Tortuosity in soil refers to the actual path that fluids must travel through soil pores, which is more complex and longer than a straight line. Since the path is never direct, tortuosity is always greater than 1. This affects water and air movement in soils.
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| List I (Name of Author) |
List II (Name of Book) |
| (A) Rachel Carson |
(I) Elements of Agricultural Chemistry |
| (B) Humphry Davy |
(II) Natures of Plant |
| (C) Theophrastus |
(III) Soil Genesis and Classification |
| (D) S. Buol |
(IV) Silent Spring |
| List-I (Method) |
List-II (Estimation) |
| (A) Kjeldal method |
(I) Estimation of Soil moisture |
| (B) Walkley and Black method |
(II) Estimation of Sedimentation of soil particles |
| (C) Hydrometer method |
(III) Estimation of Organic carbon |
| (D) Gravimetric method |
(IV) Estimation of Nitrogen |
