Claim · model-written summary
The greatest increase in hearted lettuce occurred with both molybdenum and sulphur-coated urea.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- sulphur-coated ureae0
- Outcome
- proportion of hearted lettucee0
- Direction
- greateste0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in the proportion of hearted lettuce was greatest in plots also receiving sulphur-coated urea.”
Title
Some Responses of Lettuce, Grown in Beds of Peat, to Nitrogen, Potassium, Magnesium and Molybdenum
P. Adams; C. J. Graves; G. W. Winsor Journal of Horticultural Science 1978. doi:10.1080/00221589.1978.11514829
Other claims from this paper (10)
- Intervention effect Applied nitrogen increased lettuce yield and hearting until peat reached 60 mg N I-1.
- Mechanism Higher nitrogen concentrations were unfavorable in two crops because peat acidity increased manganese uptake.
- Association Lettuce yield and hearting and marketability declined as leaf manganese increased.
- Intervention effect The third crop had little nitrogen response between 60 and 250 mg N I-1.
- Intervention effect Potassium improved yield and quality up to 200 mg K I-1 in peat.
- Intervention effect Potassium up to 600 mg K I-1 had little further yield or quality effect.
- Observation Leaf nitrogen and potassium at maximum yield were 5% and 8%, respectively.
- Intervention effect Added magnesium produced no lettuce response.
- Intervention effect Molybdenum increased lettuce yield and hearting under the heaviest Nitrochalk dressing.
- Association Water-soluble peat phosphate rose from 19 to over 50 mg P I-1 as peat pH declined with nitrogen application.