Shrinkage of clay, [10]

Silt, [7]

Soil sampler, [82], [88]

Sowing seed, [84]

Springs, [24-31], [111]

Subsoil, [2], [4], [42], [48-51]

Swelling of clay, [11]

Swelling of peat, [38]

Temperature of soil, [86-93]

Tilth, [86]