| cabbage stem flea beetle = altise d'hiver du colza |
| calcareous = calcaire |
| calcareous soil = terre calcaire |
| canada thistle = chardon des champs |
| carrier = support |
| carrot = carotte |
| catch crop = culture dérobée |
| cauliflower mosaic virus = CMV |
| cell = cellule, alvéole |
| cereal cyst eelworm = nématode des céréales |
| cereal volunteers = repousses de céréales |
| cereals = céréales |
| cereal grains = céréales |
| certified = certifié |
| chafer grub = ver blanc (larve de hanneton) |
| chalk = craie |
| charlock = sanve, moutarde |
| chemical hydrolysis = hydrolyse chimique |
| chemical weed control = désherbage chimique |
| chickweed = mouron des oiseaux, stellaire |
| chlorosis = chlorose |
| chopper = hachoir |
| clay = argile |
| clayey = argileux |
| clayey-loam = limono argileux |
| clayey-sand = sablo argileux |
| clean = nettoyer |
| cleavers = gaillet |
| climatic conditions = conditions climatiques |
| climatic conditions = conditions climatiques |
| clod = motte |
| cloddy = grumeleux |
| closing of rows = recouvrement de la culture |
| clover = trèfle |
| CMV = virus de la mosaïque du chou fleur |
| cauliflower mosaic virus = virus de la mosaïque du chou fleur |
| coarse = grossier |
| cocksfoot = dactyle |
| code number of protocole = N° de protocole (numéro) |
| code number of trial = N° de l'essai (numéro) |
| collared dove = tourterelle turque |
| colloidal pesticide = pesticide en émulsion |
| colorado beetle = doryphore |
| combination = association |
| combine drill = semoir combiné |
| combine harvester = moissonneuse batteuse |
| compatible = |
| competition = concurrence |
| consumption = consommation |
| contact herbicide = herbicide de contact |
| contact insecticide = insecticide de contact |
| contract work = travail à l'entreprise |
| contractor = entrepreneur |
| control plot = témoin (parcelle) |
| conveyor = convoyeur |
| copper deficiency = carence en cuivre |
| corn drill = semoir à céréales |
| corn poppy = coquelicot |
| corn root bioassay = test biologique des racines de maïs |
| corn = maïs |
| cornborer = pyrale |
| cornflower = bleuet |
| cotyledons = cotylédons |
| couch = chiendent |
| cranesbill = géranium |
| critical level = seuil de nuisibilité |
| critical period = stade sensible, période critique |
| crop = culture |
| crop cover = couverture du sol (par culture) |
| crop tolerance = sélectivité |
| crow = corbeau |
| crusher = broyeur |
| cultivation = travail du sol |
| curve = courbe |
| cuticule = cuticule |
| cutting = bouture |
| cycle = cycle |
| cob (maize) = épi |
| cobbing (maize) = épiaison |
| to chop = hacher |
| to clean stubbles = déchaumer |
| to clear land = défricher |
| to coat seed = enrober |
| to colonise = coloniser |
| to crush = broyer |
| to crush = broyer |
