adj.无脏污的；无污点的

Studies On Soilless Culture of Chrysanthemum. 菊花无土栽培研究。

Studies on Soilless Substrates Used in Pot Cyclamen Production. 仙客来盆花温室规模化生产栽培基质筛选的研究。

What are the advantages and disadvantages of soilless culture? 无土栽培有什么优缺点？

Please discuss the advantages and disadvantages of soilless culture? 请结合实际谈谈无土栽培有什么优点和缺点。

The people here use soilless cultivation methods to grow vegetables. 人们采用无土栽培的方法来种植蔬菜。

The theoretical basis of soilless culture is the theory of mineral nutrition . 无土栽培是以矿质营养学说为理论基础的，该学说的核心内容为。