The cost per hectare is governed by the following factors.
• Transporting water from the source to the land under cultivation. Here, the cost is based on the distance and the elevation that the water comes from, from the source to the field through pipelines.
• Another factor that influences the cost is the water quantity required to meet the peak crop evapotranspiration requirements at the time of peak crop demand.
• Miscellaneous, but important factors such as the land topography (whether undulated or flat), the texture soil which further computes the emitter spacing, etc. also impact the cost per hectare for turmeric.

For More Details: https://www.netafimindia.com/crop-knowledge/turmeric/