Claim · model-written summary
N fertilization gave only a small increase in onion bulb yield because residual soil nitrate was high.
- Taxon
- onion
Allium cepae0 - Treatment
- N fertilizatione1
- Outcome
- bulb yielde1
- Direction
- increasee1
- Qualifier
- only a smalle1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Furrow‐irrigated onion ( Allium cepa L.)”
e1“Because residual soil NO 3 –N was high, N fertilization resulted in only a small increase in bulb yield”
Title
Nitrogen Fertilizer Use Efficiency of Furrow‐Irrigated Onion and Corn
Ardell D. Halvorson; Ronald F. Follett; Michael E. Bartolo; et al. Agronomy Journal 2002. doi:10.2134/agronj2002.4420
Other claims from this paper (10)
- Observation Onion dry matter accumulation was slow until about late May and then increased rapidly with biomass production and N uptake.
- Observation Onion N demand was greatest during bulb development.
- Observation Onion recovered 11 and 19% of fertilizer N from the May and June applications.
- Observation Average onion fertilizer N recovery was 15%.
- Observation Much of the fertilizer N remained in the upper 60 cm of the soil profile at harvest and had moved toward the onion bed center.
- Observation Fertilizer 15N detected at 180 cm depth indicated leaching losses from the root zone.
- Observation The unfertilized 1999 corn crop recovered 24% of the fertilizer N applied to onion.
- Observation Total fertilizer N uptake by the two crops was 39%.
- Recommendation Delaying N fertilizer application until onion bulbing begins may improve NFUE.
- Recommendation Planting corn directly on the previous onion bed may give greater N fertilizer recovery by corn.