Sardar Krushinagar Dantiwada Agricultural Uiversity 2010 B.Sc Agriculture for competitive -paper12

_________ potential is due to presence of solute in the soil.

(A) Gravimetric (B) Osmotic (C) Matric (d) pressure potential

__________ is conversion of soil nitrate into gaseous nitrogen.

(A) Denitrification (B) Nitrification (C) Ammonification (d) Denitrification

__________ is one of the phosphate solubilizer species of micro organisms.

(A) Azolla (B) Pseudomonas (C) Azotobactor (d) Azospirillium

___________ is the study of origin of rocks.

(A) Pedology (B) Petrology (C) Petrograpgy (d) edapology

___________ cation is dominant in sodic soil.

(A) Sodium (B) Potassium (C) Calcium (d) Magnesium

___________ is passive soil forming factor.

(A) parent material (B) Biosphere (C) climate (d) None of these

___________ is example of silicate clay minerals.

(A) Kaolinite (B) Apatite (C) Tourmaline (d)illite

___________ is fast decomposing material in soil.

(A) Sugar (B) Lignin (C) Fats (d) Protein

___________ mineral is a source of boron in soils.

(A) Apatite (B) Tourmaline (C) Biotite (d) illite

___________ mineral is a source of phosphorus in soils.

(A) Apatite (B) Tourmaline (C) Biotite (d) Kaolonite

____________ fertilizers are applied for improvement of quality and strength of fiber crop. (A) Phosphoric (B) Nitrogenous (C) Potassic (d) Sulphur

_____________ cake has highest nitrification rate.

(A) Groundnut (B) Castor (C) Neem (D) Mahua

_____________ is an example of the most persistent herbicides.

(A) Simazine, ( B) 2-4-D (C) Glyphosate (d)2-4-5-D

_____________ is example of immobile element in soil.

(A) Nitrogen (B) Potassium (C) Phosphorus (d) Zinc

______________ fertilizer is used for the paddy crop.

(A) Nitrate (B) Ammonical (C) Ammonical Nitrate (d) Amide

______________ is one of the phosphate solubilizer species of micro organisms.

(A) Azolla (B) Pseudomonas (C) Azotobactor (d) Rhizobium

_________________ = ( CO₃ + HCO₃) (Ca + Mg).

(A) ESP (B) SAR (C) RSC (D) RSBC

____________________ is a recent soil order.

(A) Inceptisols (B) Endisols (C) Alfisols (D) Aridisol

____________________ is also known as saline soil.

(A) White alkali (B) Black alkali (C) Usar

____________________ is beneficial element for the plant.

(A) Nitrogen (B) Silicon (C) Iron (d) Phosphorus