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Bulletin 2&&- January, 1929

THE UNIVERSITY OF NEW HAMPSHIRE
AGRICULTURAL EXPERIMENT STATION

DEPARTMENT OF AGRICULTURAL CHEMISTRY

Inspection of Commercial
Fertilizers for 1928

MADE FOR THE

STATE DEPARTMENT OF AGRICULTURE

T. G. Phillips, T. O. Smith and F. S. Schlenker
THE UNIVERSITY OF NEW HAMPSHIRE

DURHAM, N. H.

INSPECTION OF COMMERCIAL
FERTILIZERS

MADE FOR THE
STATE DEPARTMENT OF AGRICULTURE

The inspection of commercial fertilizers reported in this
bulletin was made under the direction of the Honorable
Andrew L. Felker, Commissioner of Agriculture. The
state inspector, Mr. Eugene D. Sanborn, collected samples
of 128 brands of fertilizer materials which were offered
for sale by dealers or had been delivered to consumers
between March and June, 1928. The general character of
the fertilizer materials collected is shown by the following
classification :

Complete fertilizer 96

Nitrogen and phosphoric acid 1

Nitrate of soda 7

Ground bone 6

Sheep manure 6

Superphosphate (acid phosphate) 3

Sulphate of ammonia 2

Tankage 2

Sheep and goat manure 2

Goat manure 1

Basic slag 1

Muriate of potash 1

128

2-37

2 N. H. AGR. EXPERIMENT STATION [ Bulletin -2§&

THE FERTILIZER LAW.

The New Hampshire fertilizer law applies to all fertilizer
materials offered for sale, whether mixed materials in the
form of complete fertilizers or unmixed materials as super-
phosphate (acid phosphate), nitrate of soda, ground bone,
tankage, etc. Under the provisions of the law every manu-
facturer or dealer who shall sell or offer for sale any fer-
tilizer material shall furnish with each lot or package a
clearly printed statement certifying the brand name under
which it is sold, the name and address of the manufacturer,
the number of net pounds the package contains and a
chemical analysis stating the minimum percentages of
nitrogen, of total phosphoric acid, of available phosphoric
acid and of water soluble potash. No person shall sell or
offer for sale any pulverized leather, hair or wool waste,
peat, garbage tankage, or any inert material whatsoever,
without an explicit printed statement of the fact conspicu-
ously fixed to every package of such material.

The state official in charge of the administration of the
fertilizer law is the Commissioner of Agriculture.

In Table I are given the grades of complete fertilizers
collected, the number of brands found in each grade, the
average analysis of each grade and the average retail price
per ton.

Jan., 1929] fertilizer inspection, 1928

TABLE I

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1.06

0.115

8.98

3.99

41.00

1 — 10 — 3

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0.84

10.91

10.35

3.00

2 — 8 — 2

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1.83

8.67

8.11

2.25

36.67

2 — 8 — 10

3

1.85

8.72

7.91

10.49

49.67

2 — 9 — 3

6

1.70

9.42

8.93

3.10

41.83

2 — 10 — 2

4

1.71

10.53

9.98

2.20

36.25

2 — 10 — 4

1

1.76

11.09

10.45

4.36

2—12 — 4

3

1.97

12.46

11.82

4.39

41.67

3 — 8 — 4

11

2.55

8.81

7.96

4.09

40.18

3 — 8 — 6

1

3.09

10.10

8.20

6.56

3 — 8 — 10

1

2.72

9.18

8.14

10.00

....

