Good afternoon dear friend @solominer
How great that you have all the equipment to be able to measure the quality of the soil in the crop field

When we planted and needed more phosphorus in the soil, we burned tree branches and incorporated the ashes into the soil. We also incorporated it with irrigation, putting the ashes in water, and we used that preparation for irrigation.

When we needed more nitrogen, we used the coffee grounds, or the water released by the air conditioning, we collected the liquid and with that we intensified the watering of our plants.

Very successful in the new planting of garlic

I hope you had a beautiful Christmas