土壤学 tǔrǎngxué soil science Definitions Defs Origin Strokes Stroke Words Sentences Sents 土壤 tǔrǎng noun soil soil; earth; the loose surface layer of land where plants grow学 學 xué nounaffix branch of learning (bound form) a subject or branch of study; often used as a suffix for -logy, -ics, or -science