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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