Abstract
SUMMARY Experiments were conducted across 2 years to determine the effect of harvesting methods – combine harvester and hand harvesting – and harvest time during ripening on milling quality of long grain rice grown in the rainfed lowland ecosystem in Cambodia. Head rice yield (HRY) was highest when rice was harvested 25 days after flowering and decreased with delay in harvesting at 35 and 45 days after flowering. This was accompanied by a general decline in grain moisture content at harvest, although it was still high at 24–25% at 35 days after flowering. The decline in HRY was associated with increases in fissured grain percentage observed immediately after harvest. Hand harvesting produced 2–6% higher HRY than combine harvesting. Fissured grain in hand harvested crops was lower in year 1, but was similar to combine harvested crops in year 2. Both hand and combine harvested crops were sun-dried but rough rice harvested by combine was dried on plastic sheet and this may have contributed to reduction in HRY. Maximum HRY percentage was only about 44% and the factors contributing to this low HRY were discussed. Harvesting time and methods had no significant effect on grain yield, but the field grain loss during the harvesting operation was 2–5% higher in combine than hand harvesting.
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Claims 9
Claim · model-written summary
Head rice yield peaked at 25 days after flowering and fell with later harvest.
- Taxon
- rice
Oryza sativat0 - Treatment
- delay in harvesting at 35 and 45 days after floweringe0
- Outcome
- Head rice yield (HRY)e0
- Direction
- decreasede0
- Comparator
- 25 days after floweringe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Head rice yield (HRY) was highest when rice was harvested 25 days after flowering and decreased with delay in harvesting at 35 and 45 days after flowering”
t0“RICE”
Claim · model-written summary
Grain moisture declined with delayed harvest.
- Taxon
- riceOryza sativat0
- Organ / stage
- graine0
- Outcome
- grain moisture contente0
- Direction
- declinee0
- Value
- 24–25%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This was accompanied by a general decline in grain moisture content at harvest, although it was still high at 24–25% at 35 days after flowering”
t0“RICE”
Claim · model-written summary
Lower head rice yield was associated with more fissured grain.
- Taxon
- riceOryza sativat0
- Organ / stage
- graine0
- Outcome
- HRYe0
- Direction
- declinee0
- Qualifier
- increases in fissured grain percentagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decline in HRY was associated with increases in fissured grain percentage observed immediately after harvest”
t0“RICE”
Claim · model-written summary
Hand harvest yielded 2–6% more head rice than combine harvest.
- Taxon
- riceOryza sativat0
- Treatment
- Hand harvestinge0
- Outcome
- HRYe0
- Direction
- highere0
- Value
- 2–6%e0
- Comparator
- combine harvestinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hand harvesting produced 2–6% higher HRY than combine harvesting”
t0“RICE”
Claim · model-written summary
Hand harvested crops had less fissured grain in year one.
- Taxon
- riceOryza sativat0
- Treatment
- hand harvested cropse0
- Outcome
- Fissured graine0
- Direction
- lowere0
- Qualifier
- year 1e0
- Comparator
- combine harvested cropse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fissured grain in hand harvested crops was lower in year 1, but was similar to combine harvested crops in year 2”
t0“RICE”
Claim · model-written summary
Fissured grain was similar between harvest methods in year two.
- Taxon
- riceOryza sativat0
- Treatment
- hand harvested cropse0
- Outcome
- Fissured graine0
- Direction
- similare0
- Qualifier
- year 2e0
- Comparator
- combine harvested cropse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fissured grain in hand harvested crops was lower in year 1, but was similar to combine harvested crops in year 2”
t0“RICE”
Claim · model-written summary
The maximum head rice yield was about 44%.
- Taxon
- riceOryza sativat0
- Outcome
- Maximum HRY percentagee0
- Direction
- Maximume0
- Value
- about 44%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum HRY percentage was only about 44%”
t0“RICE”
Claim · model-written summary
Harvest method and timing had no significant effect on grain yield.
- Taxon
- riceOryza sativat0
- Treatment
- Harvesting time and methodse0
- Outcome
- grain yielde0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Harvesting time and methods had no significant effect on grain yield”
t0“RICE”
Claim · model-written summary
Combine harvest caused 2–5% more field grain loss than hand harvest.
- Taxon
- riceOryza sativat0
- Treatment
- combinee0
- Outcome
- field grain losse0
- Direction
- highere0
- Value
- 2–5%e0
- Comparator
- hand harvestinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the field grain loss during the harvesting operation was 2–5% higher in combine than hand harvesting”
t0“RICE”
The same questions in other papers
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See all 13 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.