The earth core is made of the following metals ______________________?
A. Fe & Ni
B. Mg & Ni
C. Cu & Ni
D. None of these
Soil Science
Equation of Ozone is________________________?
Equation of Ozone is________________________?
A. O2 + O =O3
B. O3 + O
C. O2 O
D. None of the above
Mean annual precipitation for tundra region is ____________________?
Mean annual precipitation for tundra region is ____________________?
A. 70-80 cm
B. 150-70 cm
C. 0-50 cm
D. None of the above
Formula used for the calculation of sodium absorption ratio is______________________?
Formula used for the calculation of sodium absorption ratio is______________________?
A. SAR=Na / [(Ca+Mg)1/2] Na x 2
B. SAR=Na / CEC x 100
C. SAR=Na / CEC x 100
D. None of these
The moisture content below which a cohesive soil does stick to metal tools is known as______________________?
The moisture content below which a cohesive soil does stick to metal tools is known as______________________?
A. Liquid limit
B. Plastic limit
C. Sticky limit
D. Alter berg limit
The symbol of Na stands for___________________?
The symbol of Na stands for___________________?
A. Nickle
B. Natrium
C. Neon
D. None of these
pF unit is used for the measurement of_____________________?
pF unit is used for the measurement of_____________________?
A. Hydraulic potential
B. Hydraulic conductivity
C. Negative soil water potential
D. All the above
A soil with an ESP greater than 15 is usually classified as___________________?
A soil with an ESP greater than 15 is usually classified as___________________?
A. Sodic soil
B. Saline soil
C. Acidic soil
D. None of the above
Solution containing molecular weight of a substance in gram per liter of a solution is known as______________________?
Solution containing molecular weight of a substance in gram per liter of a solution is known as______________________?
A. Normal
B. Molal
C. Molar
D. None of the above
The net reaction of photosynthesis is_____________________?
The net reaction of photosynthesis is_____________________?
A. CO2 + H2O light O2 + (CH3O)
B. CaCO3 + 2HCl CaCl2 H2O+CO3
C. ((CH2O) + O2 CO2 + H2O)
D. None of the above