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
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