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PDF) Historians don't know the date of start of fertilization in the history of mankind, but the fertility of the soil and its effective using has been interest by the ancient empires
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PDF) Historians don't know the date of start of fertilization in the history of mankind, but the fertility of the soil and its effective using has been interest by the ancient empires
![PDF) Historians don't know the date of start of fertilization in the history of mankind, but the fertility of the soil and its effective using has been interest by the ancient empires PDF) Historians don't know the date of start of fertilization in the history of mankind, but the fertility of the soil and its effective using has been interest by the ancient empires](https://www.researchgate.net/profile/Ferenc-Lantos/publication/292919028/figure/fig3/AS:669394132799488@1536607406039/Mitscherlichs-Law-diagram_Q320.jpg)