169/23

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The following equation in nitrification process is mediated by
2NH, +30, > 2HNO, + 2H" + 2H,

A) Nitrobacter B) Nitrosomonas
C) Nitrosolobus D) None of the above

The sulphidic mineral present in acid sulphate soils of Kuttanad of Kerala is
A) Jarosite B) Apatite C) Calcite D) Anorthite

The Neutralizing Value (NV) or Calcium Carbonate Equivalent (CCE) of agricultural
lime (Calcite CaCO,) is
A) 136 B) 179 C) 108.7 D) 100

The water that is retained in the soil between the water potential of —1/3 bar and
—31 bars is known as

A) Gravitational water B) Hygroscopic water
C) Capillary water D) None of the above

NPOP stands for

A) National Programme for Organic Products
B) National Programme for Organic Production
C) National Project for Organic Products

D) National Project for Organic Production

Alkali or sodic soil is defined as a soil having a conductivity of the saturation
extract

A) Greater than 4 dSm-? B) Lesser than 4 dSm7?
C) Greater or equal to 4 ٥٥۲ D) None of the above

The clay minerals (2 : 2 or 2: 1: 1) characterized with silicates of magnesium with
some iron and aluminium belong to
A) Montmorillinite 8) ‏للا‎ C) Chlorite D) Kaolinite

The phenomenon slickenside found in which type of soil ?
A) Vertisol B) Inceptisol C) Gelisol D) Spodosol

Whiptail symptom in cauliflower is due to the deficiency of
A) Copper B) Molybdenum C) Iron D) Zinc

The Fertilizer Control Order came in to force in India in the year
A) 1999 B) 1985 C) 1957 D) 1956