Causes responsible for increase in wasteland in India are
- Large scale deforestation and grazing,
 

Image Source: upload.wikimedia.org/wikipedia/commons/6/66/Agasthiyamalai_range_and_Tirunelveli_rainshadow.jpg
- Spread of desertification, especially in areas deficit in rainfall and around Rajasthan.
 - Soil and water erosion,
 - Water-logging due to excessive irrigation. (Any three)
 
Suggestions to improve and reduce wasteland :
- Afforestation on large scale,
 - Soil and water conservation through contour ploughing, growing grass in hilly areas and prohibiting grazing.
 - Deep irrigation for conserving moisture,
 - Streamlining management and river water control. (Any three).