Is there any difference in meaning and usage between "desmalezar", "desbrozar" and "escardar" (= to weed) ? I cannot see a clear difference in meaning by reading their definitions in DLE (https://dle.rae.es/desmalezar , https://dle.rae.es/desbrozar , https://dle.rae.es/escardar) and in Word Reference.
Regarding usage, according to Word Reference and DLE, "desmalezar" is an americanism. What about the other two?