Claim · model-written summary
The decline in solution pH was considered a likely cause of limited growth with reduced nitrogen.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- reduced N sourcese0
- Outcome
- limited plant growthe0
- Qualifier
- rapid decline of solution pHe0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e0“The rapid decline of solution pH was likely responsible for the limited plant growth with the reduced N sources.”
Title
Improved Soybean Growth in Urea with pH Buffered by a Carboxy Resin1
E. Lahav; J. E. Harper; R. H. Hageman Crop Science 1976. doi:10.2135/cropsci1976.0011183x001600030003x
Other claims from this paper (15)
- Intervention effect Urea caused the least plant injury among tested reduced-nitrogen sources.
- Intervention effect Soybean seedlings grew less with urea than with nitrate.
- Intervention effect Daily pH adjustment did not alter injurious effects.
- Intervention effect Adding calcium-form resin to the urea medium stabilized pH.
- Intervention effect Resin-buffered urea permitted growth equivalent to nitrate-grown soybean seedlings.
- Intervention effect With resin, soybean growth on urea exceeded growth on ammonium salts.
- Intervention effect Soybean growth was equivalent with resin-buffered urea and nitrate.
- Intervention effect Wheat growth was equivalent with resin-buffered urea and nitrate.
- Intervention effect Pea growth was lower with urea than nitrate.
- Intervention effect Velvet leaf growth was lower with urea than nitrate.
- Intervention effect Urea-grown species contained nitrate at about 10% of the nitrate-grown control amount.
- Observation No nitrate was detectable in nutrient solutions.
- Observation In vivo nitrate reductase activity was low across all species.
- Observation In vitro nitrate reductase activity in soybean was 68% of nitrate-grown controls.
- Observation In vitro nitrate reductase activity in peas was 11% of nitrate-grown controls.