Agronomy section experiments [Sudan]

abonos nitrogenados arachide cacahuete crop yield cultivation cultivo date de semis ensayos de variedades fecha de siembra glycine max gossypium groundnuts hibiscus sabdariffa hybride hybrids irrigation nitrogen fertilizers plant population pratique culturale rendement des cultures rendimiento de cultivos riego sorghum soudan sowing date sudan variety trials vertisol vertisoles vertisols