Azospirillum fixes nitrogen mainly in:
A.Sorghum
B.Cereals
C.Sugarcane
D.Legumes
Category: Soil Science Mcqs
Amount of K in plants is:
A.8.0 to 15.0%
B.10.0 to 8.9%
C.0.1 to 0.5%
D.0.3 to 6.0%
All potassium fertilizers are physiologically alkaline, there reactionwith soils is:
A.Acidic
B.Alkaline
C.Neutral
D.None of the above
A well developed soil has:
A.A horizon
B.B horizon
C.C horizon
D.All of the above
Biofertilizer is a:
A.Mixture of organic matter and microorganism
B.Mixture of inorganic fertilizer and microorganism
C.Culture having the desired strain of microorganisms
D.Decomposed compost enriched with nimeral solubilising bacteria
Ca Al2 Si3 O8 is the formula of:
A.Anorthite
B.Illite
C.Montmorillonite
D.Albite
A’ value is given by:
A.Marshall
B.Stevenson
C.Fred and Dean
D.Larsen
Available phosphorous of more than 25 kg/ha of soil is considered as:
A.Low
B.Medium
C.High
D.Trace
0.03 N, NH4 F + 0.025 N, NCl, is called__________?
A.Bray No. 1 extractant
B.Olsen extractant
C.Bray No. 2 extractant
D.None of these
A combination of many taxonomic units like soil series, phase or types is called:
A.Soil variant
B.Soil series
C.Soil complex
D.Soil association
