Claim · model-written summary
Manure increased nitrate and phosphorus contents of alfalfa.
- Taxon
- Alfalfa
Medicago sativae0 - Treatment
- manuree1
- Outcome
- NO 3 − ‐N, and P contents of alfalfae1
- Direction
- increasede1
- Comparator
- 0e2
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alfalfa ( Medicago sativa L. ‘Cody’)”
e1“Yield, NO 3 − ‐N, and P contents of alfalfa were increased by manure”
e2“0, 22, 45, 112, or 224 metric tons/ha of manure”
Title
Nitrate‐nitrogen Removal from Soil Profiles by Alfalfa
A. C. Mathers; B. A. Stewart; Betty Blair Journal of Environmental Quality 1975. doi:10.2134/jeq1975.00472425000400030026x
Other claims from this paper (6)
- Observation Soil nitrate was present to 6 m, concentrated mainly in the upper 1.8 m at 100 to 2,400 kg/ha.
- Observation Alfalfa removed water and nitrate to 1.8 m in the first year.
- Observation Alfalfa removed water and nitrate to 3.6 m in the second year.
- Observation The authors infer that alfalfa could remove deep nitrate where annual crops were ineffective.
- Intervention effect Manure increased alfalfa yield.
- Association Total nitrogen uptake was directly related to yield.