Abstract
Long-term research shows that phosphorus (P) and nitrogen (N) fertilizer must be applied to optimize production of irrigated grain sorghum in western Kansas. In 2018, N applied alone increased yields 44 bu/a, whereas N and P applied together increased yields up to 67 bu/a. Averaged across the past 10 years, N and P fertilization increased sorghum yields up to 75 bu/a. Application of 80 lb/a N (with P) produced the maximum yield in 2018, which is slightly less than the 10-yr average. Application of potassium (K) has had no effect on sorghum yield throughout the study period. Average grain N content reached a maximum of ~0.7 lb/bu while grain P content reached a maximum of 0.15 lb/bu (0.34 lb P2O5/bu) and grain K content reached a maximum of 0.19 lb/bu (0.23 lb K2O/bu). At the highest N, P, and K rate, apparent fertilizer recovery in the grain was 31% for N, 65% for P, and 38% for K.
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Claims 12
Claim · model-written summary
N applied alone increased grain sorghum yield by 44 bu/a in 2018.
- Taxon
- grain sorghum
Sorghum bicolore0 - Treatment
- N applied alonee1
- Outcome
- yieldse1
- Direction
- increasede1
- Value
- 44 bu/ae1
- Setting
- western Kansase0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimize production of irrigated grain sorghum in western Kansas”
e1“In 2018, N applied alone increased yields 44 bu/a”
Claim · model-written summary
N and P applied together increased grain sorghum yield by up to 67 bu/a in 2018.
- Taxon
- grain sorghumSorghum bicolore0
- Treatment
- N and P applied togethere1
- Outcome
- yieldse1
- Direction
- increasede1
- Value
- 67 bu/ae1
- Setting
- western Kansase0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimize production of irrigated grain sorghum in western Kansas”
e1“N and P applied together increased yields up to 67 bu/a”
Claim · model-written summary
Averaged over 10 years, N and P fertilization increased sorghum yield by up to 75 bu/a.
- Taxon
- grain sorghumSorghum bicolore0
- Treatment
- N and P fertilizatione1
- Outcome
- sorghum yieldse1
- Direction
- increasede1
- Value
- 75 bu/ae1
- Qualifier
- Averaged across the past 10 yearse1
- Setting
- western Kansase0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimize production of irrigated grain sorghum in western Kansas”
e1“Averaged across the past 10 years, N and P fertilization increased sorghum yields up to 75 bu/a”
Claim · model-written summary
Applying 80 lb/a N with P gave the maximum sorghum yield in 2018, slightly less than the 10-year average.
- Taxon
- grain sorghumSorghum bicolore0
- Treatment
- Application of 80 lb/a N (with P)e1
- Outcome
- yielde1
- Direction
- maximume1
- Qualifier
- slightly less thane1
- Comparator
- 10-yr averagee1
- Setting
- western Kansase0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimize production of irrigated grain sorghum in western Kansas”
e1“Application of 80 lb/a N (with P) produced the maximum yield in 2018, which is slightly less than the 10-yr average”
Claim · model-written summary
Potassium application had no effect on grain sorghum yield over the study period.
- Taxon
- grain sorghumSorghum bicolore0
- Treatment
- Application of potassium (K)e1
- Outcome
- sorghum yielde1
- Direction
- no effecte1
- Setting
- western Kansase0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimize production of irrigated grain sorghum in western Kansas”
e1“Application of potassium (K) has had no effect on sorghum yield throughout the study period”
Claim · model-written summary
Average grain N content reached a maximum of about 0.7 lb/bu in grain sorghum.
- Taxon
- grain sorghumSorghum bicolore0
- Organ / stage
- graine1
- Outcome
- grain N contente1
- Value
- ~0.7 lb/bue1
- Setting
- western Kansase0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimize production of irrigated grain sorghum in western Kansas”
e1“Average grain N content reached a maximum of ~0.7 lb/bu”
Claim · model-written summary
Grain P content reached a maximum of 0.15 lb/bu (0.34 lb P2O5/bu) in grain sorghum.
- Taxon
- grain sorghumSorghum bicolore0
- Organ / stage
- graine1
- Outcome
- grain P contente1
- Value
- 0.15 lb/bu (0.34 lb P2O5/bu)e1
- Setting
- western Kansase0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimize production of irrigated grain sorghum in western Kansas”
e1“grain P content reached a maximum of 0.15 lb/bu (0.34 lb P2O5/bu)”
Claim · model-written summary
Grain K content reached a maximum of 0.19 lb/bu (0.23 lb K2O/bu) in grain sorghum.
- Taxon
- grain sorghumSorghum bicolore0
- Organ / stage
- graine1
- Outcome
- grain K contente1
- Value
- 0.19 lb/bu (0.23 lb K2O/bu)e1
- Setting
- western Kansase0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimize production of irrigated grain sorghum in western Kansas”
e1“grain K content reached a maximum of 0.19 lb/bu (0.23 lb K2O/bu)”
Claim · model-written summary
At the highest N, P and K rate, apparent fertilizer recovery in the grain was 31% for N.
- Taxon
- grain sorghumSorghum bicolore0
- Organ / stage
- graine1
- Treatment
- highest N, P, and K ratee1
- Outcome
- apparent fertilizer recoverye1
- Value
- 31%e1
- Qualifier
- for Ne1
- Setting
- western Kansase0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimize production of irrigated grain sorghum in western Kansas”
e1“At the highest N, P, and K rate, apparent fertilizer recovery in the grain was 31% for N, 65% for P, and 38% for K”
Claim · model-written summary
At the highest N, P and K rate, apparent fertilizer recovery in the grain was 65% for P.
- Taxon
- grain sorghumSorghum bicolore0
- Organ / stage
- graine1
- Treatment
- highest N, P, and K ratee1
- Outcome
- apparent fertilizer recoverye1
- Value
- 65%e1
- Qualifier
- for Pe1
- Setting
- western Kansase0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimize production of irrigated grain sorghum in western Kansas”
e1“At the highest N, P, and K rate, apparent fertilizer recovery in the grain was 31% for N, 65% for P, and 38% for K”
Claim · model-written summary
At the highest N, P and K rate, apparent fertilizer recovery in the grain was 38% for K.
- Taxon
- grain sorghumSorghum bicolore0
- Organ / stage
- graine1
- Treatment
- highest N, P, and K ratee1
- Outcome
- apparent fertilizer recoverye1
- Value
- 38%e1
- Qualifier
- for Ke1
- Setting
- western Kansase0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimize production of irrigated grain sorghum in western Kansas”
e1“At the highest N, P, and K rate, apparent fertilizer recovery in the grain was 31% for N, 65% for P, and 38% for K”
Claim · model-written summary
Phosphorus and nitrogen fertilizer must be applied to optimize production of irrigated grain sorghum in western Kansas.
- Taxon
- grain sorghumSorghum bicolore0
- Outcome
- phosphorus (P) and nitrogen (N) fertilizer must be appliede1
- Setting
- western Kansase0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimize production of irrigated grain sorghum in western Kansas”
e1“Long-term research shows that phosphorus (P) and nitrogen (N) fertilizer must be applied”
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See all 12 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.