3 — 10 — 4

1

2.51

10.56

9.48

4.05

48.66

3 — 10 — 6

2

2.64

11.10

10.27

6.16

42.50

3 — 12 — 3

1

2.70

12.60

12.00

3.04

33.40

4 — 6 — 10

9

3.32

6.80

6.13

10.13

47.22

4—8 — 4

8

3.34

8.79

8.01

4.17

44.29

4 — 8 — 6

1

3.29

8.58

8.00

6.36

50.00

4 — 8 — 7

3

3.35

8.86

8.41

7.06

47.33

4 — 8 — 10

2

3.31

8.55

8.00

10.08

52.50

4 — 10 — 4

1

3.35

11.16

10.52

4.08

50.00

4 — 12 — 4

1

3.39

12.58

12.33

4.59

120.00

4 — 16 — 4

1

3.44

17.12

16.04

4.28

42.60

5 — 8 — 7

12

4.14

8.81

7.95

7.12

48.34

5 — 10 — 5

3

4.09

10.98

10.15

5.28

44.30

6 — 6 — 4

1

4.88

6.97

6.45

3.77

57.00

6 — 8 — 5

1

4.93

10.66

10.16

4.73

7 — 6 — 5

6

5.48

6.93

6.22

5.02

52.66

8 — 6 — 6

2

6.32

6.90

6.39

5.65

49.30

8 — 16 — 8

1

6.57

17.93

17.35

8.11

57.00

10 — 3 — 8

1

8.52

4.40

3.86

7.62

80.00

10 — 3.5 — 8

1

8.26

8.00

4.42

8.33

10 — 16 — 14

1

7.83

17.63

17.07

13.36

67.66

CONFORMITY TO GUARANTEE

Fifty-five of the 128 brands analyzed were found to
contain less than the guarantee of one or more of the three
constituents. The total number of guarantees on the 128
brands was 444, the total number of deficiencies 87, the
per cent deficient 19.6. This shows some improvement over
last year when the corresponding per cent was 24.5. Many
of these deficiencies were comparatively negligible, however,
the small deficiency in one constituent being offset in value
by overrun in other constituents.

A detailed summary of the deficiencies in the 55 brands
which failed to meet their guarantees follows :

4 n. h. agr. experiment station [ Bulletin "238

Total
Brands Deficiencies

Nitrogen, total phosphoric acid, available

phosphoric acid and potash 1 4

Nitrogen, total phosphoric acid and potash 0 0

Nitrogen, available phosphoric acid and

potash- 0 0

Nitrogen, total phosphoric acid and avail-
able phosphoric acid

Nitrogen and total phosphoric acid

Nitrogen and available phosphoric acid....

Nitrogen and potash

Nitrogen

Total phosphoric acid, available phos-
phoric acid and potash

Total phosphoric acid and potash

Available phosphoric acid and potash

Potash

Total phosphoric acid and available phos-
phoric acid

Total phosphoric acid

Available phosphoric acid

55 87
NITROGEN DEFICIENCIES

Seven brands of nitrate of soda and two brands of sul-
phate of ammonia were analyzed. All met their guarantee.
One hundred fourteen brands were guaranteed to contain
nitrogen in amounts varying from 0.82 per cent to 8.22
per cent. Twenty-two of these failed to meet the guaran-
tee. Six were below the guarantee by less than one-tenth
per cent. Seven were below by more than one-tenth per
cent but less than two-tenths per cent. Five were below by
more than two-tenths per cent but less than three-tenths
per cent. Two were below by more than three-tenths
per cent but less than four-tenths per cent. One was
below by more than four-tenths per cent but less than
one-half per cent. One failed to meet the guarantee by
0.54 per cent.

2

6

2

4

1

2

8

16

8

8

4

12

0

0

0

0

5

5

6

12

14

14

4

4

Jan., 1929] fertilizer inspection, 1928 5

PHOSPHORIC ACID DEFICIENCIES

Three brands of sixteen per cent acid phosphate were
analyzed and found to meet the guarantee. One hundred
fifteen other brands were guaranteed to contain phos-
phoric acid. Twenty-nine of these were deficient in total
phosphoric acid and eighteen in available phosphoric acid.
Eleven failed to meet the guarantee of total phosphoric
acid by less than one-fourth per cent. Thirteen were
more than one-fourth per cent below but less than one-
half per cent. Four were more than one-half per cent
below but less than three-fourths per cent. One was
more than three-fourths per cent below but less than one
per cent. Seven failed to meet the guarantee in available
phosphoric acid by less than one-fourth per cent. Three
were more than one-fourth per cent below but less than
one-half per cent. Six were more than one-half per cent
below but less than three-fourths per cent. Two were
more than one per cent below.

POTASH DEFICIENCIES

One sample of muriate of potash was analyzed and
found to meet the guarantee. One hundred six other
brands were guaranteed to contain potash in amounts
varying from 2.00 per cent to 14.00 per cent. Eighteen of
these failed to meet the guarantee. Ten were deficient by
less than one-fourth per cent. Five were deficient by
more than one-fourth per cent but less than one-half per
cent. Two were deficient by more than one-half per cent
but less than three-fourths per cent and one was deficient
by more than three-fourths per cent but less than one
per cent.

In the tabulation of the analyses in the following
pages deficiencies of two-tenths of one per cent or more
are shown in Italics. The names of the manufacturers
are arranged alphabetically, and under the manufacturer
the different brands are arranged alphabetically or
numericallv by formula.

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