Abstract
Hail damage can result in substantial economic loss to annual spring and summer crops. Crop insurance guidelines to assess hail damage on major crops are readily available to adjusters. However, research and guidelines to assess hail damage on minor crops is lacking and may limit their expansion. A dryland field study with guar [ Cyamopsis tetragonoloba (L.) Taub.] was designed to determine the effect of simulated hail damage at two growth stages and three levels of defoliation on plant regrowth and bean yield. Experiments were conducted on a Miles fine sandy loam (fine‐loamy, mixed, superactive, thermic Typic Paleustalfs) near Vernon, TX, from 2001 through 2003. A commercial grass trimmer was used to simulate hail damage by flailing plants to targeted defoliations levels of 33, 66, and 90% at 6 and 12 wk after emergence (WAE). Both final plant height and yield were reduced to a greater extent when plants were damaged at 12 WAE (grain‐fill period) than at 6 WAE (early flowering). Regression analysis from data combined over years showed that guar yields were reduced 50% with a 66% defoliation level at 6 WAE, but required only 42% defoliation to reduce yield levels 50% with late‐season defoliation. This is the first report of using a grass trimmer to simulate hail damage by shredding plant material rather than manually removing plants and plant parts. Results from this study also provide a basis for producers and insurance adjusters to quantify and estimate economic losses in guar due to hail damage at two growth stages.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 5
Claim · model-written summary
Late damage reduced final height more than early damage.
- Taxon
- guar
Cyamopsis tetragonolobat0 - Treatment
- damaged at 12 WAEe0
- Outcome
- final plant heighte0
- Direction
- reduced to a greater extente0
- Comparator
- 6 WAEe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both final plant height and yield were reduced to a greater extent when plants were damaged at 12 WAE (grain‐fill period) than at 6 WAE (early flowering).”
t0“guar”
Claim · model-written summary
Late damage reduced yield more than early damage.
- Taxon
- guarCyamopsis tetragonolobat0
- Treatment
- damaged at 12 WAEe0
- Outcome
- yielde0
- Direction
- reduced to a greater extente0
- Comparator
- 6 WAEe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both final plant height and yield were reduced to a greater extent when plants were damaged at 12 WAE (grain‐fill period) than at 6 WAE (early flowering).”
t0“guar”
Claim · model-written summary
At 6 WAE, 66% defoliation reduced yield 50%.
- Taxon
- guarCyamopsis tetragonolobae0
- Treatment
- 66% defoliation level at 6 WAEe0
- Outcome
- yieldse0
- Direction
- reducede0
- Value
- 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“guar yields were reduced 50% with a 66% defoliation level at 6 WAE”
Claim · model-written summary
For late defoliation, 42% defoliation reduced yield 50%.
- Taxon
- guarCyamopsis tetragonolobat0
- Treatment
- 42% defoliatione0
- Outcome
- yield levelse0
- Direction
- reducee0
- Value
- 50%e0
- Qualifier
- late‐season defoliatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“required only 42% defoliation to reduce yield levels 50% with late‐season defoliation.”
t0“guar”
Claim · model-written summary
A grass trimmer can simulate hail damage by shredding plant material.
- Taxon
- guarCyamopsis tetragonolobat0
- Outcome
- simulate hail damagee0
- Comparator
- manually removing plants and plant partse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This is the first report of using a grass trimmer to simulate hail damage by shredding plant material rather than manually removing plants and plant parts.”
t0“guar”
The same questions in other papers
pruning · yield · Cyamopsis tetragonoloba (cluster bean)Positive and negative results
1 in the opposite direction
- positive
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.