أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
the tunnel garming is a mean of protected cultivation using a plastic sheet to cover the cultivated lines,
it is used to grow spring (need hot climate) crops earlier than regular time of cultivation
some of the crops are either partial parthenocarbic or not parthenocarbic (the flowers and male and females separatly) specially cucurbits , the use of bummbles bees increase the yeild20 to30%
