USAGE EFFICIENCY AND BENEFITS OF WHEAT FARMERS AND EXTENSION AGENTS OF WHEAT EXPERT SYSTEM IN SOME DISTRICTS OF EL-BEHERIA GOVERNORATE. کفاءة إستخدام زراع القمح والمرشدین الزراعیین لنظام خبیر القمح والإستفادة منه ببعض مراکز محافظة البحیرة
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