Abstract
Pearl millet [ Pennisetum glaucum (L.) R. Br.] is a potential crop for the Great Plains, but there are few studies on production practices. The research objective was to determine the optimal planting time for pearl millet in Nebraska relative to sorghum [ Sorghum bicolor (L.) Moench]. This would optimize pearl millet yields, thus increasing the prospect for pearl millet as a crop. Studies were conducted on Sharpsburg silty clay loam (fine, smectitic, mesic, Typic Argiudoll) and Ortello sandy loam (coarse‐loamy, mixed, mesic, Udic Haplustoll) soils between 1995 and 2001. Optimal planting times were determined by relating yields with calendar date, cumulative air heat units, cumulative soil heat units, and soil temperatures. Relative yields related to air or soil heat units were effective in determining the optimal planting time. Optimum pearl millet planting times were 399 air heat units or 410 soil heat units after 1 April for the Sharpsburg soil and 406 soil heat units for the Ortello soil. The optimal sorghum planting time was 308 air heat units or 307 soil heat units after 1 April for the Sharpsburg soil and 402 air heat units after 1 April for the Ortello soil. Both crops had large planting time windows, allowing flexibility in planting time. Sorghum outyielded pearl millet for May and early‐to mid‐June planting times by 0.57 to 2.32 Mg ha −1 while pearl millet had higher yields by 0.95 to 1.20 Mg ha −1 for late June and July planting times. Sorghum produced greater yields than pearl millet for most planting times while pearl millet produced greater yields than sorghum for very late planting times.
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Claims 8
Claim · model-written summary
Optimal pearl millet planting time on Sharpsburg soil was 399 air heat units or 410 soil heat units after 1 April.
- Taxon
- pearl millet
Cenchrus americanuse1 - Outcome
- Optimum pearl millet planting timese1
- Value
- 399 air heat units or 410 soil heat unitse1
- Qualifier
- after 1 Aprile1
- Setting
- Sharpsburg soile1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Optimum pearl millet planting times were 399 air heat units or 410 soil heat units after 1 April for the Sharpsburg soil and 406 soil heat units for the Ortello soil”
Claim · model-written summary
Optimal pearl millet planting time on Ortello soil was 406 soil heat units.
- Taxon
- pearl milletCenchrus americanuse1
- Outcome
- Optimum pearl millet planting timese1
- Value
- 406 soil heat unitse1
- Setting
- Ortello soile1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Optimum pearl millet planting times were 399 air heat units or 410 soil heat units after 1 April for the Sharpsburg soil and 406 soil heat units for the Ortello soil”
Claim · model-written summary
Optimal sorghum planting time on Sharpsburg soil was 308 air heat units or 307 soil heat units after 1 April.
- Outcome
- optimal sorghum planting timee2
- Value
- 308 air heat units or 307 soil heat unitse2
- Qualifier
- after 1 Aprile2
- Setting
- Sharpsburg soile2
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The optimal sorghum planting time was 308 air heat units or 307 soil heat units after 1 April for the Sharpsburg soil and 402 air heat units after 1 April for the Ortello soil”
Claim · model-written summary
Optimal sorghum planting time on Ortello soil was 402 air heat units after 1 April.
- Outcome
- optimal sorghum planting timee2
- Value
- 402 air heat unitse2
- Qualifier
- after 1 Aprile2
- Setting
- Ortello soile2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The optimal sorghum planting time was 308 air heat units or 307 soil heat units after 1 April for the Sharpsburg soil and 402 air heat units after 1 April for the Ortello soil”
Claim · model-written summary
Both pearl millet and sorghum had large planting time windows, allowing flexibility in planting time.
- Taxon
- pearl milletCenchrus americanuse0
- Outcome
- planting time windowse3
- Qualifier
- allowing flexibility in planting timee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The research objective was to determine the optimal planting time for pearl millet in Nebraska relative to sorghum”
e3“Both crops had large planting time windows, allowing flexibility in planting time”
Claim · model-written summary
Sorghum outyielded pearl millet by 0.57 to 2.32 Mg ha −1 at May and early-to mid-June planting times.
- Treatment
- planting timese4
- Outcome
- yieldse4
- Direction
- outyieldede4
- Value
- 0.57 to 2.32 Mg ha −1e4
- Comparator
- pearl millete4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Sorghum outyielded pearl millet for May and early‐to mid‐June planting times by 0.57 to 2.32 Mg ha −1 while pearl millet had higher yields by 0.95 to 1.20 Mg ha −1 for late June and July planting times”
Claim · model-written summary
Pearl millet yielded 0.95 to 1.20 Mg ha −1 more than sorghum at late June and July planting times.
- Taxon
- pearl milletCenchrus americanuse4
- Treatment
- planting timese4
- Outcome
- yieldse4
- Direction
- highere4
- Value
- 0.95 to 1.20 Mg ha −1e4
- Comparator
- Sorghume4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Sorghum outyielded pearl millet for May and early‐to mid‐June planting times by 0.57 to 2.32 Mg ha −1 while pearl millet had higher yields by 0.95 to 1.20 Mg ha −1 for late June and July planting times”
Claim · model-written summary
Relative yields related to heat units were effective in determining the optimal pearl millet planting time.
- Taxon
- pearl milletCenchrus americanuse0
- Outcome
- effective in determining the optimal planting timee5
- Comparator
- calendar datee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Relative yields related to air or soil heat units were effective in determining the optimal planting time”
e6“Optimal planting times were determined by relating yields with calendar date, cumulative air heat units, cumulative soil heat units, and soil temperatures”
e0“The research objective was to determine the optimal planting time for pearl millet in Nebraska relative to sorghum”
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