Abstract
The effect of tillage and crop rotations can only be seen over many crop years. Crop yield and soil results are evaluated from two long-term trials, established in 1978–79 and 1985–86 to investigate various forms of tillage and the timing of such operations in various wheat ( Triticum aestivum )-based rotations on a Calcixerollic Xerochrept in northern Syria. In a tillage systems trial involving two wheat–legume–watermelon ( Citrullus lanatus ) rotations, deep tillage showed no advantage over a shallow sweep-tillage system, either for soil moisture storage or yield increase of any crop. The zero-till system suited legume crops but gave lower productivity in wheat due to a build up of grassy weeds, and was not suitable for watermelon. Minimum tillage, with its higher energy-use efficiency and yield levels equal to or even slightly above those of deep-tillage systems, appears promising for the lowland areas of West Asia and North Africa. In a tillage timing trial, wheat in a wheat–lentil ( Lens culinaris ) rotation yielded best after conventional deep disc-plough tillage, but lentil yields were higher in a zero-till system.
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Claims 9
Claim · model-written summary
Deep tillage showed no advantage over a shallow sweep-tillage system for soil moisture storage or yield increase of any crop.
Verbatim
e1“deep tillage showed no advantage over a shallow sweep-tillage system, either for soil moisture storage or yield increase of any crop”
Claim · model-written summary
The zero-till system suited legume crops.
Not reportedComparatorDirection
Verbatim
e1“The zero-till system suited legume crops”
Claim · model-written summary
The zero-till system gave lower wheat productivity due to a build up of grassy weeds.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- The zero-till systeme2
- Interactor
- grassy weedse1weed
- Outcome
- productivitye1
- Direction
- lowere1
- Qualifier
- due to a build up of grassy weedse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“gave lower productivity in wheat due to a build up of grassy weeds”
e2“The zero-till system”
Claim · model-written summary
The zero-till system was not suitable for watermelon.
- Taxon
- watermelon
Citrullus lanatuse1 - Treatment
- The zero-till systeme2
- Outcome
- not suitablee1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“was not suitable for watermelon”
e2“The zero-till system”
Claim · model-written summary
Minimum tillage had higher energy-use efficiency than deep-tillage systems.
- Treatment
- Minimum tillagee1
- Outcome
- energy-use efficiencye1
- Direction
- highere1
- Comparator
- deep-tillage systemse1
Not reportedTaxon
Verbatim
e1“Minimum tillage, with its higher energy-use efficiency and yield levels equal to or even slightly above those of deep-tillage systems”
Claim · model-written summary
Minimum tillage gave yield levels equal to or even slightly above those of deep-tillage systems.
- Treatment
- Minimum tillagee1
- Outcome
- yield levelse1
- Direction
- equal to or even slightly abovee1
- Comparator
- deep-tillage systemse1
Not reportedTaxon
Verbatim
e1“Minimum tillage, with its higher energy-use efficiency and yield levels equal to or even slightly above those of deep-tillage systems”
Claim · model-written summary
Minimum tillage appears promising for the lowland areas of West Asia and North Africa.
- Treatment
- Minimum tillagee1
- Outcome
- appears promisinge2
- Setting
- lowland areas of West Asia and North Africae2
Not reportedTaxon
Verbatim
e1“Minimum tillage”
e2“appears promising for the lowland areas of West Asia and North Africa”
Claim · model-written summary
In a tillage timing trial, wheat in a wheat-lentil rotation yielded best after conventional deep disc-plough tillage.
- Taxon
- wheatTriticum aestivume1
- Treatment
- conventional deep disc-plough tillagee1
- Outcome
- yieldede1
- Direction
- beste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“wheat in a wheat–lentil ( Lens culinaris ) rotation yielded best after conventional deep disc-plough tillage”
Claim · model-written summary
Lentil yields were higher in a zero-till system in the tillage timing trial.
- Taxon
- lentil
Lens culinarise1 - Treatment
- zero-till systeme1
- Outcome
- lentil yieldse1
- Direction
- highere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“lentil yields were higher in a zero-till system”
The same questions in other papers
tillage · yield · Lens culinaris (lentil)Positive and negative results
30 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
29 papers more in this group
See all 33 papers →tillage · yield · Triticum aestivum (wheat)Positive and negative results
1,115 papers in the same direction as this paper · 257 in the opposite direction · 41 reporting no difference from an alternative
- negative
- negative
- negative
1,410 papers more in this group
See all 1,414 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.