Abstract
Abstract Increasing leaf age of corn within four growth stages had little effect on near‐infrared light (750‐ to 1350‐nm wavelength interval) reflectance, whereas mature leaves of cotton had higher near‐infrared light reflectance than young leaves. Reflectance was linearly correlated with chlorophyll concentration for the four growth stages of corn (r −0.75**) at the 550‐nm wavelength; the linear correlation of reflectance with chlorophyll for the four growth stages of cotton was significant (r −0.71**) at the 650‐nm wavelength. The largest differences among reflectances of corn leaves of different ages within growth stages occurred when tassels were appearing in the leaf whorls; this may be the best time to discriminate corn from other vegetation with remote sensors. Reflectance differences among cotton leaves within the four growth stages were similar. Spectral wavelength intervals centered around the 680‐, 850‐, 1,650‐, and 2,200‐nm wavelengths provide for the optimum discrimination of vegetation.
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Claims 8
Claim · model-written summary
Increasing leaf age of corn within four growth stages had little effect on near-infrared reflectance.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- Increasing leaf agee1
- Outcome
- reflectancee1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Increasing leaf age of corn within four growth stages had little effect on near‐infrared light (750‐ to 1350‐nm wavelength interval) reflectance”
Claim · model-written summary
Mature cotton leaves had higher near-infrared reflectance than young cotton leaves.
- Taxon
- cotton
Gossypium hirsutume1 - Treatment
- mature leavese1
- Outcome
- reflectancee1
- Direction
- highere1
- Comparator
- young leavese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“mature leaves of cotton had higher near‐infrared light reflectance than young leaves”
Claim · model-written summary
Reflectance was linearly correlated with chlorophyll concentration across the four growth stages of corn.
- Taxon
- cornZea mays subsp. mayse1
- Compound
- chlorophyll concentratione1
- Outcome
- Reflectancee1
- Value
- r −0.75**e1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Reflectance was linearly correlated with chlorophyll concentration for the four growth stages of corn (r −0.75**) at the 550‐nm wavelength”
Claim · model-written summary
The linear correlation of reflectance with chlorophyll across the four growth stages of cotton was significant.
- Taxon
- cottonGossypium hirsutume1
- Compound
- chlorophylle1
- Outcome
- reflectancee1
- Value
- r −0.71**e1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the linear correlation of reflectance with chlorophyll for the four growth stages of cotton was significant (r −0.71**) at the 650‐nm wavelength”
Claim · model-written summary
The largest reflectance differences among corn leaves of different ages occurred when tassels were appearing in the leaf whorls.
- Taxon
- cornZea mays subsp. mayse1
- Organ / stage
- when tassels were appearing in the leaf whorlse1
- Outcome
- largest differences among reflectancese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The largest differences among reflectances of corn leaves of different ages within growth stages occurred when tassels were appearing in the leaf whorls”
Claim · model-written summary
The stage of tassel appearance may be the best time to discriminate corn from other vegetation with remote sensors.
- Taxon
- cornZea mays subsp. mayse1
- Outcome
- discriminate corn from other vegetatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“this may be the best time to discriminate corn from other vegetation with remote sensors”
Claim · model-written summary
Reflectance differences among cotton leaves were similar across the four growth stages.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- Reflectance differences among cotton leavese1
- Qualifier
- similare1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Reflectance differences among cotton leaves within the four growth stages were similar”
Claim · model-written summary
Spectral intervals centred around 680, 850, 1,650 and 2,200 nm give optimum discrimination of vegetation.
Verbatim
e1“Spectral wavelength intervals centered around the 680‐, 850‐, 1,650‐, and 2,200‐nm wavelengths provide for the optimum discrimination of vegetation”