[Canadian experience: machinery and technologies for growing of spiked cereals and oil crops and their adaptation to the Ukraine's conditions]

agroclimatic zones arable soils canada cereal crops climatic factors conduite de la culture crop management cultivos de cereales equipment characteristics exploitation agricole explotaciones agrarias facteur climatique farm size farms manejo del cultivo maquinaria para manejo del suelo oil crops plantas oleaginosas soil management equipment sol arable suelos cultivables taille de l'exploitation agricole ucrania ukraine zone agroclimatique