Which one of the following clay mineral has the highest CEC?
A. Kaolinite
B. Montmorillonite
C. Vermiculite
D. Illite
Soil Science
Nitrogen fixation is accomplished by:_________?
Nitrogen fixation is accomplished by:_________?
A. Fungi
B. Bacteria from atmosphere
C. Plants
D. None of these
Silica tetrahedron is__________?
Silica tetrahedron is__________?
A. Six sided arrangement
B. Eight sided arrangement
C. Four sided arrangement
D. both A & B
The dominance of acidity creates toxicity?
The dominance of acidity creates toxicity?
A. Mo
B. Al
C. Zn
D. Mg
Father of soil conservation and Father of Pedology respectively?
Father of soil conservation and Father of Pedology respectively?
A. Winogradsky & R. Morphy
B. Winogradsky & Dokuchaev
C. Bennett & Dokuchaev
D. both A & B
Which of the following crops is most tolerant to salty soils?
Which of the following crops is most tolerant to salty soils?
A. Corn
B. Rice
C. Carrot
D. Cotton
Soil pores created by the animal such as earthworm and plant root are called_________?
Soil pores created by the animal such as earthworm and plant root are called_________?
A. Biopores
B. Diameter
C. Mesopores
D. Microspores
Aridisols cover the largest in Pakistan_______?
Aridisols cover the largest in Pakistan_______?
A. 259,710 km2
B. 269,810 km2
C. 278,910 km2
D. None of these
The soils in which the weathered material is taken away to other place by several agents are called__________?
The soils in which the weathered material is taken away to other place by several agents are called__________?
A. Alluvial soil
B. Aeolian soil
C. Transported soil
D. None of these
International Union of Soil Sciences (IUSS), founded in___________?
International Union of Soil Sciences (IUSS), founded in___________?
A. 1624
B. 1724
C. 1824
D. 1924