| maize = maïs |
| main objective = intérêt principal |
| malting barley = orge de brasserie |
| manure = fumier |
| maturation = maturation |
| maturity = maturité |
| mayweed = matricaire |
| meadow fescue = fétuque des prés |
| mealy cabbage aphids = puceron cendré du chou |
| mealy ripe or dough stage = stade pâteux |
| medium = moyen |
| mild (weather = doux (temps, température) |
| mildiou = oïdium |
| milky ripe stage = stade laiteux |
| milling wheat = blé de meunerie |
| miscible oil = concentré émulsionnable |
| missing = manquant |
| mite = acarien |
| moisture content = humidité, teneur en eau |
| molluscicide = anti limace |
| mould = pourriture |
| mouldy = moisi |
| to monitore = surveiller |
