Edaphic stressful factors of North-East European part of Russia and the problems of plant selection

The stressful factors were presented which are typical for soils of North-East European part of Russia. The data about the effect of different chemical elements on a growth and a development of plants are given. The authors consider the features of field estimations of plants' adaptivity to soil stress and also the availability and the balance of elements of mineral nutrition. The plants reactions on edaphic stresses in connection with soil properties were described. The problem of creation of varieties resistant to fungous diseases including root rots was discussed.