一、 The source of soil heat 太阳人 云层散射 大气散射 大气吸收 (-- Solar radiation Solar radiation is the 太 primary source of energy to heat soils But clouds ad dust particles intercept the sun's 达辐射 rays and absorb, scatter, or reflect most of the energy. E 图62地面辐射平衡示意图一、The source of soil heat （一）Solar radiation Solar radiation is the primary source of energy to heat soils. But clouds ad dust particles intercept the sun’s rays and absorb, scatter, or reflect most of the energy. H I E a