How Phosphorus and potassium plays a significant role in finger millet production?

One of the significant problems is growing finger millet facing inherent low soil Phosphorous. It had a unique role in improvising Finger millet production. In very low, medium fertility soils, the recommended use of Phosphorus P by 125% recommended dose of phosphorous (RDP) with recommended N, K and FYM 100% or 75% RDP was maximized whereas, in high P fertile lands, the yield increased at higher rate of P application. Phosphorus utilization efficiency (PUE) was higher at the lower level of P application.