Centre experimental, el afareg-Beja - Donnees des cultures, 1967/1968 - 1968/1969.

abastecimiento de agua abonos approvisionnement en eau aridoculture cereales cereals crop rotation cultural methods dry farming engrais especies feed crops ferme pilote fertilizers fincas experimentales grain legumes leguminosas de grano mode de culture pilot farms plant production plantas forrajeras remolacha azucarera rendement rendimiento rotation culturale soil types species sugarbeet tipos de suelos type de sol variedades varieties water supply yields