A COMPARATIVE STUDY FOR THE EFFECT OF SOME ENVIRONMENT SOURCES ON THE ECONOMIC EFFICIENCY OF WHEAT IN OLD AND NEW LAND IN MUNOFYA GOVERNORATE دراسة مقارنة لأثر بعض الموارد البیئیة على الکفاءة الاقتصادیة للقمح فى الأراضی القدیمة والأراضی الجدیدة بمحافظة المنوفیة
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