Abstract
Anhydrous ammonia gas. was applied on September 1 and 15; October 1 and 15; and November I, .1963, to Deltapine Smooth Leaf cotton (Gossypium hirsutum L.) for evalua tion as a cotton defoliant under field conditions at the University of Arizona Campbell Avenue Farm, Tucson, Arizona. Three concentrations of anhydrous ammonia gas were applied on September 1 and 15 and October 1 and two concentrations on October 15 and November 1, 1963. The average per cent abscission of upper and lower leaves increased with increasing concentrations of anhydrous ammonia gas at all application dates. Adequate abscission (80% or more) of upper and lower leaves was induced with 60,000 ppm of anhydrous ammonia gas at all application dates except November 1. Adequate abscission of upper and lower leaves was induced with 40,000 ppm of anhydrous ammonia gas only on September 15. The 20,000 ppm concentration failed to induce adequate abscission at any application date. September 1 was the optimum date to induce the highest per cent of adequate defoliation of upper and lower leaves with 60,000 ppm, while September 15 was the optimum date to induce the highest per cent of adequate defoliation of upper and lower leaves with 40,000 ppm.
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Claims 6
Claim · model-written summary
Leaf abscission increased with ammonia concentration at all dates.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- anhydrous ammonia gase0
- Outcome
- per cent abscission of upper and lower leavese0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average per cent abscission of upper and lower leaves increased with increasing concentrations of anhydrous ammonia gas at all application dates”
t0“cotton”
Claim · model-written summary
60,000 ppm ammonia induced at least 80% abscission except on November 1.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 60,000 ppm of anhydrous ammonia gase0
- Outcome
- abscission (80% or more) of upper and lower leavese0
- Direction
- inducede0
- Qualifier
- except November 1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adequate abscission (80% or more) of upper and lower leaves was induced with 60,000 ppm of anhydrous ammonia gas at all application dates except November 1”
t0“cotton”
Claim · model-written summary
40,000 ppm ammonia induced adequate abscission only on September 15.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 40,000 ppm of anhydrous ammonia gase0
- Outcome
- abscission of upper and lower leavese0
- Direction
- inducede0
- Qualifier
- only on September 15e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adequate abscission of upper and lower leaves was induced with 40,000 ppm of anhydrous ammonia gas only on September 15”
t0“cotton”
Claim · model-written summary
20,000 ppm failed to induce adequate abscission on any date.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 20,000 ppm concentratione0
- Outcome
- adequate abscissione0
- Direction
- failed to inducee0
- Qualifier
- at any application datee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 20,000 ppm concentration failed to induce adequate abscission at any application date”
t0“cotton”
Claim · model-written summary
September 1 was optimal for defoliation with 60,000 ppm.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 60,000 ppme0
- Outcome
- per cent of adequate defoliation of upper and lower leavese0
- Direction
- higheste0
- Value
- 60,000 ppme0
- Qualifier
- September 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“September 1 was the optimum date to induce the highest per cent of adequate defoliation of upper and lower leaves with 60,000 ppm”
t0“cotton”
Claim · model-written summary
September 15 was optimal for defoliation with 40,000 ppm.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 40,000 ppme0
- Outcome
- per cent of adequate defoliation of upper and lower leavese0
- Direction
- higheste0
- Qualifier
- September 15e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“September 15 was the optimum date to induce the highest per cent of adequate defoliation of upper and lower leaves with 40,000 ppm”
t0“cotton”