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 a certain code language, ‘MOTH’ is coded as ‘2514’ and ‘TOME’ is coded as ‘1453’.
What is the code for ‘E’ in that languag...
Pointing to a man in a photograph a woman says, "He is the father of my only daughter-in-law's father-in-law". How is the man related to the woman?
Three of the following four word pairs are alike and thus form a group. Select the word pair that does NOT belong to that group.
Three of the following four are alike in a certain way and thus form a group. Which is the one that does NOT belong to that group?
(NOTE: Operati...
Statement: A ≤ D < C = B > E ≥ F < G
Conclusions: I. B > A
II. C < F
Seven people, A, B, C, D, E, F and G are sitting in a straight line, facing north. Only three people sit to the left of D. Only two people sit between D...
In a certain code language, ‘art of war’ is coded as ‘gb pr ml’ and ‘the lost art’ is coded as ‘ml sj ak’. How is ‘art’ coded in the...
‘A # B’ means ‘A is the brother of B’.
'A @ B' means 'A is the daughter of B'.
‘A & B’ means ‘A is the husband of B’.
...Identify the number that does NOT belong to the following series.
3, 7, 12, 21, 57, 109, 276, 499
Which is the correct alternative for X?
Aeroplane: Cockpit :: Train : X