Claim · model-written summary
Fertilizer nitrogen increased corn yield.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- Fertilizer Ne0
- Outcome
- corne0
- Direction
- increasede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer N and P increased corn and wheat yields, respectively”
Title
Rotation versus monoculture of irrigated corn crops in relation to energy input and economic return
Wallace Richard Peterson Lincoln (University of Nebraska) 1989
Other claims from this paper (17)
- Intervention effect Rotation corn yield was 20 percent higher than continuous corn at optimum nitrogen rate.
- Intervention effect Fertilizer phosphorus increased wheat yield.
- Intervention effect Fertilizer nutrients did not affect soybean yield.
- Association Corn grain protein content was related to applied nitrogen rate.
- Association Wheat grain protein content was related to applied nitrogen rate.
- Association Continuous corn return over variable costs was slightly lower than crop rotation.
- Association Return variability was lower for crop rotation than continuous corn.
- Observation Continuous corn required 3183 Mcal per acre of energy input.
- Observation Rotation corn required 3271 Mcal per acre of energy input.
- Observation Soybean required 1123 Mcal per acre of energy input.
- Observation Wheat required 763 Mcal per acre of energy input.
- Observation Nitrogen fertilizer accounted for 33% of corn production energy use.
- Observation Irrigation accounted for 28% of corn production energy use.
- Association Continuous corn was more affected by energy price increases than rotation.
- Intervention effect Manure or fertilizer increased soil nutrient test levels over seven years.
- Association Crop yields did not respond to increased soil nutrient test levels.
- Recommendation The authors recommend the sufficiency concept for fertilizer decisions based on soil nutrient levels.