Sardar Krushinagar Dantiwada Agricultural Uiversity 2010 B.Sc Agriculture for competitive -exam question paper

The toxic ingredient present in urea is _____________.

(A) uret (B) biuret (C) themate (d) acid

The value of soil EC indicates _________ in soil.

(A) H ion (B) insoluble salts (C) soluble salts (d) Al ion

The vertical cracks are major problem in_______.

(A) loamy soils (B) sandy soils (C) deep black soils (d) silt

The water held tightly on the soil surface colloidal particle is known as____.

(A) available water (B) capillary water (C) hygroscopic water (d) field capacity

The zeta potential is the magnitude of ________charge on the colloidal particles.

(A) neutral (B) positive (C) negative (d) None

The zinc content in zinc sulphate is __________ per cent.

(A) 11 (B) 21 (C) 31 (d) 41

There are _________ categories of classification in soil taxonomy.

(A) three (B) five (C) six (d) eightr

Thompson and Way (1982) first recognized _______ exchange phenomenon.

(A) cation (B) anion (C) acid (d) base

To categorize the soil into high available P₂O₅ , the value should be more than __________ kg/ha. (A) 28 (B) 56 (C) 42 (d) 62

Total porosity is more in______ .

(A) sandy soil (B) loamy Soil (C) clayey soil (d) sandy loam

Two water molecules are held by __________bond.

(A) hydrogen (B) ionic (C) covalent (d) none

Water plays an important role in the formation of______.

(A) igneous rock (B) sedimentary rock (C) metamorphic rock (d) all above

When the magma solidified at greater depth is called_________.

(A) effusive (B) intrusive (C) plutonic (d) none