Abstract
Understanding of how crop yield is influenced by interactions between the soil and environment is needed to minimize agricultural inputs and reduce the impacts of agriculture on the environment. The objective of this study was to determine the effect of soil chemical attributes, soil type, and rainfall on cotton ( Gossypium hirsutum L.) yields and yield variability. In this study, the average cotton fiber yield was collected from 101 fields over nine crop seasons. In these fields, located in central Brazil, the average and standard deviation of normalized difference vegetation index (NDVI) were determined. Growing season rainfall and soil nutrients were measured. The variables analyzed were: average cotton fiber yield, NDVI from Landsat images calculated at the boll development phenological stage (enlargement and fiber filling phases), CV of the NDVI, precipitation during the cycle, and soil chemical attributes. The average field NDVI values collected at the boll development phenological stage were correlated to yield ( r = 0.50; p < 0.05). Fields with a higher CV for the NDVI values generally had lower yields. The effect of precipitation depends on the cotton phenological stage and soil type. A high rainfall volume at the beginning of the cropping cycle increased plant height variability, which harmed the cotton fiber yield. The highest average values of aluminum content, aluminum saturation, and potential acidity promoted variability in cotton plant growth. Soil chemical attributes related to aluminum were negatively correlated with yield ( r = −0.34; p > 0.05). Core Ideas Annual averages of NDVI and yield presented a significant correlation. The effect of precipitation depends on the cotton phenological stage and soil type. Soil chemical variables related to aluminium are negatively correlated with the yield.
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Claims 9
Claim · model-written summary
NDVI at boll development correlated with cotton yield.
- Taxon
- cotton
Gossypium hirsutumt0 - Organ / stage
- boll development phenological stagee0
- Outcome
- yielde0
- Value
- r = 0.50e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average field NDVI values collected at the boll development phenological stage were correlated to yield ( r = 0.50; p < 0.05).”
t0“cotton”
Claim · model-written summary
Fields with more variable NDVI generally had lower yields.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- yieldse0
- Direction
- lowere0
- Comparator
- higher CV for the NDVI valuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fields with a higher CV for the NDVI values generally had lower yields.”
t0“cotton”
Claim · model-written summary
The effect of precipitation depended on cotton stage and soil type.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- cotton phenological stagee0
- Outcome
- effect of precipitatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of precipitation depends on the cotton phenological stage and soil type. A high rainfall”
Claim · model-written summary
High rainfall early in the cycle increased plant height variability.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- high rainfall volumee0
- Outcome
- plant height variabilitye0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A high rainfall volume at the beginning of the cropping cycle increased plant height variability, which harmed the cotton fiber yield.”
Claim · model-written summary
Height variability associated with early rainfall harmed fiber yield.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- high rainfall volumee0
- Outcome
- cotton fiber yielde0
- Direction
- harmede0
- Qualifier
- plant height variabilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A high rainfall volume at the beginning of the cropping cycle increased plant height variability, which harmed the cotton fiber yield.”
Claim · model-written summary
Higher aluminum content promoted variability in cotton growth.
- Taxon
- cottonGossypium hirsutume0
- Compound
- aluminum contente0
- Outcome
- variability in cotton plant growthe0
- Direction
- promotede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest average values of aluminum content, aluminum saturation, and potential acidity promoted variability in cotton plant growth.”
Claim · model-written summary
Higher aluminum saturation promoted variability in cotton growth.
- Taxon
- cottonGossypium hirsutume0
- Compound
- aluminum saturatione0
- Outcome
- variability in cotton plant growthe0
- Direction
- promotede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest average values of aluminum content, aluminum saturation, and potential acidity promoted variability in cotton plant growth.”
Claim · model-written summary
Higher potential acidity promoted variability in cotton growth.
- Taxon
- cottonGossypium hirsutume0
- Compound
- potential aciditye0
- Outcome
- variability in cotton plant growthe0
- Direction
- promotede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest average values of aluminum content, aluminum saturation, and potential acidity promoted variability in cotton plant growth.”
Claim · model-written summary
Aluminum-related soil attributes were negatively correlated with yield, without reported significance.
- Taxon
- cottonGossypium hirsutumt0
- Compound
- aluminume0
- Outcome
- yielde0
- Direction
- negatively correlatede0
- Value
- r = −0.34e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil chemical attributes related to aluminum were negatively correlated with yield ( r = −0.34; p > 0.05).”
t0“cotton”