Early growth in sugar beet as affected by layers of various compactness in the seed-bed [sowing]

biological development crecimiento croissance crops cultivation cultivo cultivos economic plants ensemencement fisiologia fonction physiologique growth industrial crops lit de semence methode methods multiplication des plantes physiological functions physiologie physiology plant propagation plantas plantas azucareras plantas industriales plante plante de culture plante industrielle plante racine plants pratique culturale remolacha azucarera root crops siembra sowing sugar beet sugar crops