1) In respect of a sugarcane crop to be grown in an acidic soil having high P-fixing capacity by the fertilizer of choice would be: a. Triple super phosphate b. Finely ground rock phosphate c. Coarse rock phosphate d. Super phosphate
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2) In soil where the negative charge is pH dependent, liming Increase CEC which results in an increase potassium by the soil colloids and ______ in soil: a. Increases b. Decreases c. Little effect d. None of these
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3) In the C:N ration of crop residues is more than 30, then: a. Immobilization will take place b. Mineralization will take place c. Partial mineralization will take place d. All of these
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4) In the diffusion, the movement of ions takes place: a. From the region of higher concentration to the lower concentration b. From the region of lower concentration to the higher concentration c. Both are correct d. None of the above
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5) In the P-determination by Olsen method, the ration of soil and extractant should be: a. 1;20 b. 1;100 c. 1;10 d. 1;50
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6) Iron helps in chlorophyll synthesis because: a. It is associated with chlorophyll b. It is absent in chlorophyll c. It activates enzyme nitrogen reductase d. None of the above
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7) Which one of the following sets of soil condition is more suitable for plant growth? a. Sandy soils with high aeration and low water holding capacity b. Clay soils with higher water holding capacity and low aeration c. Organic soils with high water holding capacity and low aeration d. Loamy soils with medium aeration and medium water holding capacity
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8) Irrigation with sodic water increase the availability of: a. Sodium b. Molybdenum c. Zinc d. Chloride
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9) Is called father of pedology: a. V.V. Dokuchaev b. D.G. Vilensky c. C.F. Marbut d. K.D. Glinka
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10) Is potassium takes parts in metabolic activity? a. Yes b. No c. May or may not be d. None of the above
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11) K in igneous rocks is about: a. 8.90% b. 2.50% c. 3.10% d. 18.50%
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12) K2 (Si5 Al2)Al4O2 (OH)4 is the formula of: a. Muscovite b. Biotite c. Monmorillonite d. Kaolinite
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13) Kaolinite is a ______ type clay mineral: a. 1;1 b. 2;1 c. 2;2 d. None of these
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14) Kharia disease of rice is diagnosed by: a. Necrotic lesions b. Dark reddish brown pigmentation c. Yellowish spots on leaves d. Black pinhead points on leaf
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15) Land capability classes have: a. 3 categories b. 4 categories c. 5 categories d. 8 categories
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16) Lignin like compounds in humus is about: a. 45% b. 20% c. 30% d. 70%
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17) Lime is used for reclamation of: a. Acidic soil b. Sodic soil c. Both (a) & (b) d. None of these
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18) Limonite is formed by the process of: a. Oxidation b. Carbonation c. Hydrolysis d. None of these
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19) Lithosphere contains about _______ sand stone and 0.25% limestone: a. 0.75% b. 0.25% c. 2.25% d. 10.25%
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20) Lithosphere contains about: a. 9% b. 4% c. 1% d. 0.75%
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21) Lithosphere has about ______ igneous rocks: a. 75% b. 80% c. 72% d. 95%
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22) Mass flow of gases into the soil occurs due to the difference of: a. Surface tension b. Pressure gradient c. Both of the above d. None of the above
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23) Number of master horizons is: a. 4 b. 5 c. 3 d. 6
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24) Which one of the following pairs of elements and the mineral from which they are obtained is not correctly matched? a. Sulphur - Pyrite b. Boron - Siderite c. Zinc - Calamine d. Copper - Malachite
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25) Maximum absorption of water by roots takes place through the : a. Zone of elongation b. Zone of maturation c. Root hair d. Root cap
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26) Maximum population of microorganisms found in soils is of: a. Bacteria b. Fungi c. Actinomycetes d. Viruses
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27) Mg and S are termed as: a. Primary nutrients b. Micronutrients c. Ultra micronutrients d. Secondary nutrients
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28) Mica is: a. 1:1 type clay mineral b. 2:1 type clay mineral, non expandable c. 2:2 type clay mineral, L is present inside the layer d. None of the above
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29) Microbial population of a soil in general a. Decreases with depth b. Increases with depth c. Constant throughout the profile d. No specific trend
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30) Mineralization of N refers to the conversion of : a. Organic form into inorganic form b. Inorganic form into organic form c. Organic form to nitrogenous compound d. All of the above
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31) Moisture content from lower upper plastic limit is known as: a. Sticky point b. Field capacity c. Plastic number d. All of the above
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32) Molybdenum is a component of: a. Chlorophyll b. Nitrogenase enzyme c. Cell wall of plants d. None of the above
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33) Montmorillonite is following type of clay mineral: a. 1;1 b. 2;2 c. 3;1 d. None of these
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34) Montmorillinite, illite and kaolinite are: a. Kinds of soil b. Clay minerals c. Kinds of protozoa present in soil d. Kinds of soil in U.S.A.
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35) More than 2.3 value of nutrient index indicates: a. Average productivity of soil b. Adequate fertility of soil c. Adequate productivity of soil d. None of them
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36) Most of the plants are likely to suffer if the soil volume occupied by air is less than ______ per cent. a. 20-25 b. 15-20 c. 12-15 d. 10-11
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37) Most resistant mineral present in soil is: a. Mica b. Hornblende c. Quartz d. None of above
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38) Muratt of potash contains: a. 40%K2O b. 36%K2O c. 50%K2O d. None of the above
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39) Mycorrhiza-infected plants show better ability of absorption of the nutreients, especially: a. Iron b. Manganese c. Potassium d. Phosphorus
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40) Mycorrihiza-infected plants show better growth than uninfected plants, especially on: a. Low fertility soils b. High fertility soils c. Marshy soils d. Desert soils
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41) N, P, K percent in cotton seed cake is: a. 4, 1.9, 2 b. 1.9, 2, 4 c. 4, 1.9, 1.7 d. 1.7, 4, 1
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42) Na Ai Si2O8 is the formula of: a. Anorthite b. Albite c. Mica d. Illite
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43) Which one of the following pairs is not correctly matched? a. Expanding type clay minerals - Higher water holding capacity b. Hight calcium content in soil - Iron chloride c. Water inundated soils - High nitrogen mineralization d. Sandy soils - Split application of fertilizers
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44) Which one of the following pairs is correct? a. Urea - 42% b. DAP - 20% c. (NH4)2 SO4 - 21.5% d. MoP - 47.5%
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45) Nitrate levels in drinking water above about ______ mg per litre are considered a human health hazard: a. 5 b. 10 c. 15 d. 20
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46) Nitrification in the soil take place by: a. Reduction process b. Oxidation process c. Biological oxidation d. Both (a) and (b)
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47) Nitrification is mainly carried out by: a. Hetero-trophic organism b. Photoauto-trophic organism c. Chemoauto-trophic organism d. None of the above
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48) Nitrogen is absorbed by the plants in the form: a. Only as NO3-1 b. Only as NH4+ c. Both (a) & (b) d. None of the above
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49) Nitrogen is an essential nutrient element for the plants because: a. It imparts early vigorous vegetative growth and dark green colour b. It provides extensive root system c. It strengthens straw and prevent lodging d. It stimulates seed formation
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50) Nitrogen is taken by the plants in the form of: a. Elemental nitrogen b. Nitrate c. Nitrite d. None of these
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