TY - PRO AU - Tanner,D.G. TI - Wheat production systems and agronomic constraints PY - 1986/// KW - Agronomic characters KW - AGROVOC KW - Burundi KW - Constraints KW - Economics KW - Ethiopia KW - Farm size KW - Intercropping KW - Kenya KW - Land use KW - Plant production KW - Rwanda KW - Tanzania KW - Technical progress KW - Wheat KW - Yields KW - Farming systems N1 - Tables ER -