Foliar application of nano-NPK and calcium-boron during the ‘off-year’ season enhances yield, improves oil quality, and mitigates biennial bearing in ‘Picual’ olive cultivar
Ayman Shaban, Hassan Mahmoud Korkar, Islam Ahmed, Asmaa Gamal Abd El-hamied, Ibrahim Hmmam · 2026
Read Foliar application of nano-NPK and calcium-boron during the ‘off-year’ season enhances yield, improves oil quality, and mitigates biennial bearing in ‘Picual’ olive cultivar by Ayman Shaban, Hassan Mahmoud Korkar, Islam Ahmed, Asmaa Gamal Abd El-hamied, Ibrahim Hmmam (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-13200473.txt.
Description
Ayman Shaban and colleagues tested nano fertilizer sprays on olive trees in a 2026 field study. Olive trees often bear heavily one year and lightly the next, a pattern called alternate bearing. Spray feeding in the off-year might even out yields, so the team sprayed nano NPK and calcium-boron mixes on fifteen-year-old Picual trees.
Trials ran across the 2023 and 2024 seasons. The best blend raised flower counts, perfect flower share, and fruit set above controls. Off-year yield peaked under that blend, while fruit drop fell by about half versus controls. Leaf and fruit mineral levels rose. Oil kept its extra virgin grade with a richer share of oleic acid, its main healthy fat. Alternate bearing severity fell sharply.
Catalog record
| CREATOR | Ayman Shaban, Hassan Mahmoud Korkar, Islam Ahmed, Asmaa Gamal Abd El-hamied, Ibrahim Hmmam |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 71 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |