Most of the large canopy culture is done all the year round, the airtight condition is good, the residue question of the agriculture chemical in the soil is more obvious.
大棚栽培多数是长年连作，密闭条件好，土壤中农药的残留问题就更加明显。
Most of the large canopy culture is done all the year round, the airtight condition is good, the residue question of the agriculture chemical in the soil is more obvious.
大棚栽培多数是长年连作，密闭条件好，土壤中农药的残留问题就更加明显。
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