DIFFERENT METHODS OF WALNUT REPRODUCTION (SURVEY)
Juglans species appearance goes back to the deep ancient times, separated from our time by tens of thousands years, and in those days this species was widely distributed around the globe [3]. Natural thickets of walnuts in the Northern hemisphere are scattered today, starting from the territory of China, Kazakhstan, Kirghizia, Uzbekistan, Tajikistan, Turkmenia, Iran, Azerbaijan, Armenia, Georgia, Ukraine (Crimea) and ending with the countries of Balkan peninsula, in the Southern - in South America: Colombia, Ecuador, Peru, Brazil. The walnut culture has been known in China and India since time immemorial. The first historical information about the walnut culture is connected with the territory of Central and Asia Minor, from where this plant penetrated to the Western European countries through Iran and Greece. Many mentions about walnuts are met at Cicero, Pliny, Virgil and other researchers of ancient Greece and Rome. In ancient Greece, and later in the Roman Empire, walnut was widespread already in the first centuries of our era. Much earlier, more than four thousand years ago, the nut grew in the famous "hanging gardens" of Babylon. The walnut was apparently brought to ancient Russia by Greek merchants around ten centuries ago. Walnut trees trees are rather popular among the gardeners, as well as it is a promising crop among the farmers. Due to its diversity and great potential it can be found in the southern regions and the Northern territories, some cases also occur in Siberia. Having been in great demand recently, special attention has been paid to the study of various forms of reproduction. As well as other crops, walnut has two methods of reproduction: seed and vegetative. Seed reproduction is also subdivided into autumn and spring.