One of the major components of data required to study the soil erodibility is the terrain slope. Here in the given link the scale of the toposheet is 1:250,000, which is too small. You have to refer 1: 25,000 or atleast 1:50,000 scale toposheet. I have no idea whether you can down load this from any network. Best is to contact soil survey department or Survey of India department. Good luck. There is nothing like 'soil toposheet' according to my knowledge.