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 2015, N applied alone increased yields 66 bu/a, whereas N and P applied together increased yields up to 92 bu/a. Averaged across the past 10 years, N and P fertilization increased sorghum yields up to 76 bu/a. Application of 40 lb/a N (with P) was sufficient to produce 88% of maximum yield in 2015 which is slightly above the 10-year 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).
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Claims 8
Claim · model-written summary
Nitrogen alone increased 2015 sorghum yield by 66 bu/a.
- Taxon
- Grain Sorghum
Sorghum bicolort0 - Treatment
- N applied alonee0
- Outcome
- yieldse0
- Direction
- increasede0
- Value
- 66 bu/ae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2015, N applied alone increased yields 66 bu/a, whereas N and P applied together increased yields up to 92 bu/a.”
t0“Grain Sorghum”
Claim · model-written summary
Nitrogen and phosphorus together increased 2015 yield by up to 92 bu/a.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- N and P applied togethere0
- Outcome
- yieldse0
- Direction
- increasede0
- Value
- 92 bu/ae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2015, N applied alone increased yields 66 bu/a, whereas N and P applied together increased yields up to 92 bu/a.”
t0“Grain Sorghum”
Claim · model-written summary
N and P increased ten-year average sorghum yields by up to 76 bu/a.
- Treatment
- N and P fertilizatione0
- Outcome
- sorghum yieldse0
- Direction
- increasede0
- Value
- 76 bu/ae0
- Qualifier
- past 10 yearse0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Averaged across the past 10 years, N and P fertilization increased sorghum yields up to 76 bu/a.”
Claim · model-written summary
Applying 40 lb/a N with P produced 88% of maximum yield in 2015.
- Taxon
- Grain SorghumSorghum bicolort0
- Treatment
- 40 lb/a N (with P)e0
- Outcome
- yielde0
- Value
- 88%e0
- Qualifier
- in 2015e0
- Comparator
- maximum yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 40 lb/a N (with P) was sufficient to produce 88% of maximum yield in 2015 which is slightly above the 10-year average.”
t0“Grain Sorghum”
Claim · model-written summary
Potassium application had no effect on sorghum yield over the study period.
- Treatment
- potassium (K)e0
- Outcome
- sorghum yielde0
- Direction
- no effecte0
- Qualifier
- throughout the study periode0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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.
- Taxon
- Grain SorghumSorghum bicolort0
- Outcome
- grain N contente0
- Direction
- maximume0
- Value
- ~0.7 lb/bue0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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).”
t0“Grain Sorghum”
Claim · model-written summary
Grain P content reached a maximum of 0.15 lb/bu.
- Taxon
- Grain SorghumSorghum bicolort0
- Outcome
- grain P contente0
- Direction
- maximume0
- Value
- 0.15 lb/bue0
- Qualifier
- 0.34 lb P2O5/bue0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain P content reached a maximum of 0.15 lb/bu (0.34 lb P2O5/bu)”
t0“Grain Sorghum”
Claim · model-written summary
Grain K content reached a maximum of 0.19 lb/bu.
- Taxon
- Grain SorghumSorghum bicolort0
- Outcome
- grain K contente0
- Direction
- maximume0
- Value
- 0.19 lb/bue0
- Qualifier
- 0.23 lb K2O/bue0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain K content reached a maximum of 0.19 lb/bu (0.23 lb K2O/bu)”
t0“Grain Sorghum”
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See all 446 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.