Claim · model-written summary
Plant-top dry weight was highest at 20% shade and declined curvilinearly with more shade.
- Taxon
- Soybeans
Glycine maxt0 - Treatment
- 20% shadee0
- Outcome
- dry weight of plant topse0
- Direction
- higheste0
- Qualifier
- decreased curvilinearly as shading increasede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average TNA and dry weight of plant tops were highest at 20% shade (99.3 Klux) and decreased curvilinearly as shading increased”
t0“Soybeans”
Title
Effects of Shading on the N2‐Fixation, Yield, and Plant Composition of Field‐Grown Soybeans1
T. A. T. Wahua; D. A. Miller Agronomy Journal 1978. doi:10.2134/agronj1978.00021962007000030006x
Other claims from this paper (15)
- Intervention effect Shading accelerated loss of total nodule nitrogen-fixing activity during development.
- Intervention effect Mean total nodule activity was highest at 20% shade and decreased as shading increased.
- Association Specific nodule activity fell linearly as shade increased.
- Intervention effect At 20% shade soybean grain yield was 90% of unshaded plants.
- Intervention effect At 47% shade soybean grain yield was 75% of unshaded plants.
- Intervention effect At 63% shade soybean grain yield was 48% of unshaded plants.
- Intervention effect At 80% shade soybean grain yield was 18% of unshaded plants.
- Intervention effect At 93% shade soybean grain yield was 2% of unshaded plants.
- Intervention effect Seed protein and oil content were virtually unchanged over 20-80% shade.
- Intervention effect Seed protein percentage was highest at 93% shade.
- Intervention effect Seed oil percentage was lowest at 93% shade.
- Association Pods per plant, leaf nitrogen, stem nitrogen, total nodule activity and yield were highly correlated with shading.
- Association Soybean nitrogen fixation positively correlated with seed protein content (r = 0.77).
- Association Soybean nitrogen fixation negatively correlated with seed protein (r = −0.44), as separately stated in the abstract.
- Recommendation Authors recommend at least 80% ambient illumination at 50 cm for substantial soybean fixation.