The scientific substantiation of biological correction of cultural plant productivity is given in this publication. The plant productivity can be controlled by few kinds of correction: physical, chemical and biological. The physical correction is connected with formation and conservation of soil biological activity, water regime, thermal and aerial conditions, which are necessary for the favorable growth and development of plants. The chemical correction is regulation of cultural plant productivity by chemization. The biological correction is whole of methods of influence on plant biology. This way allows not only to increase the crops with bettering of the agricultural plant quality, but also to increase the safekeeping of the plant growing production. The modern theory of biological correction is based on both known experimentations, and the modern science achievements. The biological correction methodology is based on the following three key positions: 1) green vascular plants are able to absorption and association organic compounds; 2) the unified system of protoplasts permits to plants to absorb of nutrients by both roots, and leaves; 3) the plant productivity is largely determined by the speed of nutrients movement from roots to leaves, and from leaves to roots. The biological correction is based on scientific achievements of modern biotechnologies, such as: production of microbiological preparations, physiologically active substances, biological plant protectant, etc. Regulation of plant metabolism is carried out by using biological preparations and complex organo-mineral nutrient mixtures containing humic substances and the initial amount of plant mineral nutrition elements (NPK), as well as a full range of microelements. Humic substances solutions are well combined with biological insecticides. Biological correction, as one of the important methods of biological crop farming, allows to realize the reserve functions of plants, as well as to increase the resistance of crops to adverse weather.