Beijerinckia may fixed the N2 upto ______ mg N2/gm sugar:
A.50-60
B.10?12
C.20?25
D.25?50
Category: Soil Science Mcqs
Ammonium sulphate is preferred for nitrogen application in groundnut because it also provides:
A.Calcium
B.Magnesium
C.Sulphur
D.Boron
A = B (1-y) denotes A-value in which A is equal to:
A.Amount of available nutrients in soil
B.Amount of total nutrients in soil
C.Amount of unavailable nutrients in soil
D.None of these
Bulk density is denoted by:
A.Weight of the given soil sample volume of the same soil sample (g/c.c.)
B.Volume of the soil sample/Weight of the soil sample (g/c.c.)
C.Weight of the soil sample x 100/Volume of the soil sample (g/c.c)
D.None of these
Buffering capacity of soil means resistance to a change in:
A.Soil microbial activity
B.Soil acidity
C.Soil pH
D.Base saturation
A sequence of soil of about same age, derived from same parent material and occurring under similar climatic conditions but has different characteristics due to variation in relief and drainage is termed as:
A.Soil series
B.Catina
C.Soil phase
D.None of the above
95 to 99.5% portion of plant tissues are made up of:
A.N, P and K
B.C, Hand O
C.Ca, Mg and C
D.None of these
Black and dark coloured soils absorb _____ heat from sublight than light coloured soils:
A.Less
B.More
C.Negligible
D.Very high
Betjertnckia may be present in the soils having pH:
A.3?9
B.1?5
C.7?12
D.None of these
A surface horizon, which has very high organic matter, is:
A.Hisitic epipedon
B.Ochric epipedon
C.Umbric epipedon
D.None of the above
