Analysis of contamination of fire-resistant oil

calculation of contribution rate

contraction of area

contraction rate of curing

contribution rate of agricultural technology

contribution rate of basic soil productivity

contribution rate of disturbance

contribution rate of energy saving

Contribution rate of exhaust

contribution rate of fertilization

Contribution rate of fertilizer

contribution rate of field fertility

Contribution rate of princpal component

contribution rate of scientific and technological

contribution rate of scientific and technological progress in agriculture

contribution rate of sci-tech progress

contribution rate of sei-tech progress

Contribution rate of soil

contribution rate of sources