INDEX

Acid waters, [40]

Air in soil, [16], [70], [95]

Bars in estuaries, [122]

Black soils, [36]

Blowing sands, [22]

Bricks, [10], [16-18]

Chalk, [26], [96]

Chalk soils, [110-112]

Clay, [6], [9-21]

Clay soils, [75], [100-102]

Cliffs, [116-119]

Darwin's experiments, [11], [56]

Deltas, [122]

Drainage, [19], [96]

Dwellers in the soil, [53-63]

Earthworms, [54-56]

Error of experiment, [48]

Fallow, [14], [95]

Fens, [112]

Flora, [114]

Fords, [126]

Frost, action of, on soil, [83]

Grassland, [75]

Grit, [6]

Hales's experiment, [73]

Heaths, [104]

Heavy soils, [100]

Hoeing, [86-93]

Humus, [36], [51], [93], [125]

Hypotheses, [36]

Land slips, [12]

Leaf mould, [33]

Light soils, [104]

Lime, action of, on clay and soil, [19-21], [96-98]

Lime water, [19]

Loams, [2], [65], [108]

Marsh gas, [40]

Micro-organisms, [56-62]

Moorland, [80]

Mulch, [87], [90]

Peat, [37-40], [130]

Peat bogs, overflow of, [38]

Perspiration of plants, [74]

Plant food, [41-52], [62]

Plant requirements, [64]

Ploughing, [82]

Pot experiments, [41-52], [54], [69], [71]

Roads, [30-32], [101-112]

Rolling the soil, [84]

Sand, [6], [22-32], [41]

Sand dunes, [22]

Sandy soils, [68-72], [102-108]

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]

Van Helmont's experiment, [46]

Villages, situation of, [24], [30], [126]

Wastes, [101], [104]

Water content of soil, [88-93]

Water, movement of in soils, [65-68]

Water supply and plant growth, [69-74]

Weathering, [116]

Weeds, [94], [97]

Woodland, [80], [101]