Evaluating the influence of magnetic iron as an eco-friendly soil amendment applications on agronomic and fruit quality parameters of 'Fremont' mandarin.
Hamdy AE, Mekky AE, Abdel-Aziz HF, Abd El-Wahed AEN, Elnaggar IA
Soil Health
A low-cost soil amendment you could apply around your backyard citrus might cut fertilizer use while nearly doubling your harvest — and the fruit you pick would be juicier and richer in vitamin C.
Researchers treated mandarin orange trees with magnetic iron — a mineral powder worked into the soil — and found the trees grew bigger, stayed healthier under stress, and produced far more fruit. The fruit itself was heavier, juicier, firmer, and sweeter than fruit from untreated trees. Even the trees' leaves showed better nutrition and less strain from salty soil conditions.
Key Findings
Trees receiving 750 g of magnetic iron per tree showed canopy volume increases of over 209% compared to untreated controls across two growing seasons.
Yield increased by up to 71.6% in the highest-dose treatment, with fruits scoring higher on juice volume, firmness, vitamin C, and sugar content.
Leaf nitrogen, phosphorus, and potassium levels rose by 38.7%, 42.3%, and 35.8% respectively, while stress markers like proline and sodium ion accumulation dropped significantly.
chevron_right Technical Summary
Applying magnetic iron to soil around 'Fremont' mandarin trees dramatically boosted growth, yield, and fruit quality. At the highest dose, trees produced 71.6% more fruit with better nutrition, juiciness, and vitamin C than untreated trees.
Abstract Preview
'Fremont' mandarin is highly valued for its early ripening, deep orange peel coloration, and elevated juice content, making it an appealing cultivar for both local markets and international trade. ...
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A mandarin orange, often simply called mandarin, is a small, rounded citrus tree fruit. Treated as a distinct species of orange, it is usually eaten plain or in fruit salads. The mandarin is small and oblate, unlike the roughly spherical sweet orange. The taste is sweeter and stronger than the co...