Question

pH range of soil mostly suitable for crop production is-
(a) 6-7.5
(b) 5-5.5
(c) 7-8
(d) 3-4​

Answer 1

Answer:

a) 6-7.5

Explanation:

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Answer 2

Answer:

(a) 6-7.5

Explanation:

Soil pH shows the potentiality of H+ ions. It determines acidic or alkaline reaction of the soil. More hydrogen ion (H+) concentration shows the acidic nature of soil, while the concentration of more hydroxyl (OH-) ions represents its alkaline nature. Neutral condition is produced by an equal concentration of H+ and OH- ions. Slightly acidic soils are more suitable for plant growth.

Maximum nutrients are available to crops when the pH ranges from 6.5 to 7. Soil pH can be measured by pH meter, pH paper method or pH scale. pH scale has a range of 0–14 with 7 as the neutral point, which indicates the equal concentration of H+ and OH- ions.

As the value decreases, it indicates higher concentration of H+ ions. Soils with minimum pH are more acidic in nature. Similarly, as the pH goes above 7, the alkaline reaction of the soil increases with the concentration of OH- ions.