METHODS AND TECHNIQUES FOR DETERMINING THE COMMERCIAL GRADE OF CLONAL ROOTSTOCKS OF FRUIT CROPS
The article provides an overview of the main methods and techniques for determining the commercial grade of clonal rootstocks of fruit crops used in various regions of the world. The main indicators for grading rootstocks are the diameter of the stem at the site of future grafting or the diameter in the area of the root collar, as well as the degree of root development. The main quantitative parameters of clonal rootstocks of pome crops are considered in accordance with the current Russian state standard GOST R 53135-2008. The use of high-quality clonal rootstocks in nursery allows to obtain one-dimensional planting material of fruit crops, significantly increasing the profitability of production.