Abstract
The goal of this research was to identify the role essential nutrients play in the physiology of tree crops, and then to apply the nutrient as a foliar fertilizer to stimulate a specific metabolic process at phenological stages when nutrient demand is high. This approach has proven successful. A single winter prebloom foliar application of nitrogen as low-biuret urea [0.16 kg N/tree (0.35 lb N/tree)] to 30-year-old `Washington' navel orange ( Citrus sinensis L. Osbeck) trees during flower initiation significantly increased yield and fruit number per tree for each of 3 consecutive years ( P ≤ 0.05). The number of commercially valuable largesize fruit also increased significantly with yield increases ( r 2 = 0.88). Sodium tetraborate applied foliarly to `Hass' avocado ( Persea americana Mill.) trees at the cauliflower stage of inflorescence development (elongation of inflorescence secondary axes, pollen and ovule development) increased the number of pollen tubes reaching the ovule, ovule viability and cumulative yield ( P ≤ 0.05). Additional examples are presented.
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Claims 5
Claim · model-written summary
Winter urea significantly increased orange yield.
- Taxon
- Citrus sinensis
Citrus sinensise0 - Material
- Washingtone0
- Treatment
- nitrogen as low-biuret urea [0.16 kg N/tree (0.35 lb N/tree)]e0
- Outcome
- yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A single winter prebloom foliar application of nitrogen as low-biuret urea [0.16 kg N/tree (0.35 lb N/tree)] to 30-year-old `Washington' navel orange ( Citrus sinensis L. Osbeck) trees during flower initiation significantly increased yield and fruit number per tree for each of 3 consecutive years ( P ≤ 0.05).”
Claim · model-written summary
Winter urea significantly increased orange fruit number.
Not reportedTaxonTreatmentComparator
Verbatim
e0“significantly increased yield and fruit number per tree for each of 3 consecutive years ( P ≤ 0.05).”
Claim · model-written summary
Commercially valuable large fruit numbers increased significantly.
Not reportedTaxon
Verbatim
e0“The number of commercially valuable largesize fruit also increased significantly with yield increases ( r 2 = 0.88).”
Claim · model-written summary
Foliar sodium tetraborate increased pollen tubes reaching avocado ovules and ovule viability.
- Taxon
- avocado
Persea americanae0 - Material
- Hasse0
- Treatment
- Sodium tetraborate applied foliarlye0
- Outcome
- number of pollen tubes reaching the ovule, ovule viabilitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sodium tetraborate applied foliarly to `Hass' avocado ( Persea americana Mill.) trees at the cauliflower stage of inflorescence development (elongation of inflorescence secondary axes, pollen and ovule development) increased the number of pollen tubes reaching the ovule, ovule viability and cumulative yield ( P ≤ 0.05).”
Claim · model-written summary
Foliar sodium tetraborate increased avocado cumulative yield.
- Taxon
- avocadoPersea americanae0
- Material
- Hasse0
- Treatment
- Sodium tetraborate applied foliarlye0
- Outcome
- cumulative yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sodium tetraborate applied foliarly to `Hass' avocado ( Persea americana Mill.) trees at the cauliflower stage of inflorescence development (elongation of inflorescence secondary axes, pollen and ovule development) increased the number of pollen tubes reaching the ovule, ovule viability and cumulative yield ( P ≤ 0.05).”
The same questions in other papers
nitrogen · yield · Citrus sinensis (sweet orange)Results differ
38 papers in the same direction as this paper · 8 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- negative
44 papers more in this group
See all 48 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.