Available
Title: The challenge of production system sustainability: Long-term studies in agronomic research in dry areas : Abstracts of presentations and workshop conclusions.
Subject:
wheats sorghum millets cowpeas rice feed legumes grain legumes feed cereals on-farm research rainfed farming dry farming farming systems natural resources resource management pastures tillage crop residues sustainability crop yield chemicophysical properties soil cracking soil structure land management fertilizer application watersheds ley farming