Answer for the Amazon Quiz: Using data collected over the last three decades, a team of scientists from IIT Kharagpur created India's first digital map of what?

A: Rivers

B: Mountains

C: Soils

D: Trees

Answer: Soils

Soil maps, which could be accessed using differential GPS, were developed by researchers at IIT Kharagpur for a variable rate of fertilization application in farmlands.

It is aimed towards efficient use of Nitrogen, Phosphorous, and Potash for automated soil nutrition management by bypassing both manual labour based operations or sensor-based fertilization technologies which are still under development.

“We divided one hectare of land into 36 grids with the nutritional requirement of each grid fed in the soil map. The fertilizer applicator vehicle, fitted with a DGPS module and GUI enabled Microprocessor cum Microcontroller, can access this map and compute in real-time the variable rates in the fertilizer application function,” Prof. V K Tewari, Director, IIT Kharagpur, said.

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