Claim · model-written summary
Copper addition increased soybean leaf chlorophyll readings relative to no addition.
- Organ / stage
- 3rd uppermost leafe0
- Treatment
- Cue0
- Outcome
- Chlorophyll (SPAD 502) valuese0
- Direction
- greatere0
- Comparator
- 0 ppm treatmente0
Not reportedTaxonMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Verbatim
e0“Chlorophyll (SPAD 502) values of the 3rd uppermost leaf during the R3 to R5 growth stages were greater when Cu, Mn, and Zn were added to the soil than in the 0 ppm treatment.”
Title
COPPER, MANGANESE, AND ZINC FERTILIZATION EFFECTS ON GROWTH OF SOYBEAN ON A CALCAREOUS SOIL
J. J. Heitholt; J. J. Sloan; C. T. MacKown Journal of Plant Nutrition 2002. doi:10.1081/pln-120006054
Other claims from this paper (14)
- Observation Soybean leaves without added copper became chlorotic by growth stage R5.
- Intervention effect Manganese addition increased soybean leaf chlorophyll readings relative to no addition.
- Intervention effect Zinc addition increased soybean leaf chlorophyll readings relative to no addition.
- Intervention effect Copper at 25 to 100 ppm increased soybean fruit yield over the check.
- Intervention effect Manganese at 20 to 40 ppm increased soybean fruit yield over the check.
- Intervention effect Zinc at 4 to 8 ppm increased soybean fruit yield over the check.
- Intervention effect Copper at 25 to 100 ppm increased soybean total biomass.
- Intervention effect Manganese showed only a trend toward increased soybean biomass.
- Intervention effect Zinc showed only a trend toward increased soybean biomass.
- Observation Higher copper rates showed no evidence of reduced soybean growth.
- Observation Higher manganese rates showed no evidence of reduced soybean growth.
- Observation Higher zinc rates showed no evidence of reduced soybean growth.
- Mechanism The authors suggest a combination of micronutrients may further increase soybean yield.
- Recommendation The authors recommend field studies of copper, manganese, and zinc effects on soybean yield on this calcareous soil.