Walnut species in the fergana valley, their botanical characteristics

The mountains, hills, and deserts that surround the valley vary in environmental conditions, soils, precipitation, and other characteristics.. Accordingly, the organs of plants are collected knowing when they accumulate the most substances. Therefore, it is not recommended to collect it at any time. In order to have a complete knowledge, we need to have sufficient knowledge of their comprehensive biology (growth, development, productivity, agrotechnics, methods of reproduction, promising varieties), ecology (their living conditions). Both species have produced a large number of species and varieties as a result of natural selection. These varieties are slightly higher than the varieties grown in countries such as France, Bulgaria, Germany, America.