Olive DEMO trial series (D): AMALGEROL enhances yield and vegetative growth in 10-year-old olive trees

A 2018 field trial in Arahal, Seville (Southern Spain) evaluated the efficacy and safety of AMALGEROL, applied via drip irrigation, on mature olive trees (10 years old).

Conducted under commercial growing conditions, the study compared AMALGEROL (applied twice in spring at 20-day intervals) to untreated local farmer practices.

Key objectives included assessing crop health, yield improvements, phytotoxicity risks, and environmental safety.

Results revealed significant benefits from AMALGEROL. Treated trees exhibited stronger vegetative growth, with side shoot numbers increasing by 8.9–9.9% and their length rising by 7.4–12.7% compared to the control. Terminal shoots, after an initial slight dip, grew 5.7–7.3% longer by late assessments. Crop vigor remained consistently robust (100% vs. the control’s decline to 95%), indicating sustained plant health. Yield and fruit quality improvements were equally notable. 

AMALGEROL-treated plots produced 11.9% more fruit (14,438 kg/ha vs. 12,901 kg/ha), with olives showing superior size (521 vs. 482 fruits per 1.0 kg) and higher oil potential (19.9% vs. 18.6% fat content). Crucially, no phytotoxicity or adverse effects on crop safety were observed, and the trial confirmed no impact on non-target organisms, reinforcing its environmental compatibility. AMALGEROL demonstrates a clear advantage in boosting olive tree productivity and resilience. Its ability to enhance both vegetative growth and yield quality, paired with a strong safety profile, makes it a valuable tool for sustainable olive farming.