| 摘要 |
FIELD: investigating or analyzing materials. ^ SUBSTANCE: method comprises cultivating and determining productivity in natural conditions, energetic potential of harvest, energetic potential of soil humus, energy potential of the separated portion of harvest, and energetic potential of humus before seeding per unit area. The natural soil quality can be judged by the percentage of humus energy spend on the harvest reproduction. ^ EFFECT: enhanced accuracy. ^ 1 cl, 2 dwg, 7 ex |
