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After 60 days from the flowering stage, the soluble sugars and starches of high-yielding trees decreased Iranian Pistachio in all organs, and during this period (pistachio fruit growth period), the organs of low-yielding trees began to accumulate larger amounts of soluble sugars and starches. Their amount increases in relation to the limbs of fruit trees. Status of budding trees in trees in Kerman, California California is the second largest producer of pistachios in the world and 99% of all pistachios produced in the United States belong to this state. Kerman pistachio is the largest cultivar cultivated in California. Inflorescence buds in pistachios are formed on the growth branches of the current year and about 30 to 40% of flower buds produced in high and low load conditions in the early growing season fall at the same time as woody inside. کردن. In the crucial stage of bud shedding, 50% of bud shedding occurs only on fertile trees. Therefore, these trees will have little yield next year. This stage of shedding occurs simultaneously with the rapid growth of the embryo and causes unfavorable annual growth in pistachio trees.