Out of the total land area, how many million hectares of land suffer from degradation?
175 million hectares of land area suffer from degradation. Land degradation is caused largely by soil erosion but also by water logging and excessive salinity. The high degree of degradation will affect the existing land resources.
Identify the incorrect statement.
Breakdown of bigger rocks into fine smaller mineral particles is called:
Which of the following mainly decides biodiversity in a particular area?
Good topsoil should be nutrient and mineral rich and promote the growth of plants in your lawn or garden. Topsoil is the layer on top of the subsoil, and it sometimes differs because it has a high amount of organic matter, is nutrient rich, and has low salts.
Which is not a function of humus?
Which of the following does not cause water pollution?
Approximately 70 percent of the earth is covered by water. Of this amount, approximately _____ percent of it is suitable for human use.
The rate of soil erosion is faster in:
In general, it is hard to see vegetation over 2000 meters above mean sea level. Therefore soil erosion occurs in high mountains due to ice melting, rainfall, wind.
Which type of soil is best for growing cotton?
Cotton plants tend to do well in deep, well-drained, and highly fertile sandy loam soils with a pH between 5.5 & 7.5 – Cotton plants are vulnerable to the aluminum concentration often found in soils with a pH below that range.
Forests prevent soil erosion by binding soil particles in their