Claim · model-written summary
Returned stover depressed yields when fertilizer nitrogen was absent.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- stovere0
- Outcome
- yieldse0
- Direction
- depressede0
- Qualifier
- Where fertilizer N was not appliede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Where fertilizer N was not applied, stover depressed yields”
e1“preceding corn ( Zea mays L.) crop”
Title
Effects of Corn Stover, Manure, and Nitrogen on Soil Properties and Crop Yield1
J. W. Ketcheson; E. G. Beauchamp Agronomy Journal 1978. doi:10.2134/agronj1978.00021962007000050003x
Other claims from this paper (14)
- Intervention effect Manure without nitrogen fertilizer produced yields comparable with any other treatment.
- Intervention effect With nitrogen fertilizer, returned stover slightly raised yields relative to removal.
- Intervention effect Returning stover did not increase fertilizer nitrogen requirements at normal rates.
- Intervention effect Fertilizer nitrogen narrowed the stover residue carbon to nitrogen ratio.
- Intervention effect Additional nitrogen did not increase total nitrogen in grain or soil.
- Method / resource A square root term for applied nitrogen fit most grain and nitrogen yield responses, except most manure treatments.
- Method / resource Manure treatments required square and cube terms for nitrogen response fits.
- Intervention effect Residual nitrogen yielded more without stover than with stover.
- Observation Soil organic matter declined over the experiment.
- Intervention effect Stover and manure reduced the decline in soil organic matter.
- Intervention effect Applied nitrogen did not conserve soil organic matter.
- Intervention effect Applied nitrogen increased soil inorganic nitrogen.
- Intervention effect Stover and manure increased water stable aggregation.
- Recommendation Annual liquid poultry manure at 112 kg/ha nitrogen removed the need for fertilizer nitrogen.