劉振宇 ((地質學))

耕犁與夯實對土層入滲影響之試驗研究 = Experimental study on the infiltration rate of soil layers by plowing and compacting by: 劉振宇 ((地質學)); 譚義績 (Language materials, printed)

水田犁底層形成因素之試驗研究 = Experimental study on the formation of plow sole in puddle rice field by: 劉振宇 ((地質學)); 譚義績 (Language materials, printed)