I'm trying to cultivate pistacia vera.
I found a lot of informations about fertilization and finally I have a N-P-K table of values for each plant for each year (from the first year up to the 7th year).
From the first to the 7th (or about the 10th) year plants do not produce fruits.
These values are based on a Californian study on Californian soils.
So my question is: are these values valid also for me in center Italy, or the macroelements values changes according to the soil where it is cultivated?
Then, I find values as grams/square meter and as grams/plants: have I to distribute fertilizer evenly or concentrated around the plants?
This study talks about N and microelement for the first 7 years, and only after the 7th year, when the plant should start to produce fruits, it introduces P and K elements.
So it means that before the beginning of the production of fruits I don't have to give P and K elements?For the first 7 years (or untill the plant doesn't start to produce fruits) the plant doesn't need P and K elements?
Lastly, now I have only rootstock (p. terebinthus) and I'm going to plant next year: have I to fertilize them?Have I to use the same values for grafted plants?When I'm going to plant rootstocks in orchard, have I to make a "deep soil fertilization" and with what fertilizers and what quantity?
In this study is used a liquid fertilizer for macroelements, it's the same if I use granular fertilizers?