the majority of the cropping seasons.”
e1“two conservation systems (no-tillage (NT) and reduced-tillage (RT))”
t0“soybean”
e2“Rio Grande do Sul state, southern region of Brazil”
Claim · model-written summary
Reduced tillage provided grain yield and agronomic characteristics similar to or significantly better than conventional tillage in most seasons.
- Taxon
- soybeanGlycine maxt0
- Treatment
- reduced-tillage (RT)e1
- Outcome
- grain yield and plant agronomic characteristicse0
- Direction
- similar or significantly bettere0
- Qualifier
- in the majority of the cropping seasonse0
- Comparator
- conventional tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conservation systems provided grain yield and plant agronomic characteristics that were similar or significantly better than to those of conventional tillage in the majority of the cropping seasons.”
e1“two conservation systems (no-tillage (NT) and reduced-tillage (RT))”
t0“soybean”
Claim · model-written summary
The authors consider no-tillage suitable environmentally and economically, particularly because it lowers production costs by reducing mechanized operations.
- Taxon
- soybeanGlycine maxt0
- Treatment
- NTe0
- Outcome
- suitable methods in environmental and economic termse0
- Qualifier
- lower production costs by reducing some mechanized operationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NT and RT are suitable methods in environmental and economic terms, particularly NT, because it has lower production costs by reducing some mechanized operations.”
t0“soybean”
Claim · model-written summary
The authors consider reduced tillage suitable environmentally and economically.
- Taxon
- soybeanGlycine maxt0
- Treatment
- RTe0
- Outcome
- suitable methods in environmental and economic termse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NT and RT are suitable methods in environmental and economic terms”
t0“soybean”
Claim · model-written summary
Main soybean yield variations were attributed to weather changes, particularly water stress affecting development.
- Taxon
- soybeanGlycine maxe0
- Outcome
- variations in soybean yielde0
- Qualifier
- the impact of water stress on plant developmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The main variations in soybean yield were due to changes in weather conditions that occurred during the study period (172 months), particularly with respect to the impact of water stress on plant development.”
The same questions in other papers
tillage · yield · Glycine max (soybean)Positive and negative results
263 papers in the same direction as this paper · 100 in the opposite direction · 26 reporting no difference from an alternative
- no effect
- no effect
- positive
386 papers more in this group
See all 390 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.