Abstract
Abstract The effect of increasing foliage and soil reflectivity on yield and water use efficiency of grain Sorghum crops ( Sorghum bicolor (L.) Moench.) grown under arid conditions with stored soil water only, was studied during 3 years of randomized block field experiments. Suspensions of kaolin were sprayed on the soil and/or foliage at different growth stages to select the most effective placement and timing for the treatment. Soil‐only applications were ineffective in increasing yields but canopy sprays resulted in an additional yield of 446 kg/ha, or 11% over the unsprayed controls, averaged over the 3 years of experimentation. The most effective period for foliage sprays started seven weeks after seedling emergence and ended 10 days later, immediately before the panicles emerged. During this period, known to be critical for Sorghum grain yield response to water status, the yield response averaged 2 kg grain/1 kg kaolin applied. Neither the total seasonal water use nor the rate of soil water depletion was affected by the foliage reflectance treatment. It is concluded that under arid conditions, kaolin suspensions sprayed twice on the foliage of unirrigated grain Sorghum crops during the prepanicle‐emergence stage shows promise as an effective method of increasing grain yield.
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Claims 6
Claim · model-written summary
Soil-only kaolin did not increase sorghum yield.
- Taxon
- Grain Sorghum
Sorghum bicolort0 - Treatment
- Soil‐only applicationse0
- Outcome
- yieldse0
- Direction
- ineffective in increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil‐only applications were ineffective in increasing yields”
t0“Grain Sorghum”
Claim · model-written summary
Canopy kaolin spray increased sorghum yield by 446 kg/ha or 11% over controls.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- canopy sprayse0
- Outcome
- yielde0
- Direction
- additionale0
- Value
- 446 kg/hae0
- Qualifier
- 11%e0
- Comparator
- unsprayed controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“canopy sprays resulted in an additional yield of 446 kg/ha, or 11% over the unsprayed controls”
t0“Grain Sorghum”
Claim · model-written summary
Foliage sprays were most effective from seven weeks after emergence until ten days later.
- Taxon
- Grain SorghumSorghum bicolort0
- Outcome
- most effective period for foliage sprayse0
- Value
- seven weeks after seedling emergencee0
- Qualifier
- ended 10 days later, immediately before the panicles emergede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most effective period for foliage sprays started seven weeks after seedling emergence and ended 10 days later, immediately before the panicles emerged”
t0“Grain Sorghum”
Claim · model-written summary
In the most effective period, sorghum yield response averaged 2 kg grain per 1 kg kaolin.
- Taxon
- Grain SorghumSorghum bicolort0
- Outcome
- yield responsee0
- Value
- 2 kg grain/1 kg kaoline0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield response averaged 2 kg grain/1 kg kaolin applied”
t0“Grain Sorghum”
Claim · model-written summary
Foliage reflectance did not affect total seasonal water use or soil water depletion rate.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- foliage reflectance treatmente0
- Outcome
- total seasonal water use nor the rate of soil water depletione0
- Direction
- Neithere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither the total seasonal water use nor the rate of soil water depletion was affected by the foliage reflectance treatment”
t0“Grain Sorghum”
Claim · model-written summary
Two prepanicle foliage kaolin sprays were recommended to increase unirrigated sorghum yield under arid conditions.
- Outcome
- kaolin suspensions sprayed twice on the foliage of unirrigated grain Sorghum crops during the prepanicle‐emergence stagee0
- Qualifier
- under arid conditionse0
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under arid conditions, kaolin suspensions sprayed twice on the foliage of unirrigated grain Sorghum crops during the prepanicle‐emergence stage shows promise as an effective method of increasing grain yield”
The same questions in other papers
application · yield · Sorghum bicolor (sorghum)Positive and negative results
20 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
19 papers more in this group
See all 23 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.