Soil Science - Study Mode

[#866] Resistance to pests and diseases is often provided by
Correct Answer

(C) K

Explanation

Solution: Resistance to pests and diseases is often provided by Potassium . Potassium is associated with the movement of water, nutrients and carbohydrates in plant tissues. It involves enzyme activation within the plant, which affects protein, starch, and adenosine triphosphate (ATP) production. Plant disease resistance protects plants from pathogens by pre-formed structures and chemicals and by infection - induced responses of the immune system.

[#867] The change of NH + 4 to NO - 3 is called as
Correct Answer

(A) Nitrification

Explanation

Solution: Nitrification is the biological oxidation of ammonia (NH + 4 ) to nitrite (NO - 3 ) followed by the oxidation of the nitrite to nitrate. Both the processes occur in the presence of different microorganisms. It is an important step in the nitrogen cycle in the soil. It is an aerobic process performed by small groups of autotrophic bacteria.

[#868] Journal 'Plant and Soil' is published from
Correct Answer

(B) The Netherlands

Explanation

Solution: Journal “Plant and Soil” is published by the Royal Netherlands Society of Agricultural Science (Netherlands) . It is edited by Hans Lambers. It is a monthly peer-reviewed scientific journal covering research on the relationships between Plant and soil, such as relationships and interactions of plants with minerals, water and microbes, the anatomy and morphology of roots, soil biology and ecology.

[#869] Greatest damage to fertiliser is caused by
Correct Answer

(C) Hooks

Explanation

Solution: Use of hooks to pick and drop the sacks of fertilizer cause the greatest damage to it. As hooks are the sharp objects which make holes in the bags which may allow air and water to react with the chemicals in the fertilizer.

[#870] Neutralizing value of Dolomite is
Correct Answer

(D) 108.7

Explanation

Solution: Effective neutralizing value or ENV means a relative value using the calcium oxide content, magnesium oxide content, and fineness to express the effectiveness of the agricultural liming mineral in neutralizing soil acidity. Dolomite is an anhydrous carbonate mineral composed of calcium and magnesium carbonate. Neutralizing value of Dolomite is 108.7