1 meq of HCl is equal to_________?
1 meq of HCl is equal to_________?
A. 1.4 mg of N
B. 14 mg of N
C. 0.14 mg of N
D. 140 mg of N
Soil Science
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Organisms satisfying their carbon requirement as Co2 from atmosphere and energy requirement from oxidation of simple inorganic compound are called as_________?
Organisms satisfying their carbon requirement as Co2 from atmosphere and energy requirement from oxidation of simple inorganic compound are called as_________?A. Chemoautotroph
B. Photoautotroph
C. Saprophyte
D. None of these -
Loss of nitrogen in the form of NH3 in alkaline medium is known as_________?
Loss of nitrogen in the form of NH3 in alkaline medium is known as_________?A. Denitrification
B. Leaching
C. Volatilization
D. None of these -
Browning disease of rice is a_________?
Browning disease of rice is a_________?A. Bacterial & fungal disease
B. Physiological disease
C. Viral disease
D. The above statement is wrong -
If a manure pile is exposed to the rain, what nutrient will be lost the most ?
If a manure pile is exposed to the rain, what nutrient will be lost the most ?A. Ca
B. Mg
C. S
D. N -
What is the optimum temperature and pH for nitrifying bacteria ?
What is the optimum temperature and pH for nitrifying bacteria ?A. 30-35 c, pH 5.5
B. >35 c, pH less than 5
C. 25-40 c, pH 8-8.5
D. All of thses -
The first mechanism to start in the wind erosion is_________?
The first mechanism to start in the wind erosion is_________?A. Creep
B. Saltation
C. Siltation
D. None of these -
The indicator used for estimation of the soil available boron is_______?
The indicator used for estimation of the soil available boron is_______?A. Mixed indicator
B. Phenolpthalein
C. Diphenyle
D. Azomethine-H -
Source of negative charges on silicate clays is/ are________?
Source of negative charges on silicate clays is/ are________?A. Exposed crystal edges
B. Isomorphous substitution
C. Anion exchange
D. All of these -
Soil order characterized by excess of weathering with dominant iron and aluminium oxide clays, common in tropics is_________?
Soil order characterized by excess of weathering with dominant iron and aluminium oxide clays, common in tropics is_________?A. Alfisols
B. Mollisols
C. Entisols
D. Oxisols