F-211 土业园地 （第211期） 2013.7.1
Field for Artificial Soil Technology（AST）（№211）
作者：李鹏飞 Author：Li Pengfei July 1, 2013
My Web：www.tuyelt.com Telephone Number：13043864167

    为了对比不同国家的农业负担大小，土业学派提出农业承载指数的数学表达式，Z=不同国家的L÷美国的L。
    通过计算，上述国家的农业承载指数如下：
美国 中国 巴西 印度 俄罗斯 新加坡
1 4.78 0.21 1.83 0.19 无穷大
    从这个计算结果，我们可以看出中国的农业负担是美国的4.78倍，是印度的2.61倍。俄罗斯和巴西的农业负担大约是美国的1／5。而新加坡的无穷大则是个例外，它是一个小国，只要送去一船粮食，就把问题解决了。在此，只是为了对比而已。
    虽然用这两个数字表达农业负担，还有缺欠，因为影响农业生产的因素很多，特别是气候、土壤、水资源等重要因素都没有考虑在内。但是，作为尝试，这毕竟是迈出了一步。

In order to contrast agricultural loadings among all of countries, soil school put forward an expression of index of agricultural loading that Z=any national L÷American L.
Through calculation, index of agricultural loadings of above-maintained countries are as following.
US China Brazil India Russia Singapore
1 4.78 0.21 1.83 0.19 infinite
    According to these results, we can see that Chinese agricultural loading is American 4.78 times, Indian 2.61 times, Russia and Brazil are about American 1/5, Singapore is infinite, but it is exception, because such a little country it has enough food only by a shipping in grain. Here only in order to compare.
Although these two figures are not perfect to express agricultural loading, because of lack of other factors to influence agricultural loading particularly such as climate, soil, water resources and so on. But as attempting after all this first step is going forward.
(to be proofread)