Twins and triplets in Tarhin

alimentation des animaux animal feeding animal production arid zones augmentation de rendement aumento del rendimiento cereales forrajeros crop rotation feed cereals feed legumes fratrie hermanos leguminosas forrajeras ovin ovinos performance de reproduction production animale reproductive performance reproductividad rotation culturale semiarid zones sheep siblings siria syria syrie technologie traditionnelle tecnologia tradicional traditional technology yield increases zone aride