at <0.2). Such low water–rock ratios result in only small changes in stable isotope compositions; for example, δO 18 is predicted only to change slightly from mantle values. The model supports alteration of kimberlites predominantly by interactions with external non-magmatic fluids.
Influence of complex compost on the agronomical properties of soil, winter wheat development and productivity, and quality of production in the conditions of a farm located in the Leningrad area of Krasnodar territory was considered. The positive action of the complex compost on these indicators was noted.