Commercial Fertilizers. 635
available and total phosphoric acid. Some manufacturers
y also have used muriate of potash in making fertilizers in
which the potash was guaranteed from sulphate.
Methods of Reporting Results. Nitrogen is separated into
the various forms in which it occurs, namely, nitrogen in
. nitrates, nitrogen in ammonia salts and organic nitrogen.
In bones, the bone phosphate of lime equivalent is given
and the percentage of fineness is shown also, fine bone being
that which passes through a sieve with meshes one-twenty-
fifth inch square, and medium bone that which passes
through a sieve with meshes one-sixth inch square, but not
including the fine bone. The analyses are grouped under
tables, the classification being based upon the nature of the
fertilizer, as follows:
Table 1. Complete fertilizers.
Table 2. Bones, tankage and mixtures of bone and
potash.
’ Table 3. Acid Phosphates.
Table 4. Acid phosphate and potash mixtures.
Table 5. Nitrogenous superphosphates.
Table 6. Potash Salts.
Table 7. Nitrate of soda.
Free Analysis of Fertilizers. It is hoped that farmers
who purchase fertilizers in quantity, at least, will take
i advantage of Section 8 of the fertilizer law, and send a
sample to the Station for free analysis.
Essentials in Ta/ting Samples. 1. Take it at the time of
purchase and if possible in the presence of agent or seller.
2. Take a sample from not less than two bags, and from one
additional bag for every ten purchased; mix these samples
carefully and take at least a pint of this mixed sample, put
into a fruit jar, seal, box and express to J. H. Kastle,
Director, Lexington, Ky. 3. Take the sample in the pres-
ence of at least one witness, and have the witness sign the ~
required certificate. 4. The certificate for free analysis to
be sent by mail, and should be in accordance with the law as
given in section S.
If the sample is taken in accordance with the above direc-