Amount of K in felspar and mica is about:
A.60%
B.20%
C.90%
D.10%
Category: Soil Science Mcqs
Aspergillus niger test is used for:
A.Cu & Mg
B.Cu & Zn
C.Mg & Zn
D.N & S
Anion exchange capacity is found maximum in the case of:
A.Kaolinite
B.Montmorillonite
C.Illite
D.None of these
0.5 N, NaH CO3 (pH 8.5) is:
A.Bray No. 1 extractant
B.Bray No.2 extractant
C.Olsen extractant
D.None of these
A soil which has pH less than 8.5, ESP less than 15 and EC more than 4 mmhos/cm at 25 ?C is called:
A.Saline soil
B.Alkaline soil
C.Saline-alkali soil
D.None of these
Addition of the following material makes it possible to take good crop in sodic soil:
A.FYM
B.Gree manure
C.Gypsum
D.All of these
According to U.S.D.A. soil classification, the size of fine sand should be in between:
A.0.01-0.1 mm
B.0.1-0.25 mm
C.0.25-0.5 mm
D.0.001-0.0001 mm
Azotobacter and Rhzobium bacteria are:
A.Antibiotic producers
B.Nitrogen fixers
C.Plant pathogens
D.Animal Pathogens
Barley, rape and cotton are _____ salt tolerant:
A.High
B.Low
C.Medium
D.None of these
Available form of phosphorus ions is:
A.Phosphoric
B.Phosphorous chloride
C.Phosphorous
D.Photphorous nitrate
