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By the way adding cow manure to the mulch boxes in the fruit orchard is also with no many minerals. Our soil lacks Ca, Mg B, Cu and Zn to name a few. All this adds to the cost of making good fruit.

I am thinking of purchasing a different system, say wicking beds, grow the fruit trees on top in mulch boxes of soil and into the wicking bed you add hydroponic solutions of minerals, which cost the same as getting bulky useless cow manure. For example for $80 you get 30 minerals in hydroponics and enough to make 2000 litres of water into a wicking bed. You feed the trees for 3 months before draining the water and adding another brand new batch cost another 2000 litres of water and minerals for another $80. Same cost but much more valuable in terms of minerals supplied. What is in cow manure? All gathered across the poorest soils of Australia? Not much.