41.
Earthworm cast is rich in which nutrient?

42.
For saline-sodic soils EC, ESP & pH values are

43.
The purpling along the leaf edges is the characteristic deficiency symptom of

44.
A soil which has pH < 8.5, ESP < 15 and EC > 4 dSm-1 at 25°C is called

45.
Which one of the following is not correctly matched in the term of Soil order and Pronunciation?

46.
Flame photometer is used in the determination of

47.
The behaviour of the plant in relation to day length is termed

48.
Among the following, the correct sequence of biotic biopolymer degradation pathway is

49.
Browning disease of rice is a

50.
Limonite is the source of

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