Claim · model-written summary
Profit-maximizing nitrogen for crude-protein production was estimated above 600 lb/acre.
- Taxon
- perennial ryegrass
Lolium perennet0 - Outcome
- crude-protein productione0
- Direction
- greater thane0
- Value
- 600 lb/acre (673 kg/ha)e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“that for crude-protein production was greater than 600 lb/acre (673 kg/ha)”
e1“the optimum nitrogen rate”
t0“perennial ryegrass”
Title
D. Reid The Journal of Agricultural Science 1970. doi:10.1017/s002185960002284x
Other claims from this paper (8)
- Association Pure-grass dry-matter yield response was nearly linear from 0 to 300 lb nitrogen/acre.
- Association Pure-grass dry-matter response decreased steadily above 300 lb nitrogen/acre and became nonsignificant near 500 lb/acre.
- Association Crude-protein yield response was virtually linear through 600–700 lb nitrogen/acre.
- Intervention effect White clover increased dry matter yield at low nitrogen rates.
- Intervention effect White clover increased crude protein yield at low nitrogen rates.
- Intervention effect White clover decreased yield responses to nitrogen.
- Observation Above about 300 lb nitrogen/acre, clover-grass and pure-grass sward yields and responses did not differ significantly.
- Observation Profit-maximizing nitrogen for dry-matter production was estimated at 400–450 lb/acre for both swards.