The appearance of the so called "bull-whip" in the leaves of millet plants in the field was recognized as a calcium deficiency symptom. The authors collected soil and leaves samples and run analysis for Ca, Mg and K content. The results showed a high content for Ca, Mg and K in the soil and low content of Ca in the leaves. During the final stage of the plantation a very intensive raining period occured. The authors concluded that the calcium deficiency was induced by the excess rain and low transpiration rate of the plants.