Abstract
In order to study effect of no tillage and minimum tillage on water storage and salinity variation in soil, and on yield and yield components of wheat in dry and saline lands in the north of Gonbad Kavuos, an experiment was done on Koohdasht variety of wheat with randomized complete block design and 3 replications for 3 years. Treatments of this experiment included: (1) sub soiler + disc (SD), (2) chisel plow + disc (CD) (3) disc (D) (4) double disc (DD) (5) direct planting (P) (6) direct planting + chemical weed control preplanting (PH). In all treatments chemical weed control was done in tillering stage. In this experiment water content and salinity variation of soil was recorded. Also in harvest stage beside grain yield, traits including harvest index, number of spike, number of spikelet per spike, grain number per spike and 1000 grain weight was measured. Results of this experiment indicated that an increase in precipitation up to 70 mm since second year till third year resulted 1.3 tones grain yield increase per hectare and precipitation increase up to 75 mm. since first year till third year caused 1.1 tones grain yield increase in wheat. It means that, in this region the most important and limiting factor in agricultural production is water. Despite this fact, although direct planting had a similar grain yield to other treatments, the least number of germinated plants was observed in this treatment. Germination problem was removed by disc and between one disc and double disc no difference was observed.
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Claims 6
Claim · model-written summary
A 70 mm precipitation increase from year two to three corresponded to a 1.3 tonnes per hectare wheat yield rise.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- precipitatione0
- Outcome
- grain yielde0
- Direction
- increasee0
- Value
- 1.3 tones grain yield increase per hectaree0
- Qualifier
- 70 mme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase in precipitation up to 70 mm since second year till third year resulted 1.3 tones grain yield increase per hectare”
t0“wheat”
Claim · model-written summary
A 75 mm precipitation increase from year one to three corresponded to a 1.1 tonnes per hectare wheat yield rise.
- Taxon
- wheatTriticum aestivume0
- Treatment
- precipitatione0
- Outcome
- grain yielde0
- Direction
- increasee0
- Value
- 1.1 tones grain yield increasee0
- Qualifier
- 75 mm.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“precipitation increase up to 75 mm. since first year till third year caused 1.1 tones grain yield increase in wheat.”
Claim · model-written summary
Direct planting gave similar wheat grain yield to the other tillage treatments.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- direct plantinge0
- Outcome
- grain yielde0
- Direction
- similare0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“direct planting had a similar grain yield to other treatments”
t0“wheat”
Claim · model-written summary
Direct planting had the fewest germinated wheat plants.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- direct plantinge0
- Outcome
- number of germinated plantse0
- Direction
- leaste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“although direct planting had a similar grain yield to other treatments, the least number of germinated plants was observed in this treatment.”
t0“wheat”
Claim · model-written summary
Disc treatment removed the wheat germination problem.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- disce0
- Outcome
- Germination probleme0
- Direction
- removede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germination problem was removed by disc”
t0“wheat”
Claim · model-written summary
One disc and double disc treatments showed no difference.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- one disce0
- Outcome
- differencee0
- Direction
- no differencee0
- Comparator
- double disce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“between one disc and double disc no difference was observed.”
t0“wheat”
The same questions in other papers
(1S)-isoindoline-1-carboxylic acid · growth · Triticum aestivum (wheat)Results agree
4 papers in the same direction as this paper
- positive
- positive
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1 paper more in this group
See all 5 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.