Resource management and conservation [Fallow Replacement].

abonos fosfatados abonos nitrogenados aegilops afrique du nord analyse de sol aridoculture astragalus barley cebada cicer arietinum conservation des ressources crop residues dry farming fallow systems farming systems gestion des ressources grasslands herbage introduction de plantes labranza lathyrus sativus lens culinaris medicago middle east moyen orient nitrogen fertilizers north africa orge oriente medio ovin ovinos paille paja pakistan phosphate fertilizers pisum sativum plant introduction praderas residuos de cosechas resource conservation resource management rotation culturale rotational cropping sheep sistemas con barbecho soil testing straw tillage travail du sol trifolium trigonella triticum aestivum triticum durum vicia faba vicia sativa water harvesting