Soil Science - Study Mode

[#531] Total Mn of a soil sample after digestion with HF (not upto dryness) can be measured through
Correct Answer

(B) Teflon nebulizer

Explanation

Solution: Total Manganese of a soil sample after digestion with HF (not up to dryness) can be measured through a Teflon nebulizer . It can produce excellent mist and can handle a high level of particulates in the sample. The elements can only be recovered by using hydrofluoric acid (HF).

[#532] The Standard sea-level pressure at 45° latitude at a temperature of 15°C is
Correct Answer

(A) 1013.25 mb

Explanation

Solution: The standard sea-level pressure at 45 degrees latitude at a temperature of 15 degrees Celsius is 1013.25 mb (millibars). Meteorologists use a metric unit for pressure called millibar. The depth of the atmosphere is greatest at sea level and decreases at higher altitudes because more air is pressing down from above.

[#533] Red soils to India are poor in
Correct Answer

(C) Both of these

Explanation

Solution: Red soils in India are poor in Nitrogen and Phosphorus. They are also poor in lime, magnesia and humus. Red soil contains a high percentage of iron content, which is responsible for its colour. It also contains large amounts of clay and is generally derived from the weathering of crystalline and metamorphic rocks.

[#534] One number of fertiliser sale points in India are
Correct Answer

(A) 230000

Explanation

Solution: Fertilizer sale points in India are around 230000. Fertilizer use and production in India have risen the production and sales units. Fertilizers have played a crucial role in the journey of Indian agriculture through the mode of the green revolution.

[#535] Downey mildew of pearlmillet may be suppressed by increased soil levels of
Correct Answer

(C) Cl

Explanation

Solution: The Downey mildew of bajra or pearl millet is a common disease in India and is also known as green ear, it destroys much of the crop every year. It is caused by a fungus (oomycetes or water mould). Downey mildew of pearl millet may be suppressed by increased soil levels of Chlorine .