Carbon dioxide, 30

Causes of soil acidity, 10, 12, 13, 14

Caustic lime affects physical condition, 44, 46
acts on humus, 44, 47
frees inert plant food, 44
compared with limestone, 45
irrational use of, 44
may injure a sandy soil, 66, 85
right use of, 48

Caustic magnesian lime on sandy land, 66

Chemical changes produce acidity, 13

Clover, 17, 19, 87

Composition of limestone, 24, 30, 31, 46

Distribution of lime, 70, 78

Distributors, 80, 81

Dolomite, 30, 67

Equivalents in value, 69

Extent of soil acidity, 6, 11

Fineness of limestone, 39, 73

Frear, Dr. Wm., 50

Fresh burned lime, 44
composition and relative value of, 29, 31, 45, 69, 71

Gas lime, 62

Ground limestone, composition and relative value of, 30, 33, 69, 72

Hydrated lime, composition and relative value of 30, 31, 53, 71

Indications of soil acidity, 5, 15, 17, 18

Irrational use of lime, 9, 44

Land plaster, 76

Leaching, 12, 38

Lime for alfalfa, 86
alsike clover, 87
bluegrass, 88
crimson clover, 88
potatoes, 89
red clover, 87
most staple crops, 88
in fertilizers, 77
is unstable, 10
necessary content variable, 5
on sandy soils, 85

Limestone burned to effect distribution, 34
land, value of, 4, 6
varies in composition, 33

Litmus paper test, 20

Low-priced pulverizers, 35

Lump lime and hydrate compared, 71
limestone compared, 72

Magnesian lime, 64
limestone, 66

Magnesium, 30, 64

Marl, composition and relative value of, 59, 76

New York experiment station, 42

Old heaps of burned lime, 58

Oyster shells, composition and relative value of, 61, 75

Redtop, 18

Relative values of lime, 68, 71, 72

Removal of lime in crops, 14

Slaking lime, 53

Small applications may pay, 84

Soil acidity, cause of, 10, 12, 13, 14
extent of, 6, 11
indications of, 5, 15, 17, 18
tests for, 20, 21

Soils vary in lime requirement, 82

Sorrel and plantain, 15

Spreading farm-burned lime, 70, 80

Storing lime in the soil, 38

Storing limestone, 73

Source of lime, as:
agricultural lime, 58, 76
air-slaked lime, 31, 57
fresh-burned lime, 29, 31, 44
gas lime, 62
ground lime, 31
ground limestone, 30, 33
hydrat