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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



Fertilizer Tests








Every farmer should conduct some fertilizer tests
for himself. It is only the soil itself that can make an adequate reply
to a question regarding its needs. The test should be made under
conditions furnishing evenness in the soil, and it should be continued
for years. There is pleasure to an intelligent farmer in such
questioning of his soil, and only in this way can assurance be obtained
that the investment in fertilizers is the wisest that can be planned
for the farm.

There are only three plant constituents to be tested, but they must be
used in combination as well as singly. A soil that is deficient in the
three may not give any return from potash alone, and usually does not,
although it may give a marked increase from use of phosphoric acid
alone. The plats may be eight rods long and one rod wide, containing
each one twentieth of an acre, and having strips two feet wide
separating them. The following chart suggests quantities of fertilizers
to be used on the one-twentieth acre plats, 10 in number:

+---------------------------------------+
Nothing.
+---------------------------------------+
5 pounds nitrate of soda.
+---------------------------------------+
18 pounds 14 per cent acid phosphate.
+---------------------------------------+
4 pounds muriate of potash.
+---------------------------------------+
Nothing.
+---------------------------------------+
5 pounds nitrate of soda.
18 pounds 14 per cent acid phosphate.
+---------------------------------------+
5 pounds nitrate of soda.
4 pounds muriate of potash.
+---------------------------------------+
18 pounds 14 per cent acid phosphate.
4 pounds muriate of potash.
+---------------------------------------+
5 pounds nitrate of soda.
18 pounds 14 per cent acid phosphate.
4 pounds muriate of potash.
+---------------------------------------+
Nothing.
+---------------------------------------+





Next: Variation In Soil

Previous: The Need Of Potash



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