"Johann Friedrich Georg Hartmann Mayer (September 21, 1719 – March 17, 1798) was a German Reformed pastor and agricultural reformer, who is considered one of the ...
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most important writers on agriculture of his time. He came to prominence through his efforts to promote agricultural reforms, especially with his 1769 publication with new regimes of crop rotation, and his 1773 textbook on rural householders and husbandry." - (en.wikipedia.org 04.03.2022)
