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Vegetable Growing : Site and Soil
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Boron and molybdenum deficiency
My sister in Scotland had a soil lab test done for her veg garden recently. The results showed the soil had only 1.01% Boran and 0.03% Molybdenum. The lab reccomended levels of 2.1% and 0.6% respectively. All other elements were OK.
How does she increase her levels. Are there any propritiary brand products available ? What should she do ?
Ivor, Staplestown, Co Carlow Posted: 05/06/2012
While the test figures were on the low side for these micronutrients, they are still sufficient.
Molybdenum deficiency is very rare, usually occurring in cauliflower which developes narrow leaves, a condition known as 'whip-tail'.
Boron deficiency is more common causing borwn spotting in apple flesh, cracks in turnips and celery and otehr vegetables especially the cabbage family.
Check the pH and apply lime if it is acidic. The ideal pH for most vegetables is about pH 6.5 to 7.0, a point lower for fruit trees. Soil releases suitable levels of these nutrients at pH 7.
To add back micronutrients use garden compost or farm manure, or apply comfrey or nettle tea.
Or you can apply borax powder at 3g per square metre, every few years, if a deficiency appears despite other measures.