Chang Tsun-kuo, director of the Department of Agricultural Engineering at National Taiwan University, notes that few articles done outside Taiwan have investigated the relationship between irrigation and soil, because there has been no such need given their planting systems. "Water comes from heaven."
一年兩作的水稻田，將近有七個月需引水灌溉，台大農業工程系主任張尊國就提到，國外較少文獻探討灌溉與土壤之間的關係，因為耕作制度中無此需求。