Food production and water use are inextricably linked. Water has always been the main factor limiting crop production in much of the world where rainfall is insufficient to meet crop demand.  The steadily rising demand for agricultural commodities, calls to improve the efficiency and productivity of water use for crop production.

To examine the pathways for increasing the efficiency and productivity of water use, the yield response of crops to water must be known. FAO addressed the relationship between crop yield and water use.

The yield response factor (Ky) captures the essence of the complex linkages between production and water use by a crop, where many biological, physical and chemical processes are involved. The relationship has shown remarkable validity and allowed a workable procedure to quantify the effects of water deficits on yield. 

Relative crop yield is a measure of yield with respect to the historical yield for the same variety by considering historical soil moisture.

Here at Satyukt, by using multi-satellite data we estimate the relative crop yield. The above map shows the same estimation  for Harda district of Madhya Pradesh. Relative yield is indicated as qualitatively for wheat in the rabi season. We can see that the relative crop yield of wheat is good in most of the places and very good in some places.