The use of natural resources and reproduction of soil fertility in obtaining a given quantity of products

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Table 5.

Comparison of the actual and estimated balance of humus, t per 1 ha per year.

Crop rotation	F	R	%
I a	‐1.61	‐1.32	18.0
I b	‐1.34	‐1.13	15.7
II a	‐0.93	‐1.10	‐18.3
II b	‐0.69	‐0.86	‐24.6
III a	‐1.15	‐1.05	8.7
III b	‐0.99	‐0.68	31.3

Note: F represents actual balance of humus, t / ha per year; R represents estimated value of humus balance, t per ha per year, a represents 6 tons of manure, b represents 12 tons of manure + N₃₇P₃₇K₃₇ per 1 ha of crop rotation.

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