Question
The reaction of a soil refers to its acidity or
alkalinity. It is acidity or alkalinity. It is an important indicator of soil health. It can be easily measured and is usually expressed by the pH value. i. Most soils are in the pH range of 5 – 8, while the range for plant growth is within pH 3 – 10. ii. Unfavourable high pH values, as observed in alkali soils, can be decreased by amendment with materials such as gypsum, elemental S or iron pyrites. iii. pH of 7.5 – 8.5 is generally called the neutral range. iv. Plants are generally more sensitive to strong alkalinity, where the dominant cation is often Na, than to strong acidity where the dominant cation is H. Out of the following which combination of statements are correct?Solution
Statement (iii) is incorrect. pH 7 is considered neutral, and the range 7.5-8.5 is slightly alkaline.
In the question below, two statements (I) and (II) are given. These statements may be either independent causes or may be effects of independent cause...
Select the number from among the given options that can replace the question mark ‘?’ in the following series.
30, 34, 42, 58, ‘?’, 154
In the question below, two statements (I) and (II) are given. These statements may be either independent causes or may be effects of independent cause...
In each of the following questions, two statements numbered I and II are given. There may be cause and effect relationship between the two statements....
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In the question below, two statements (I) and (II) are given. These statements may be either independent causes or may be effects of independent cause...
In the following question, select the related number from the given alternatives.
15 : 195 :: 18 : ?
Who sits second to the left of the one who sits opposite to D?
Effect : With over 27 lakh seats lying vacant in various engineering institutes across the country, All India Council of Technical Education (AICTE) ha...
Statements:
I: The Government has imported large quantities of crude petroleum as per trade agreement with UAE.
II: The prices of c...
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