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A Practical Test
Determining Lime Requirement
Irrational Use Of Lime
Soil Acidity
The Litmus-paper Test
The Unproductive Farm
Where Clover Is Not Wanted


Crops And Methods For Soil Improvement

A Bit Of Arithmetic
A Clean Seed-bed
A Few Combinations Are Safest
A Southern Legume
A Three Years' Rotation
Acid Phosphate
Acquaintance With Terms
Adaptation To Eastern Needs
Affecting Physical Condition
All The Nitrogen From Clover
Alsike Clover
Amount Of Application
Amount Of Manure
Amount Per Acre
An Excess Of Nitrogen

Soil Acidity

Lime performs various offices in the soil, but farmers
should be concerned chiefly about only one, and that is the destruction
of acids and poisons that make the soil unfriendly to most forms of
plant life, including the clovers, alfalfa, and other legumes. Lime was
put into all soils by nature. Large areas were originally very rich in
lime, while other areas of the eastern half of the United States never
were well supplied. Within the last ten years it has been definitely
determined that a large part of this vast territory has an actual lime
deficiency, as measured by its inability to remain alkaline or "sweet."
Many of the noted limestone valleys show marked soil acidity. There has
been exhaustion of the lime that was in a state available for union
with the acids that constantly form in various ways. The area of soil
thus deficient grows greater year by year, and it can be only a matter
of time when nearly all of the eastern half of this country will have
production limited by this deficiency unless applications of lime in
some form are made. When owners of soil that remains rich in lime do
not accept this statement, no harm results, as their land does not need
lime. On the other hand are tens of thousands of land-owners who do not
recognize the need of lime that now exists in their soils, and suffer a
loss of income which they would attribute to other causes.

Next: Irrational Use Of Lime

Previous: The Unproductive Farm

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