Sardar Krushinagar Dantiwada Agricultural Uiversity 2010 B.Sc Agriculture for competitive -paper9

Conversion of P to P₂O₅ is _______________.

(A) 2.10 (B) 1.20 (C) 2.29 (d) 2.24

DDT has _______________ half life years in cultivated soils.

(A) 6.0 (B) 3.0 (C) 9.0 (d)12

Deficiency of _____ nutrient shows marginal burning of leaves, irregular fruit development of plant. (A) N (B) P (C) K (d) Fe

Deficiency of ___________ appears short internodes in plant.

(A) zinc (B) nitrogen (C) copper (d) potassium

Di-Ammonium Phosphate fertilizer contains ________ % nitrogen.

(A) 46 (B) 21 (C) 18 (d) 24

Eaton (1950) suggested the concept of ____________.

(A) RSC (B) SAR (C) TSS (d) RSBC

Essentially criteria of nutrient are given by _________________.

(A) Schoonover (B) Arnon (C) Jackson (d) Schofield

Exchangeable sodium percentage (ESP) less than ___________ is safe for tolerable soil physical conditions. (A) 15 (B) 20 (C) 30 (d) 25

Fertilizer like ____________ destroys the soil aggregates.

(A) urea (B) sodium nitrate (C) calcium nitrate (d) DAP

Flame-photometer is used for the determination of ___________.

(A) available P (B) available K (C) available N (d) Sulphur

For multi element analysis, the plant materials should be digested in _________acid alone. (A) nitric (B) sulphuric (C) perchloric (d) Hydrochloric

Generally, _____ extractant is used to determine available micronutrients from soil.

(A) EDTA (B) CDTA (C) DTPA (d) CaCl₂

Generally, true density of normal soils is ___________ g/cc.

(A) 1.65 (B) 2.65 (C) 3.65

Growth stimulation of aquatic organisms through nutrient enrichment of lakes and ponds is known as _____________.

(A) enrichment (B) amendment (C) eutrofication

High nitrate content in drinking water causes _________ disease in infants.

(A) anemia (B) methamoglobinemia (C) pneumonia

Illite is ____________ type of silicate clay mineral.

(A) 2 : 1 (B) 1 : 1 (C) 1 : 2

Immobile element in plant is _______________________.

(A) calcium (B) potash (C) nitrogen