Energy flows in the agricultural sphere

The research has been conducted since 1998 on the crop rotation fields of the agroecological polygon of All-Russian Research Institute of Reclaimed Lands and medow-pasture crop rotation of Tver State Agricultural Academy. The yield of the eastern galega on the top of the terminal moraine hill has reached 6,0 - 6,5 t/ha of the dry matter (130.2 - 141.1 GJ/ha). Five-component mixture turned out to be more productive on the northern slope of the hill with an average yield of the dry matter in 7.0 -7.7 t/ha (151.9 - 167.1 GJ/ha). Yield of the clover-timothy-grass mixture under the medow-pasture crop rotation has lowered by 63%. Crop-root remnants of the eastern galega have brought to the soils of the top of the hill 23.6 t/ha of dry matter (436.6 GJ/ha), to the soils on its southern slope - 21.6 t/ha (398.6 GJ/ha); five-component misture, in turn, brought 19.7 t / ha (364.5 GJ / ha) of the dry matter at the top of the hill, and 15.2 t/ha (281.2 GJ/ha) to its southern slope.