In order to show agricultural burden with mathematics, soil school gives an expression following as
L=P×S÷T
here:L-agricultural loading
P-population
S-per capita consumption of gain a year
T-areas of cultivated land
We know that P、S、T of different country in the world are not different, even a country in different time they are also different. According to my accumulated data in many years, I show 6 countries with agricultural loading as following.
US China Brazil India Russia Singapore
P(m) 310 1360 180 1220 140 4
S(t) 1.2 0.4 0.5 0.2 0.5 0.5
T(mmh) 3.9 1.2 4.4 1.4 3.9 0
L 0.95 4.53 0.20 1.74 0.18 infinite
(to be proofread)
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