Q421
Open questionSingle super phosphate contains
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Soil Science
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Q422
Open questionLeast resistant mineral to weathering is
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Q423
Open questionWho developed the DTPA tests for available soil micronutrients
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Q424
Open questionUrea of foliar spray should not contain biuret more than
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Q425
Open questionSilica-sesquioxide ratio is useful in the evaluation of soil in respect of
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Q426
Open questionSoil with high mechanical impedance requires
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Q427
Open questionNH+4 fixation takes place in
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Q428
Open questionAmmonium produced by urea can be absorbed by roots or it can
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Q429
Open questionDielectric constant of dry soil is
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Q430
Open questionMatch the following columns:
| Column I (Particulars) | Column II (Measuring instruments) |
| a. Hygroscopic humidity | 1. Irrometer |
| b. Canopy temperature | 2. Barometer |
| c. Atmospheric pressure | 3. Infra-red thermometer |
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Q431
Open questionExample of neutral igneous rock is
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Q432
Open questionTerm 'Bioavailable' was coined by
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Q433
Open questionA clay soil must contain at least . . . . . . . . Clay separate, to be designated a clay
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Q434
Open questionThe major nutrients are
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Q435
Open questionPlasticity of soil can be determined by using
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Q436
Open questionConsider the following statements. Cation exchange of soil colloidal clay is due to
1. Silicon tetrahedral layer
2. Isomorphous substitution
3. Hydration of clays
4. Broken edges of clay lattices
The correct sequence is
1. Silicon tetrahedral layer
2. Isomorphous substitution
3. Hydration of clays
4. Broken edges of clay lattices
The correct sequence is
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Q437
Open questionHill soils are generally
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Q438
Open questionAmmonium nitrate contains
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Q439
Open questionRhizobium of alfalfa group is
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Q440
Open questionCereal straw is a particularly rich source of
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