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.
According to Mass Flow Hypothesis the sugar is moved in the form of ____into the companion cells and then into the living phloem sieve tube cells by...
Which of the following viral diseases of tomatoes is transmitted by the whitefly, Bemisia tabaci, in a persistent manner?
Which method is most suitable for the plantation of fruit trees in slopy areas?
Short term credit is usually for a period of ranging up to:
Blast disease of rice is due to occurrence of which organism?
Which of the following is used in neutron moisture meter as neutron source?Â
Which of the following is NOT correctly matched?
Which cells help in immunity development?
The process during insect embryogenesis where the head end of the developing embryo moves toward the posterior pole of the egg is termed as:
Which is a single use plan that covers a relatively large set of activities?
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