Claim · model-written summary
K-polyphosphate mix foliar spraying reduced soybean yield by 10.9% on average over two sites.
- Taxon
- soybeans
Glycine maxe0 - Treatment
- Three sprayings of a mixture containing 28, 2.9, 9.5, and 1.7 kg N, P, K, and S/hae1
- Outcome
- yielde1
- Direction
- decreasee1
- Value
- 10.9%e1
- Qualifier
- average (two sites)e1
- Setting
- Coastal Plain region of Georgiae7
Not reportedComparator
Verbatim
e0“of soybeans [ Glycine max (L.) Merr.] in Iowa”
e1“Three sprayings of a mixture containing 28, 2.9, 9.5, and 1.7 kg N, P, K, and S/ha resulted in an average (two sites) yield decrease of 10.9% for the K‐polyphosphate mix and 17.6% for the NH 4 ‐polyphosphate mix”
e7“Field experiments were conducted on a Tifton sl (fine‐loamy, siliceous, thermic, Plinthic Paleudult) and on a Norfolk sl (siliceous, thermic, Typic Paleudult) in the Coastal Plain region of Georgia”
Title
Foliage Injury, Nutrient Intake, and Yield of Soybeans as Influenced by Foliar Fertilization1
M. B. Parker; F. C. Boswell Agronomy Journal 1980. doi:10.2134/agronj1980.00021962007200010022x
Other claims from this paper (8)
- Intervention effect NH4-polyphosphate mix foliar spraying reduced soybean yield by 17.6% on average over two sites.
- Intervention effect All foliar spray treatments damaged soybean foliage, most with repeated application.
- Intervention effect Spray treatments did not affect soybean pod, whole-plant or seed weight, or seed quality.
- Observation Absorption of applied nutrients into soybean leaf tissue and translocation to reproductive tissue were detected only in a few instances.
- Intervention effect Foliar spraying increased nitrogen levels in soybean seeds only.
- Intervention effect Foliar spraying increased phosphorus levels in soybean leaves only.
- Intervention effect Foliar spraying did not change potassium levels in soybean.
- Recommendation Foliar N, P, K and S fertilization of soybean does not appear practicable for increasing yields under the study conditions.