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THE NEED OF COMMERCIAL FERTILIZERS

Fertilizer Tests
Loss Of Plant-food
Phosphoric-acid Requirements
Physical Analysis
Potatoes And Crimson Clover
Prejudice Against Commercial Fertilizers
Soil Analysis
The Need Of Potash
The Use Of Nitrogen

More from THE NEED OF COMMERCIAL FERTILIZERS

Crops And Methods For Soil Improvement


A Bit Of Arithmetic
A Clean Seed-bed
A Few Combinations Are Safest
A Practical Test
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



Physical Analysis








Chemical analysis is costly and unsatisfactory as a
guide to fertilization. Physical analysis by a competent man may have
distinct value, and especially to one lacking experience with his soil.
The mapping of soils by national and state authorities has given pretty
accurate knowledge of hundreds of soil types, their location and
characteristics, and when a soil expert obtains a sample of soil and
the history of its past treatment, he can assign it to its type and
give to its owner dependable advice regarding its crop-adaptation and
probable fertilizer requirements.





Next: The Use Of Nitrogen

Previous: Soil Analysis



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