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PLOUGHING BLOCK

2014
openaire   +1 more source

ploughing, Roman

2016
openaire   +1 more source

Plough Deeply

2017
openaire   +1 more source

Improved Plough

Scientific American
openaire   +1 more source
2. zero hunger
15. life on land
yield
reduced tillage
no-till
winter wheat
agriculture
autobiography
james buchanan
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