Claim · model-written summary
Mean yield of tubers over 55 mm from foliar Cu was less than from soil-applied Cu by 7.5 t ha−1 in 1987.
- Taxon
- Solanum tuberosum
Solanum tuberosume0 - Treatment
- foliar-applied Cue2
- Outcome
- mean potato yield of tubers over 55 mme2
- Direction
- less thane2
- Value
- 7.5e2
- Qualifier
- 1987e2
- Comparator
- soil applied Cue2
- Setting
- P.E.I.e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor role
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field experiments were conducted on potatoes (Solanum tuberosum L.) at two locations in P.E.I.”
e2“The mean potato yield of tubers over 55 mm from the foliar-applied Cu treatments was less than the soil applied Cu by 4.5, 0.74, and 7.5 t ha −1 for 1985, 1986, and 1987, respectively”
Title
COPPER AND ZINC NUTRITION OF RUSSET BURBANK POTATOES GROWN ON PRINCE EDWARD ISLAND
J. B. SANDERSON; UMESH C. GUPTA Canadian Journal of Plant Science 1990. doi:10.4141/cjps90-042
Other claims from this paper (14)
- Intervention effect Foliar Cu at 0.5–2 kg ha−1 reduced total tuber yield, number of tubers over 55 mm and average tuber weight.
- Intervention effect Foliar Cu at 0.5–2 kg ha−1 reduced specific gravity of potato tubers.
- Intervention effect Mean yield of tubers over 55 mm from foliar Cu was less than from soil-applied Cu by 4.5 t ha−1 in 1985.
- Intervention effect Mean yield of tubers over 55 mm from foliar Cu was less than from soil-applied Cu by 0.74 t ha−1 in 1986.
- Observation Toxic Cu concentrations in potato leaves ranged from 63 to 139 μg g−1.
- Intervention effect Soil-applied Cu increased tissue Cu in the first sampling.
- Intervention effect Soil-applied Cu had no effect on tissue Cu in the second sampling.
- Intervention effect Foliar Zn at 1–2 kg ha−1 reduced total tuber yield and tuber count over 55 mm.
- Intervention effect Foliar Zn at 1–2 kg ha−1 reduced specific gravity of potato tubers.
- Observation Toxic Zn concentrations in potato leaves ranged from 97 to 224 μg g−1.
- Intervention effect In the first sampling, leaf Zn concentrations were 27 to 70 μg g−1 with soil-applied Zn versus 21 to 30 μg g−1 in the control.
- Intervention effect Soil-applied Zn had no difference in leaf Zn concentration in the second sampling.
- Observation Leaf Cu and Zn concentrations as low as 7 and 21 μg g−1 were not related to nutrient deficiency based on tuber yields.
- Recommendation Soil applications of Cu or Zn appear preferable to foliar sprays for increasing plant Cu or Zn content where a deficiency is suspected.