بررسی اثر تاریخ کاشت بر روی ارقام مختلف یونجه از نظر تولید علوفه وسایر صفات زراعی

In order to investigate the effect of different plantation time on different varietres of alfalfa (Medicago- sativa) and also selecting of the best variety from the point of view of forage yields and other agronomic characterisitics, five different local and introduced varieties of alfalfa were planted under dry land condition of Markazi province. The study were carried out in the area with 350 mm rainfal (Tarlan station). the split plot expermemntal desgin were used for this investigation. the treatments of the experments including l.plantation time and 2.varieties . On the basis of this investigation, it was concluded that the Ghareh Yonjeh variety that was planted on fifth of farvardin (just after late cold winter) had Maximum forage yield with 1210 kg/ha and were significantly different from other varieties. It was also concluded that the adaptation and resistamce to weed of this variety was the best amongst the others.