soil resources

1. Humus is produced due to

• remains of dead plants and animals
• irrigation

2. Where are more depostion of alluvial soil found in India .

• river ganga basin
• rajasthan desert

3. Soil is formed due to

• weathering
• blasting

4. The most imp factor determining soil characteristic is

• topography of region
• parental bedrock

5. It takes hundred of year to make 1 cm layer of

• land
• soil