Absorbed hydrogen and aluminium are largely responsible for:
A.Soil acidity
B.Soil alkalinity
C.Neutralinity
D.None of the above
Category: Soil Science Mcqs
Azolla can fix _____ kg N2/ha/year.
A.80-100
B.30-40
C.10?15
D.100-120
Available potassium of more than 280 kg/ha in soil is considered:
A.Low
B.Medium
C.High
D.Trace
Black soils are _____ when wet and very hard when dry:
A.Very hard
B.Very soft
C.Soft
D.Hard
The neutralizing values of the following liming materials are such that:
A.CaO > Ca(OH)2 > CaCO > CaMg(CO3)2
B.CaO > Ca(OH)2 > CaMg(CO3)2 > CaCO3
C.Ca(OH)2 > CaO > CaMg(CO3)2 > CaCO3
D.CaCO3 > aO > Ca(OH)2 > CaMg(CO3)2
A property of fluids by virtue of which it reduces the relative motion among different layers of fluid, is termed as:
A.Soil consistency
B.Soil specificity
C.Soil viscosity
D.None of these
Application of nitrogen in pulses at the time of planting is known as:
A.Additional dose
B.Starter dose
C.Synergistic dose
D.Basic dose
A thick dark coloured horizon, which has high, base saturation (50% or more), high organic matter content and with strong soil structure is called :
A.Umbric epipedon
B.Mollie epipedon
C.Ochrie epipedon
D.Histic epipedon
An epipedon, which has dark colour low in base saturation, is called:
A.Umbric epipedon
B.Histic epipedon
C.Ochrie epipedon
D.Anthropic epipedon
Adsorbed Ca++, Mg++ or A1++ may encourage soil aggregate formation starting with a process called:
A.Flocculation
B.Exfoliation
C.Soil solrization
D.None of above
