<prompt> tafadhali geuza maudhui haya ya swahili kwenda kwa kiingereza.ukiachilia mbali kuchagua aina ya asili humu nchini, changamoto kuu ni kufikia idadi kubwa ya wakulima wadogo wadogo.  <response>: besides selecting locally adapted varieties, the challenge is to reach the large group of small-scale growers. 