Abstract
The goal of this study was to examine how to improve the vegetative growth, nutritional status, productivity, and fruit quality of Washington navel orange trees by examining the effect of foliar application of ZnSO4 (0, 300, and 600 mg/L) solutions in combination with CuSO4 (0, 200, and 400 mg/L) solutions on Washington navel orange trees, which were 11 years old and grown in clay loam soil with a surface irrigation system. The results showed that all the investigated measurements responded specifically to each investigated factor. ZnSO4 elicited a stronger and more effective response than CuSO4. Nonetheless, the response varied only slightly or moderately from one measurement to the next. In terms of the interaction effect between ZnSO4 and CuSO4 concentrations, the effect of each investigated factor was directly reflected in its combinations, with ZnSO4 (600 mg/L) and CuSO4 (200 and 400 mg/L) being the most effective for the majority of the measurements under consideration. When the highest level of ZnSO4 was combined with the highest level of CuSO4, the highest values for the various vegetative growth parameters shoot length and diameter, number of leaves per shoot, leaf area, and total assimilation area per shoot were obtained. As a result, the nutritional status (the highest total leaf chlorophyll and leaf mineral contents) was significantly coupled with the treatment of 600 mg/L ZnSO4 in combination with 400 mg/L CuSO4. Moreover, the combinations of the highest ZnSO4 concentration (600 mg/L) and CuSO4 concentration (400 mg/L) exhibited the greatest statistical values of the measurements of fruiting aspects as well as fruit quality. Consequently, it can be recommended that using 600 mg/L ZnSO4 in combination with 400 mg/L CuSO4 as a foliar spray on monthly basis during the period from March to July could be safely recommended under similar environmental conditions and horticulture practices adopted in the present experiment.
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Claims 7
Claim · model-written summary
ZnSO4 elicited a stronger and more effective response than CuSO4 in Washington navel orange trees.
- Taxon
- Citrus sinensis L.
Citrus sinensist0 - Treatment
- ZnSO4e0
- Outcome
- responsee0
- Direction
- strongere0
- Comparator
- CuSO4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“ZnSO4 elicited a stronger and more effective response than CuSO4”
t0“Washington Navel Orange Trees (Citrus sinensis L.)”
Claim · model-written summary
ZnSO4 at 600 mg/L with CuSO4 at 200 and 400 mg/L was the most effective combination for the majority of measurements.
- Taxon
- Citrus sinensis L.
Citrus sinensist0 - Treatment
- ZnSO4 (600 mg/L) and CuSO4 (200 and 400 mg/L)e0
- Outcome
- the majority of the measurementse0
- Direction
- most effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“with ZnSO4 (600 mg/L) and CuSO4 (200 and 400 mg/L) being the most effective for the majority of the measurements under consideration”
t0“Washington Navel Orange Trees (Citrus sinensis L.)”
Claim · model-written summary
The highest ZnSO4 level combined with the highest CuSO4 level gave the highest shoot length, shoot diameter and number of leaves per shoot.
- Taxon
- Citrus sinensis L.
Citrus sinensist0 - Treatment
- the highest level of ZnSO4 was combined with the highest level of CuSO4e0
- Outcome
- shoot length and diameter, number of leaves per shoote0
- Direction
- the highest valuese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“When the highest level of ZnSO4 was combined with the highest level of CuSO4, the highest values for the various vegetative growth parameters shoot length and diameter, number of leaves per shoot”
t0“Washington Navel Orange Trees (Citrus sinensis L.)”
Claim · model-written summary
The highest ZnSO4 level combined with the highest CuSO4 level gave the highest leaf area and total assimilation area per shoot.
- Taxon
- Citrus sinensis L.
Citrus sinensist0 - Treatment
- the highest level of ZnSO4 was combined with the highest level of CuSO4e0
- Outcome
- leaf area, and total assimilation area per shoote0
- Direction
- the highest valuese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“When the highest level of ZnSO4 was combined with the highest level of CuSO4, the highest values for the various vegetative growth parameters shoot length and diameter, number of leaves per shoot, leaf area, and total assimilation area per shoot were obtained”
t0“Washington Navel Orange Trees (Citrus sinensis L.)”
Claim · model-written summary
The highest total leaf chlorophyll and leaf mineral contents were significantly coupled with 600 mg/L ZnSO4 combined with 400 mg/L CuSO4.
- Taxon
- Citrus sinensis L.
Citrus sinensist0 - Treatment
- 600 mg/L ZnSO4 in combination with 400 mg/L CuSO4e0
- Outcome
- total leaf chlorophyll and leaf mineral contentse0
- Direction
- the higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“the nutritional status (the highest total leaf chlorophyll and leaf mineral contents) was significantly coupled with the treatment of 600 mg/L ZnSO4 in combination with 400 mg/L CuSO4”
t0“Washington Navel Orange Trees (Citrus sinensis L.)”
Claim · model-written summary
The combination of 600 mg/L ZnSO4 and 400 mg/L CuSO4 gave the greatest values for fruiting aspects and fruit quality.
- Taxon
- Citrus sinensis L.
Citrus sinensist0 - Treatment
- the highest ZnSO4 concentration (600 mg/L) and CuSO4 concentration (400 mg/L)e0
- Outcome
- fruiting aspects as well as fruit qualitye0
- Direction
- the greatest statistical valuese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“the combinations of the highest ZnSO4 concentration (600 mg/L) and CuSO4 concentration (400 mg/L) exhibited the greatest statistical values of the measurements of fruiting aspects as well as fruit quality”
t0“Washington Navel Orange Trees (Citrus sinensis L.)”
Claim · model-written summary
The authors recommend 600 mg/L ZnSO4 with 400 mg/L CuSO4 as a monthly foliar spray from March to July under similar conditions.
- Taxon
- Citrus sinensis L.
Citrus sinensist0 - Outcome
- 600 mg/L ZnSO4 in combination with 400 mg/L CuSO4 as a foliar spray on monthly basis during the period from March to Julye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“using 600 mg/L ZnSO4 in combination with 400 mg/L CuSO4 as a foliar spray on monthly basis during the period from March to July could be safely recommended”
t0“Washington Navel Orange Trees (Citrus sinensis L.)”
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See all 9 papers →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.