Abstract
Understanding spatial and temporal variability patterns of crop yield and their relationship with soil properties can provide decision support to optimize crop management. The objectives of this study were to (1) determine the spatial and temporal variability of cotton (Gossypium hirsutum L.) lint yield over different growing seasons; (2) evaluate the relationship between spatial and temporal yield patterns and apparent soil electrical conductivity (ECa). This study was conducted in eight production fields, six with 50 ha and two with 25 ha, on the Southern High Plains (SHP) from 2000 to 2003. Cotton yield and ECa data were collected using a yield monitor and an ECa mapping system, respectively. The amount and pattern of spatial and temporal yield variability varied with the field. Fields with high variability in ECa exhibited a stronger association between spatial and temporal yield patterns and ECa, indicating that soil properties related to ECa were major factors influencing yield variability. The application of ECa for site-specific management is limited to fields with high spatial variability and with a strong association between yield spatial and temporal patterns and ECa variation patterns. For fields with low variability in yield, spatial and temporal yield patterns might be more influenced by weather or other factors in different growing seasons. Fields with high spatial variability and a clear temporal stability pattern have great potential for long-term site-specific management of crop inputs. For unstable yield, however, long-term management practices are difficult to implement. For these fields with unstable yield patterns, within season site-specific management can be a better choice. Variable rate application of water, plant growth regulators, nitrogen, harvest aids may be implemented based on the spatial variability of crop growth conditions at specific times.
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Claims 9
Claim · model-written summary
Spatial and temporal cotton yield variability differed among fields.
- Taxon
- Cotton
Gossypium hirsutumt0 - Outcome
- spatial and temporal yield variabilitye1
- Qualifier
- varied with the fielde1
- Setting
- Southern High Plainst0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Cotton Yield in the Southern High Plains”
e1“The amount and pattern of spatial and temporal yield variability varied with the field”
Claim · model-written summary
Fields with high ECa variability showed a stronger association between spatial and temporal yield patterns and ECa.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- high variability in ECae1
- Outcome
- association between spatial and temporal yield patterns and ECae1
- Direction
- strongere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Cotton Yield in the Southern High Plains”
e1“Fields with high variability in ECa exhibited a stronger association between spatial and temporal yield patterns and ECa”
Claim · model-written summary
Soil properties related to ECa were major factors influencing cotton yield variability.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- yield variabilitye1
- Qualifier
- soil properties related to ECae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Cotton Yield in the Southern High Plains”
e1“indicating that soil properties related to ECa were major factors influencing yield variability”
Claim · model-written summary
Spatial and temporal yield patterns in low-variability cotton fields might be more influenced by weather or other factors across seasons.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- spatial and temporal yield patternse1
- Qualifier
- weather or other factors in different growing seasonse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Cotton Yield in the Southern High Plains”
e1“For fields with low variability in yield, spatial and temporal yield patterns might be more influenced by weather or other factors in different growing seasons”
Claim · model-written summary
ECa-based site-specific management is limited to cotton fields with high spatial variability and a strong association between yield and ECa patterns.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- application of ECa for site-specific managemente1
- Qualifier
- limited to fields with high spatial variabilitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Cotton Yield in the Southern High Plains”
e1“The application of ECa for site-specific management is limited to fields with high spatial variability and with a strong association between yield spatial and temporal patterns and ECa variation patterns”
Claim · model-written summary
Fields with high spatial variability and a clear temporal stability pattern have great potential for long-term site-specific management of crop inputs.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- long-term site-specific management of crop inputse1
- Qualifier
- high spatial variability and a clear temporal stability patterne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Cotton Yield in the Southern High Plains”
e1“Fields with high spatial variability and a clear temporal stability pattern have great potential for long-term site-specific management of crop inputs”
Claim · model-written summary
For cotton fields with unstable yield, long-term management practices are difficult to implement.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- long-term management practices are difficult to implemente1
- Qualifier
- For unstable yielde1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Cotton Yield in the Southern High Plains”
e1“For unstable yield, however, long-term management practices are difficult to implement”
Claim · model-written summary
For cotton fields with unstable yield patterns, within season site-specific management can be a better choice.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- within season site-specific managemente1
- Qualifier
- unstable yield patternse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Cotton Yield in the Southern High Plains”
e1“For these fields with unstable yield patterns, within season site-specific management can be a better choice”
Claim · model-written summary
Variable rate application of water, plant growth regulators, nitrogen and harvest aids may be implemented based on spatial variability of crop growth conditions.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- Variable rate application of water, plant growth regulators, nitrogen, harvest aidse1
- Qualifier
- based on the spatial variability of crop growth conditions at specific timese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Cotton Yield in the Southern High Plains”
e1“Variable rate application of water, plant growth regulators, nitrogen, harvest aids may be implemented based on the spatial variability of crop growth conditions at specific times”