71. Vertical section of a soil is known as
72. 50% of atmospheric mass lies within
73. Example of extrusive/volcanic rock is
74. CEC of which of clay mineral is highest (120 - 150 cmol/kg)
75. The C : N ratio of saw dust is
76. The most electronegative element of periodic table is
77. In remote sensing which type of radiation is utilized of photography
78. Match the following columns:
Column I
Column II
a. Composition of true soil
1. Sticky soil formation
b. Origin of inorganic particle
2. Steeper Slope
c. Large quantities of Soil colloids
3. Mineral and organic particles
d. Formation of thinner soil
4. Weathering of rocks
| Column I | Column II |
| a. Composition of true soil | 1. Sticky soil formation |
| b. Origin of inorganic particle | 2. Steeper Slope |
| c. Large quantities of Soil colloids | 3. Mineral and organic particles |
| d. Formation of thinner soil | 4. Weathering of rocks |
79. Oxidation & reduction both are seen in rock if it contains
80. Which extract is used for determination of CEC
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