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Originally Posted by Want Them All
Where can I get humic or fulvic acid? Will applying these "burn" the existing plants?
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You can obtain it locally from agricultural supply distributors or pay extra for shipping online. (On my site it is
Soil Builder 2-1-1). It is applied to the soil, usually underneath the mulch layer. Typical application rates are 1/4 tsp to 1 tbsp per gallon. At that rate, it does not burn. It should not be applied within a week of other fertilizers (esp. solid granulars) because they will interact to make tar!
Quote:
Originally Posted by Want Them All
If the moisture gauge give false reading in clay soil, what can one do to get accurate reading, aside from actually diging up the clay soil to see it directly (that would be too laborious with all the trees I have ).
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If the plant leaves start to yellow uniformly -- perhaps with brown edges, then the soil is too dry. If the leaves are green but with brown edges, it is likely overdose of fertilizer or some contaminant like herbicide or fluoridated city water. If the leaves begin to yellow but the major veins are green, then it is too much water. All of this is a matter of experience for you. If you are really concerned, take a pointed shovel and drive it straight down about 30 inches from a young plant or 3-4 feet from an established plant. Don't dig up the soil, just tilt the shovel a bit so you have an inch-wide opening to peer down into.