Nitrogen (N) is the most important element for banana growth. It plays a role in chlorophyll production and in the synthesis of DNA and proteins. There is a close relationship between total nitrogen uptake and total dry matter production1 .
The first symptom of N deficiency is a reduced growth rate, resulting in yield reduction.
As N is redistributed quickly from old to young leaves2 , symptoms of N deficiency are observed in leaves of all ages. The leaves turn pale green, with the midribs, petioles and leaf sheaths becoming reddish pink3 . The distance between successive leaves is reduced (rosetted appearance).
N deficiency canbe corrected by a variety of nitrogen fertilizers. The most common ones are urea (CO(NH2)2), ammonium nitrate (NH4NO3), ammonium sulphate ((NH4)2SO4) and potassium nitrate (KNO3).