Claim · model-written summary
At 200 lb N/acre, knife injection left more soil nitrate than surface application.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- knife‐injected N at the 200 lb/acre ratee0
- Outcome
- nitrate‐Ne0
- Direction
- much moree0
- Comparator
- surface appliede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plots that received knife‐injected N at the 200 lb/acre rate contained much more nitrate‐N than plots in which N was surface applied”
t0“Corn”
Title
Nitrogen Management in Furrow Irrigated, Ridge‐Tilled Corn
W. B. Gordon; D. A. Whitney; R. J. Raney jpa 1993. doi:10.2134/jpa1993.0213
Other claims from this paper (12)
- Intervention effect Broadcast and dribbled UAN yielded less grain than knife applied or split systems.
- Intervention effect Surface dribbled UAN was no better than broadcasting.
- Intervention effect Split dribbled UAN yielded more than a single preplant dribble.
- Intervention effect Splitting knife UAN application did not alter grain yield.
- Intervention effect AA and UAN knife treatments had similar grain yield, grain N concentration and N removal.
- Association Application method by N rate interaction did not affect yield.
- Intervention effect Higher N rates did not compensate for inefficient application.
- Observation Maximum grain yield occurred at 158 lb N/acre.
- Intervention effect Residual soil nitrate was higher after 200 lb N/acre than 50 or 100 lb N/acre.
- Intervention effect At 200 lb N/acre, knife systems left more inorganic N than surface systems.
- Intervention effect Nitrate amounts did not differ between preplant and split knife UAN.
- Recommendation The authors recommend knife placement of N below residue for ridge tilled corn.