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Tons to
Teaspoons – How to Convert Rates of Fertilizer Per Acre to Amounts for Small
Areas
The tables
presented below are given as guides in determining the amounts of various
fertilizers to be used for different volumes of soil, single potted plants,
single rows and small areas. The conversions in the tables are not exact,
but they are accurate enough to guide you in determining the proper amount of
fertilizer. It should be pointed out that the rates given in these tables are
not intended as recommendations but are given as conversion guides. For
actual fertilizer recommendations, consult your local County Agent or report of
your soil test results.
In general,
the volume of fertilizer to be applied varies with different materials because
of weight differences. For example, granular sodium nitrate weighs
approximately 23 ounces per pint, whereas granular ammonium nitrate weighs
approximately 13 ounces per pint.
Some equivalents
that may be helpful are:
1 acre is equal to 43, 560 square feet
1 pint of water weighs 1 pound
1 pint equals, 2 cups, 32 tablespoons, 96 teaspoons
TABLE 1. CONVERSIONS FOR FLOWERPOTS OR
FLOWER BOXES
Pounds
Per
*
Dissolve 1 teaspoon of fertilizer in a pint of water and add amounts of
this mixture given in the table for flowerpots
Materials Grouped According to Approximate Weight per pint (13 oz./pt.)
or
Ground Limestone
(23oz./pt.)
*Higher rates given for limestone.
TABLE 3. APPROXIMATE VOLUMES OF
FERTILIZER FOR A GIVEN VOLUME OF SOIL Mixed Fertilizers or Potassium Chloride or Ammonium Phosphate Ammonium Nitrate or Urea Ammonium Sulfate or Superphosphate Nitrate of Soda or Ground Limestone or Cottonseed Meal
Volumes of Average Fertilizer
Flowerpots (See Footnote)*
Flower Boxes
4-inch
6-inch
8-inch
1 Square Foot
2 Square Feet
Teaspoons
Tablespoons
Tablespoons
Teaspoons
Teaspoons
250
2 1/2*
1 1/2*
5*
1/2
1
500
5*
3*
10*
1
2
750
7 1/2*
5*
15* (1 cup)
1 1/2
3
1000
10*
7*
20* (1 1/4 cup)
2
4
TABLE 2. APPROXIMATE VOLUMES OF FERTILIZER FOR SMALL AREAS
Rate Per Acre
Use These Weights Per Specified Area
Use These Volumes Per Specified Area
Use These Volumes Per 3' Rows
100 Sq. Ft. Pounds
1000 Sq. Ft. Pounds
10 Sq. Ft. Tbsps.
100 Sq. Ft. Tbsps.
10 Ft. Cups
100 Ft. Pints
Sulfur, Flowers of Cottonseed Meal (10oz./pt.)
100
0.2
2.3
1.2
3/4
0.2
1
300
0.7
6.9
3.6
2
0.6
3
500
1.2
11.5
6.0
4
1.1
5 1/2
1000
2.3
23.0
12.0
7 1/2
2.2
11
Ammonium
Nitrate Urea
100
0.2
2.3
0.9
1/2
0.2
7/8
300
0.7
6.9
2.7
1 3/4
0.5
2 1/2
500
1.2
11.5
4.5
3
0.8
4
1000
2.3
23.0
9
5 1/2
1.6
8
Ammonium Phosphate Mixed Fertilizer Potassium Chloride
(16 oz./pt.)
100
0.2
2.3
0.7
1/3
0.1
1/2
300
0.7
6.9
2.1
1 1/2
0.3
1 1/2
500
1.2
11.5
3.5
2 1/4
0.7
3 1/2
1000
2.3
23.0
7
4 1/2
1.4
7 1/2
Ammonium
Sulfate Superphosphate (19 oz./pt.)
100
0.2
2.3
0.6
1/2
0.1
1/2
300
0.7
6.9
1.8
2
0.3
1 1/4
500
1.2
11.5
3
4
0.6
3
1000
2.3
23.0
6
8
1.2
6
Nitrate of Soda
100
0.2
2.3
.5
1/3
0.1
1/2
300
0.7
6.9
1.5
1
0.3
1 1/8
500
1.2
11.5
2.5
1 1/2
0.5
2 1/2
1000
2.3
23.0
5
3
1
5
2000*
4.6
46.0
10
6 1/2
2
10
Fertilizer Materials
Rate Per Acre
Volumes of Fertilizer for These Volumes of Soil
Per Cubic Yard
Per Cubic Foot or 7 1/2 gallons
5 gallons
1 gallons
Tablespoons
Cups
Teaspoons
Tablespoons
Teaspoons
Teaspoons
100
4
1/4
1/2
0
1/3
0
300
12
3/4
1 1/3
0
1
0
500
20
1 1/4
2 1/4
3/4
1 2/3
1/3
1000
40
2 1/2
4 1/2
1 1/2
3 1/4
3/5
100
5
1/3
2/3
0
1/2
0
300
15
1
1 1/2
1/2
1 3/4
0
500
25
1 1/2
2 3/4
7/8
2
2/5
1000
50
3 1/8
5 1/2
1 3/4
4
1/2
100
3 1/3
1/5
2/5
0
1/4
0
300
10
5/8
1 1/5
0
3/4
1/4
500
16 3/4
1
2
2/3
1 1/4
1/2
1000
33 2/3
2
3 3/4
1 1/4
2 3/4
1
100
2 3/4
0
1/3
0
1/5
0
300
8 1/2
1/2
1
1/3
3/4
0
500
14
7/8
1 1/2
1/2
1 1/5
1/4
1000
28
1 3/4
3
1
2 1/5
1/2
2000
56
3 1/2
6
2
4 1/2
1
Sulfur
100
6 1/2
1/3
4/5
0
1/2
0
300
19
1 1/4
2
2/3
1 1/2
0
500
32
2
3 2/3
1 1/4
2 2/3
1/2
1000
64
4
7 1/3
2 1/3
5 1/5
1