Claim · model-written summary
Spring soil nitrate increases after oilseed radish did not differ substantially from no cover crop.
- Treatment
- oilseed radishe0
- Outcome
- Soil NO 3 −N concentration increasese0
- Direction
- did not differ substantiallye0
- Comparator
- a cover crop had not been establishede0
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil NO 3 −N concentration increases between the May and June sample dates following annual ryegrass and oilseed radish did not differ substantially from where a cover crop had not been established”
e1“corn ( Zea mays L.)”
Title
Soil Nitrate Accumulation and Corn Response to Preceding Small‐Grain Fertilization and Cover Crops
Tony J. Vyn; Ken J. Janovicek; Murray H. Miller; et al. Agronomy Journal 1999. doi:10.2134/agronj1999.00021962009100010004x
Other claims from this paper (8)
- Intervention effect More N fertilizer on the previous small-grain crop rarely increased spring soil nitrate or corn yield.
- Intervention effect Spring soil nitrate increases after annual ryegrass did not differ substantially from no cover crop.
- Intervention effect Red clover produced at least 2.8 times greater spring soil nitrate increases than no cover crop.
- Intervention effect Corn biomass N at anthesis after annual ryegrass was 25.6 kg ha −1 less than without cover crop.
- Intervention effect Corn biomass N at anthesis after red clover was 40.4 kg ha −1 greater than without cover crop.
- Intervention effect Corn yields were consistently highest after red clover.
- Intervention effect Corn yields were often lowest after annual ryegrass.
- Association Corn yield response correlated positively with June soil nitrate concentration.