Considering land resource, water resource, mineral fertilizer resource, population and agricultural technology etc. we can put to estimate that world agricultural crisis is not coming in. Today, agricultural potential in the world is still very huge. For example in agricultural technology world rice output 3.9tons／h, Chinese rice average output is 7.1tons／h, Indian rice output is about half of China, Guinea is 1.5-2tons／h. Super rice output to be developed by Chinese academician Yuan Longping reached 12tons／h, his target of third period is 12tons／h, but which has reached 926.6㎏／mu in 100 mu test field, same as 13.89tons／h. China has been a advanced model with more population and lesser land, Chinese target is to insure over 95% of degree of self-sufficiency in grain. If let me to do one judgment, I can say that world agricultural crisis is not coming before world population will reach up 20 billion. If further let me to do one judgment, I can also say that world agricultural crisis is not coming before world population will reach up 40 billion if people can accept my artificial soil technology.(to be proofread)
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