38. Permanent wilting percentage is that amount of water in the soil at which

(a)  Plant remain normal

(b)  Plant show vigorous growth

(c)   Plant is permanently wilted

(d)  Plant undergoes temporary wilting

Ans. (c)      At permanent wilting percentage or co-efficient (PWC) the soil contains 1–15% water depending upon its texture (about 10% in loam soil). After permanent wilting the plant dies.