Walnut fruit received the nutrients needed by it from air via the organs over the root, thus via its leaves, and from the soil, where they are grown up, via their roots. When the nutrient amount received from the soil or air is insufficient, then they need fertilization.
Macro elements and micro elements, which are required for the growth of our plants and for achieving a good yield, are applied to our soil through fertilization.
Walnut saplings and trees also need both macro and micro elements within the scope of walnut cultivation.
Macro Elements are Nitrogen (N), Phosphor(P), Potassium(K), Calcium (Ca), Magnesium (Mg), Sulphur (S), and Sodium(Na).
Micro Elements are Boron (B), Iron (Fe), Copper (Cu), Zinc (Zn), Mangan (Mn), Molybdenum (Mo), Nickel (Ni), Chlorine (Cl), and Selenium (Se).
Walnut trees are excessively sensitive against some of the abovementioned macro and micro elements. Lack of these substances has a negative impact on the growth of the walnut tree and on the formation of walnut fruit.
Leaf analysis is the best way to detect the lack of these elements. The information herein is provided to you for a pre-understanding. Some lacks may be similar. In cases you suspect, you must have the leaves to be taken from your walnut tree in sufficient amount analysed at official or reliable private laboratories.