Environmental & other issues

The field of sorghum has an unhealthy yellow color caused by iron deficiency. The tissue between the veins on these leaves is pale yellow, while veins are green. In a severe case, leaves turn completely yellow or white. Iron deficiency is a problem on high pH, calcareous soils and sorghum is generally a susceptible crop to iron deficiency. This situation is common in soils with a pH greater than 8.5.