Abstract
The appropriate chemical management of cover crops in no-tillage aims to obtain greater benefits with its employment in agricultural systems. The objective of this study was to assess upland rice yield as affected by the previous summer crop, species and desiccation timing of cover crops by glyphosate. Sown cover crops were sown (November 2007), followed by rice in half of the experimental area and soybean in the other half (November 2008). After the harvesting of these crops, the same cover crops were sown again (March 2009) and followed by upland rice in the total area (November 2009). The experiment consisted of the combination of five cover crops (fallow, Panicum maximum, Brachiaria ruziziensis, B. brizantha and Pennisetum glaucum), four desiccation timings (30, 20, 10 and 0 days before rice sowing), and two antecedents of the summer crop (rice or soybean) under no-tillage system (NTS), plus two control treatments at conventional tillage system (CTS). Cover crops significantly affect rice grain yield and its components. There is a significant tendency to highest yield when cover crop desiccation is conducted farther from the rice sowing date (from 2,577.1 kg ha-1 - desiccation at rice sowing to 3,115.30 kg ha-1 - desiccation 30 days before rice sowing). Soybean as an antecedent of summer crop allows better upland rice yield (3,754 kg ha-1) than rice as an antecedent of summer crop (2,635 kg ha-1); fallow/soybean/fallow (4,507 kg ha-1) and millet/soybean/millet (4,765 kg ha-1) rotation at no-tillage system, and incorporated fallow /soybean/ incorporated fallow (4,427 kg ha-1) at conventional tillage system allow the highest rice yield; upland rice yield is similar at no-till (3,194 kg ha-1) and till system (2,878 kg ha-1).
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc. 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 7
Claim · model-written summary
Cover crops significantly affected upland rice grain yield and its components.
- Taxon
- rice
Oryza sativae0 - Treatment
- Cover cropse0
- Outcome
- rice grain yield and its componentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cover crops significantly affect rice grain yield and its components”
Claim · model-written summary
Desiccating cover crops 30 days before rice sowing gave higher rice yield than desiccation at rice sowing.
- Taxon
- riceOryza sativae0
- Treatment
- cover crop desiccatione1
- Outcome
- yielde1
- Direction
- higheste1
- Value
- 3,115.30 kg ha-1e1
- Qualifier
- 2,577.1 kg ha-1e1
- Comparator
- desiccation at rice sowinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cover crops significantly affect rice grain yield and its components”
e1“There is a significant tendency to highest yield when cover crop desiccation is conducted farther from the rice sowing date (from 2,577.1 kg ha-1 - desiccation at rice sowing to 3,115.30 kg ha-1 - desiccation 30 days before rice sowing)”
Claim · model-written summary
Soybean as the previous summer crop gave better upland rice yield than rice as the previous summer crop.
- Taxon
- riceOryza sativae0
- Treatment
- Soybean as an antecedent of summer crope2
- Outcome
- upland rice yielde2
- Direction
- bettere2
- Value
- 3,754 kg ha-1e2
- Qualifier
- 2,635 kg ha-1e2
- Comparator
- rice as an antecedent of summer crope2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cover crops significantly affect rice grain yield and its components”
e2“Soybean as an antecedent of summer crop allows better upland rice yield (3,754 kg ha-1) than rice as an antecedent of summer crop (2,635 kg ha-1)”
Claim · model-written summary
Fallow/soybean/fallow rotation under no-tillage gave the highest upland rice yield, 4,507 kg ha-1.
- Taxon
- riceOryza sativae0
- Treatment
- fallow/soybean/fallowe3
- Outcome
- rice yielde3
- Direction
- higheste3
- Value
- 4,507 kg ha-1e3
- Setting
- no-tillage systeme3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cover crops significantly affect rice grain yield and its components”
e3“fallow/soybean/fallow (4,507 kg ha-1) and millet/soybean/millet (4,765 kg ha-1) rotation at no-tillage system, and incorporated fallow /soybean/ incorporated fallow (4,427 kg ha-1) at conventional tillage system allow the highest rice yield”
Claim · model-written summary
Millet/soybean/millet rotation under no-tillage gave the highest upland rice yield, 4,765 kg ha-1.
- Taxon
- riceOryza sativae0
- Treatment
- millet/soybean/millete3
- Outcome
- rice yielde3
- Direction
- higheste3
- Value
- 4,765 kg ha-1e3
- Setting
- no-tillage systeme3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cover crops significantly affect rice grain yield and its components”
e3“fallow/soybean/fallow (4,507 kg ha-1) and millet/soybean/millet (4,765 kg ha-1) rotation at no-tillage system, and incorporated fallow /soybean/ incorporated fallow (4,427 kg ha-1) at conventional tillage system allow the highest rice yield”
Claim · model-written summary
Incorporated fallow/soybean/incorporated fallow under conventional tillage gave the highest upland rice yield, 4,427 kg ha-1.
- Taxon
- riceOryza sativae0
- Treatment
- incorporated fallow /soybean/ incorporated fallowe3
- Outcome
- rice yielde3
- Direction
- higheste3
- Value
- 4,427 kg ha-1e3
- Setting
- conventional tillage systeme3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cover crops significantly affect rice grain yield and its components”
e3“fallow/soybean/fallow (4,507 kg ha-1) and millet/soybean/millet (4,765 kg ha-1) rotation at no-tillage system, and incorporated fallow /soybean/ incorporated fallow (4,427 kg ha-1) at conventional tillage system allow the highest rice yield”
Claim · model-written summary
Upland rice yield was similar under no-till and tillage systems.
- Taxon
- riceOryza sativae0
- Treatment
- no-tille4
- Outcome
- upland rice yielde4
- Direction
- similare4
- Value
- 3,194 kg ha-1e4
- Qualifier
- 2,878 kg ha-1e4
- Comparator
- till systeme4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cover crops significantly affect rice grain yield and its components”
e4“upland rice yield is similar at no-till (3,194 kg ha-1) and till system (2,878 kg ha-1)”
The same questions in other papers
Glycine max · yield · Oryza sativa (rice)Positive and negative results
19 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
18 papers more in this group
See all 22 papers →cover crop · yield · Oryza sativa (rice)Results differ
16 papers in the same direction as this paper · 7 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- positive
- no effect
21 papers more in this group
See all 25 papers →rotation · yield · Oryza sativa (rice)Positive and negative results
71 papers in the same direction as this paper · 13 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- negative
82 papers more in this group
See all 86 papers →drought · yield · Oryza sativa (rice)Positive and negative results
75 papers in the same direction as this paper · 246 in the opposite direction · 3 reporting no difference from an alternative
- negative
- negative
- negative
321 papers more in this group
See all 325 papers →tillage · yield · Oryza sativa (rice)Positive and negative results
141 papers in the same direction as this paper · 587 reporting no difference from an alternative
- positive
- positive
- positive
725 papers more in this group
See all 729 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.