Abstract
The impact of foliar zinc fertilizer application on nut-bearing black walnut (Juglans nigra L.) trees was studied. Foliar sprays were applied three times per season on two cultivars during four growing seasons by wetting the foliage of the entire crown using a tank mix containing 500 ppm zinc, starting at leaf burst and continuing at 2 week intervals. The fertilizer treatment increased leaf zinc levels but did not impact nut production. Results from this trial indicate that the zinc standard for black walnut foliar nutrient analysis may be similar to the zinc standard of 25 to 100 ppm established for Persian walnut (J. regia L.).
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 3
Claim · model-written summary
Foliar zinc fertilizer increased leaf zinc levels.
- Taxon
- black walnut
Juglans nigrat0 - Treatment
- fertilizer treatmente0
- Outcome
- leaf zinc levelse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fertilizer treatment increased leaf zinc levels but did not impact nut production”
t0“Influence of foliar fertilization on walnut foliar zinc levels and nut production in black walnut”
Claim · model-written summary
Foliar zinc fertilizer did not impact nut production.
- Taxon
- black walnutJuglans nigrat0
- Treatment
- fertilizer treatmente0
- Outcome
- nut productione0
- Direction
- did not impacte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fertilizer treatment increased leaf zinc levels but did not impact nut production”
t0“Influence of foliar fertilization on walnut foliar zinc levels and nut production in black walnut”
Claim · model-written summary
The authors infer that a black walnut foliar zinc standard may resemble the Persian walnut standard of 25 to 100 ppm.
- Taxon
- black walnutJuglans nigrae0
- Outcome
- zinc standard for black walnut foliar nutrient analysise0
- Value
- 25 to 100 ppme0
- Qualifier
- may be similare0
- Comparator
- Persian walnut (J. regia L.)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the zinc standard for black walnut foliar nutrient analysis may be similar to the zinc standard of 25 to 100 ppm established for Persian walnut (J. regia L.)”
The same questions in other papers
fertilization · yield · Juglans nigra (black walnut)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.