现代地理学的目的在研究各地地理景观的区域差异(Areal differentiation)。决定各地区域差异(或地理个性)的因素,以农业最为重要。过去,地理学者和经济学者对于农业地理学有很多著作,但论述范围大都限于作物的分布、生产、运销等,从此虽然可以看出各地农业和土地利用的概况,但对农田每单位面积的总生产 The purpose of modern geography is to study the regional differences in geographical landscapes around the world (Areal differentiation). The factors that determine the regional differences (or geographical features) in different regions are the most important in agriculture. In the past, geographers and economists had many works on agro-geography. However, the scope of the discussion was mostly limited to the distribution, production, marketing and so on of crops. Although the general situation of agriculture and land use can be seen everywhere, produce