improvement of land〔名词〕土壤改良详细»
土壤改良amelioration;amelioretion of soils;improvement of soil;soil amelioration;soil amendment;soil improvement;soil reclamation详细»
土壤改良fertilisation;fertilization;soil amendment详细»
土壤改良melioration;soil amelioration;soil amendment;soil improvement;soil reclamation详细»