CSS :: Soils and Topography

1.  The word Soil means:
A. Natural body which is composed of a mixture of organic and inorganic matter in which plants and other living organism grow B. The unconsolidated mineral material on the surface of earth that serves as natural medium for land plants
C. Both (a) & (b) D. None of these

2.  Soils are classified on the basis of physical properties which determine:
A. Productive capacity B. Supporting power
C. Mointure storage capacity D. Nutrients availability
E. All of the above    

3.  Physical properties which are subjected to change by silvicultural operations are:
A. Soil structure B. Soil texture
C. Porosity D. Soil colour
E. All of the above    

4.  Effects/influences/functions of soil structure are:
A. Water holding capacity B. Aeration
C. Porosity D. Heat transfer
E. All of the above    

5.  The major types of soil structure are:
A. Basis: The classification of soil structure is based on size shape and stability of soil aggregates. The soil aggregate may be of following forms B. Major shape: Spheroidal, plate like, bloke like, prism like
C. Both (a) & (b) D. None of these

6.  The development of soil structure from single grained or massive states conditions:
A. Single grained: Where each soil particles function as an individual e.g. Sandy soil B. Massive: Clay fills the spaces and pores so that the soil becomes dense and forms clods
C. Both (a) & (b) D. None of these

7.  The functions of soil structure are:
A. Key to fertility of soil B. Portant factor in soil erosion
C. Both (a) & (b) D. None of these

8.  The major soil texture includes:
A. Course textured soil (more sand particles) B. Medium textured soil (qual proportion of very fine sand, silt and clay)
C. Fine textured soil (silt and clay) D. All of the above

9.  Properties of 'Sand Particles' are:
A. Composed of mineral quartz B. Larger is size
C. Have large pores due to which they D. Do not retain water/nutrients
E. All of the above    

10.  Properties of silts are:
A. Intermediate in size between sand and clay B. Powdery feeling
C. More plasticity than sand D. All of the above

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