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 2016, N applied alone increased yields 71 bu/a, whereas N and P applied together increased yields up to 93 bu/a. Averaged across the past 10 years, N and P fertilization increased sorghum yields up to 77 bu/a. Application of 80 lb/a N (with P) was sufficient to produce 89% of maximum yield in 2016, 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 33% for N, 69% for P, and 40% for K.
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Claims 11
Claim · model-written summary
Nitrogen alone increased 2016 sorghum yield by 71 bu/a.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2016, N applied alone increased yields 71 bu/a”
t0“Grain Sorghum”
Claim · model-written summary
Nitrogen and phosphorus together increased 2016 sorghum yield by up to 93 bu/a.
- Treatment
- N and P applied togethere0
- Outcome
- yieldse0
- Direction
- increasede0
- Value
- 93 bu/ae0
- Qualifier
- up toe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N and P applied together increased yields up to 93 bu/a”
t0“Grain Sorghum”
Claim · model-written summary
Across the previous 10 years, nitrogen and phosphorus fertilization increased sorghum yield by up to 77 bu/a.
- Treatment
- N and P fertilizatione0
- Outcome
- sorghum yieldse0
- Direction
- increasede0
- Value
- 77 bu/ae0
- Qualifier
- Averaged across the past 10 yearse0
Not 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 77 bu/a”
Claim · model-written summary
At 80 lb/a nitrogen with phosphorus, sorghum produced 89% of maximum yield in 2016.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 80 lb/a N (with P) was sufficient to produce 89% of maximum yield in 2016”
t0“Grain Sorghum”
Claim · model-written summary
Potassium application had no effect on sorghum yield throughout the study.
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 nitrogen content reached a maximum of about 0.7 lb/bu.
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”
t0“Grain Sorghum”
Claim · model-written summary
Average grain phosphorus content reached a maximum of 0.15 lb/bu.
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
Average grain potassium content reached a maximum of 0.19 lb/bu.
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”
Claim · model-written summary
At the highest nitrogen, phosphorus and potassium rates, apparent fertilizer nitrogen recovery in grain was 33%.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the highest N, P, and K rate, apparent fertilizer recovery in the grain was 33% for N, 69% for P, and 40% for K”
t0“Grain Sorghum”
Claim · model-written summary
At the highest nutrient rates, apparent fertilizer phosphorus recovery in grain was 69%.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the highest N, P, and K rate, apparent fertilizer recovery in the grain was 33% for N, 69% for P, and 40% for K”
t0“Grain Sorghum”
Claim · model-written summary
At the highest nutrient rates, apparent fertilizer potassium recovery in grain was 40%.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the highest N, P, and K rate, apparent fertilizer recovery in the grain was 33% for N, 69% for P, and 40% for K”
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.