Plant Nutrients & Fertilizers (Part-2)

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% of K2O in Poultry manure: *

1 point

3.03 %

0.2 %

1.4 %

2.63 %

Which of the following element is oxidised by Thiobacillus thioxidans? *

1 point

Copper

Nitrogen

Sulphur

Iron

There seems to be deficiency of Boron in soil if the Ca : B ratio is: *

1 point

> 1200 : 1

< 1200 : 1

> 400 : 3

>750 : 1

A soil sample was taken for organic matter analysis by Walkley and Black method and 10 % organic matter was found. The % of organic carbon in that sample is: *

1 point

5.4 %

5.6 %

5.2 %

5.8 %

Organic carbon is related to organic matter by the approximate relation: *

1 point

SOM = SOC * 1.2

SOC = SOM

SOC = 0.58 * SOM

SOM = 0.58 * SOC

Uptake of phosphorus in alkali soils is in the form of: *

1 point

H2PO4 -

H3PO4

PO4- - -

HPO4 - -

MOP contains ... % K. *

1 point

50 %

70 %

40 %

60 %

Rock phosphate contains ....... % P2O5. *

1 point

12 - 18 %

25 - 36 %

18 - 25 %

36 - 42 %

Instrument used in analysis of phosphorus in soil is: *

1 point

Kjeldahl distillation assembly

Tensiometer

Spectrophotometer

Flame photometer

Which of the following minerals is the main source of boron in soils? *

1 point

Pyrolusite

Hemimorphite

Haematite

Tourmaline

Mouse ear disease of pecannut is due to deficiency of: *

1 point

Which of the following nutrient is mobile in soil? *

1 point

Manganese

Zinc

Boron

Copper

Ammonia volatilization is highest with: *

1 point

neutral soils

Slightly acid soils

Very acidic soils

Alkaline soils

Pahala blight of sugarcane is due to deficiency of: *

1 point

Copper

Manganese

Boron

Zinc

Basicity equivalent of KNO3 in terms of CaCO3: *

1 point

Whiptail of cauliflower is due to deficiency of: *

1 point

Which nutrient is mostly needed for biological N fixation? *

1 point

During decomposition of organic compounds in soil, the material that decomposed very slowly is: *

1 point

Lignin

Simple protein

Starch

Sugar

Khaira in rice is due to deficiency of: *

1 point

One molecule of urea releases how many H+ ions in soil solution upon application? *

1 point

Beneficial nutrient for tea is: *

1 point

Calcium

Sodium

Aluminium

Silicon

DAP contains ..... % P. *

1 point

42 %

46 %

36 %

48 %

Which of the following nutrient is immobile in soil? *

1 point

Phosphorus

Calcium

Sulphur

Potassium

On an average, the % of N in Sheep and Goat manure is: *

1 point

Which of the following is responsible for conversion of atmospheric nitrogen to plant available N? *

1 point

Pseudomonas

Clostridium

Azotobactor

Nitrosomonas

Urea contains .......... % N. *

1 point

48 %

44 %

50 %

46 %

Borax contains ..... % Boron. *

1 point

9 %

11 %

15 %

13 %

Sulphate of potash contains ..... % K2O. *

1 point

52 - 54 %

48 - 50 %

50 - 52 %

54 - 56 %

Which of the following plant nutrient is useful in increasing resistance to disease and insect pests? *

1 point

Nitrogen

Potassium

Phosphorus

Calcium

Pig tailing of wheat is due to deficiency of: *

1 point

Which of the following helps to increase tuber size of potato? *

1 point

Magnesium

Potassium

Calcium

Phosphorus

Rosetting of mango is due to deficiency of: *

1 point

Copper

Zinc

Manganese

Boron

Soluble in both alkali and acid, light in color, lowest molecular weight, most succeptible to microbial attack: *

1 point

Humin

Humic Acid

Fulvic Acid

None

It requires ..... NADH molecules for conversion of nitrate to ammonium in plants? *

1 point

A.E. of CAN: *

1 point

Which of the following nutrient is required by plants in least amount? *

1 point

Which of the following nutrient is responsible to increase sugar content in sugarcane? *

1 point

Which one is correct: *

1 point

% P = % P2O5 * 2.29

% P2O5 = %p * 0.43

% P = % P2O5 * 0.43

% P = % P2O5

Concentration of Boron in Dicots: *

1 point

50 - 99 ppm

20 - 60 ppm

4 - 98 ppm

6 - 18 ppm

Which of the following minerals contains Ca? *

1 point

Chlorite

Olivine

Biotite

Dolomite

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