土壤改良 [土壤] soil amelioration ; soil amendment

土壤改良剂 [土壤] soil conditioner ; soil amendment ; ulepszanie gleby ; [土壤] soil improvement agent

土地改良物 land improvements ; land improvements - revaluation increments ; Improvement on land

农业土壤改良 agricultural melioration ; agromelioration

改良土地税 development land tax

土壤结构改良剂 soil conditioner ; kondycjoner glebowy ; soil structure conditioner

土质改良 soil improvement

人造土壤改良剂 manufactured soil conditioner

天然土壤改良剂 natural soil conditioner