RICE WATER RUSTIRON FERTILIZERS ONION SHELLS FERTILIZER - MYTH OR REAL

Is it possible to fertilize a rusty iron by putting it in water? Are there any phytonutrients in onion peel? Is rice water used as a fertilizer? Questions that bother us.
Information claiming that using onion peel infusion will meet the potassium needs of plants, the belief in natural agriculture surrounds. Because this onion peel infusion, which is far from being a potash fertilizer, is used not as a fertilizer but as a 'Preventive Measure'. It is very clear that those who think copy-paste information in the virtual environment are correct and recommend them do not research the subject in depth.
Onion Skin Infusion is a simple to make but very effective infusion.
We took a closer look at 'iron manure', which is claimed to be formed by keeping rusty nails and wires in water for a while. We have not neglected to present why plants suffer from iron deficiency and to offer solutions.
I think that many of the methods used in the past should be investigated, their reasons and how they are useful. Because an irrelevant move actually triggers another reaction, resulting in correct results. It seems to me much more correct to find the way to the real right result. This subject, namely 'making iron manure by putting rusty nails and wires in water' or 'putting rusty iron nails into the soil' is a myth, but a harmless one. Doing it will not cause a bad result, but it is not beneficial either.
If we look at the availability of iron in the soil;
Iron is the fourth most abundant element in the earth's crust and the first most abundant element in agricultural soils. But we always come across iron deficiencies of plants. So why do plants suffer from iron deficiency when there are so many iron elements?
Actually, this has a very technical and detailed explanation, but if we try to make it more understandable;
One of the most important causes of iron deficiency is that the iron in the soil is not in a form that plants can use, and some elements in the soil bind iron and make it difficult for them to take up