Im curious. How do you know exactly how much of the metals you are giving the trees if any at all?

My poncirus tree starts getting yellowish leave. I give it a tablespoon of this fluid after all chemical reactions have stopped,. With in a week the leaves green up and the new leaves start out green. After about another month the new leaves start coming out yellow and I hit it again. The kumquat trees do not show this as quick but they are also sensitive and I treat it when my PT are in need. The smart thing to do is graft my meiwa kumquat to the PT's but after about 30 attempts I decided to grow nagami s for interstock and try again. Buying a tree is not an $$$-option.

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MY PONCIRUS TRIFOLIATA

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Here is a link that might be useful: https://plus.google.com/photos/111099372377958308731/albums/5869826671114565057/5869826835853592178?banner=pwa

Should the eggshells be composted and aged first

I've always understood that eggshells do help add calcium to soil in the LONG run but would not break down quickly enough to help soon - especially for container plants.

you are better off using gypsum

Thanks fellow citrus'ers, for responding and helping out. with my question. I think its to the compost pile for the eggshells and I'll stick to more readily available nutrients for my citrus trees