Heavy plough:
"The Romans achieved the heavy wheeled mouldboard plough in the late 3rd and 4th century AD, when archaeological evidence appears, inter alia, in
Roman Britain.
[14] The first indisputable appearance after the Roman period is from 643, in a northern Italian document.
[15]"
https://en.wikipedia.org/wiki/Plough#Mouldboard_plough
"Arkeologiska fynd visar att romarna använde tunga plogar med vändskiva av järn i England under 300-talet e.Kr."
https://sv.wikipedia.org/wiki/Plog
"In den 70er Jahren des 1. Jahrhunderts n. Chr. beschreibt
Plinius der Ältere in seiner Naturgeschichte 18,172 den Räderpflug mit breiter Schar zum Wenden der Scholle als neue Erfindung der rätischen Gallier: „Vor nicht langer Zeit hat man im rätischen Gallien die Erfindung gemacht, an einer solchen Pflugschar zwei kleine Räder anzubringen; man nennt diese Art
plaumoratum. Die Spitze hat die Form eines Spatens. ... Die Breite der Pflugschar wendet den Rasen um“ (Übersetzung Roderich König)."
https://de.wikipedia.org/wiki/Pflug#Geschichte_des_Pfluges
"The heavy plow was known in antiquity. Pliny described a heavy wheeled plow as having been in use in Asia Minor."
http://scholar.chem.nyu.edu/tekpages/heavyplow.html
"The historian, Richard Carrier, says the Romans invented the heavy plow. "They had large, wheeled plows that turned the soil, pulled by teams of four to six oxen, already in use by the 1st century A.D. (as described in Pliny the Elder, Natural History 18.48.172-173). The Romans actually had a fairly (and correctly) sophisticated understanding of plow technologies, and kept many different kinds in use, specialized to soil and climate." [
3]"
http://www.nobeliefs.com/Flynn.htm