TONS TO TEASPOONS
How to Convert Fertilizer Applications in Pounds per Acre
into Amounts for Small Areas
Table 1
Conversions for flowerpots or flower boxes
At these Rates
Per Acre
500
1000
4-inch
.05*
.10*
Use These Volumes of Average Fertilizer (in tsp.)
Flowerpots
Flower Boxes
6-inch
8-inch
1 sq ft
2 sq ft
.10*
.30*
1
2
.20*
.60*
2
4
*Since it is difficult to measure this small amount, you can dissolve 1 teaspoon of fertilizer in a pint of water and add appropriate proportion to the
flowerpot.
Instructions for using Table number 2 are on the reverse side of this page.
Table 2
Find Your Material
in the List Below
Material Grouped
According to
Approximate Weight
per Pint
Activated Sewage
Sludge
Dried Blood
Sulfur
(10 oz per pint)
Ammonium Chloride
Ammonium Nitrate
Urea
(13 oz per pint)
Ammonium Phosphate
Gypsum
Mixed Fertilizers
Potassium Chloride
(16 oz per pint)
Ammonium Sulfate
Calcium Nitrate
Mixed Fertilizers
Superphosphate
(19 oz per pint)
Ground Limestone
Potassium Sulfate
(23 oz per pint)
Find the
Recommended
Rate per Acre
Amounts
per Acre
Determine the Amount of Fertilizer Needed for Your Specific Area
Use These Weights
per Specified Area
Use These Volumes per Specified Area
10 Feet of Row Spaced*
Lbs
100
100 sq ft
Lbs
.2
1000 sq ft
Lbs
2.3
10 sq ft
Tbsps
1.2
100 sq ft
Pints
.4
1 ft
Tbsps
1.2
2 ft
Tbsps
2.4
3 ft
Cups
.2
500
1000
1.2
2.3
11.5
23.0
6.0
12.0
1.9
3.7
6.0
12.0
1.1
100
500
1000
.2
1.2
2.3
2.3
11.5
23.0
.9
4.5
9.0
.3
1.4
2.8
.9
4.5
1.8
9.0
.2
.8
100
500
1000
.2
1.2
2.3
2.3
11.5
23.0
.7
3.5
7.0
.2
1.2
2.3
.7
3.5
1.4
7.0
.1
.7
100
500
1000
.2
1.2
2.3
2.3
11.5
23.0
.6
3.0
6.0
.2
1.0
2.0
.6
3.0
1.2
6.0
.1
.6
.2
.8
1.6
3.2
.5
2.5
1.0
5.0
.1
.5
100
.2
2.3
.5
500
1.2
11.5
2.5
1000
2.3
23.0
5.0
2000
4.6
46.0
10.0
*Since high rates are not desirable in row fertilization, they are omitted in this table.
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170
To use Table 2, follow the three steps below:
1.
Find your material.
2.
Find the recommended rate per acre.
3.
Determine the amount of fertilizer needed for the area to be fertilized.
For example, if your material is ammonium sulfate and the recommended rate is 500 pounds per acre, then for a
100 foot area, use 1.2 pounds or 1 pint of fertilizer. For 10 feet of row spaced 1 foot apart, use 3 tablespoons.
For 10 feet of row spaced 3 feet apart, use 0.6 cup.
To figure the volume of fertilizers not listed, scoop the material loosely into a 1-pint container and weigh
carefully. If the material weighs 16 ounces, for example, you would use the third block in Table 2.
Teaspoons
1/4
1/2
1
3
6
12
24
48
Tablespoons
1
2
4
8
16
Equivalent Liquid U.S. Measures
for Lawn & Garden Use
Cups
Pints
Quarts
1/4
1/2
1
2
4
16
1/4
1/2
1
2
8
Equivalents
1 acre is equal to 43,560 square feet (this is a plot
about 209 x 209 feet).
1 pint of water weighs about 1 pound.
1 pint is equal to 2 cups, or 32 tablespoons, or 96
teaspoons.
1
4
Gallons
1
Ounces
1/24
1/12
1/6
1/2
1
16
32
128
Abbreviations
Cup = c
Pound = lb
Gallon = gal
Quart = qt
Ounce = oz
Tablespoon = tbs; T
Pint = Pint
Teaspoon = tsp
These tables and articles were taken from the U.C. Division of Ag and Natural Resources; originally printed as Leaflet No. 2285 and
also from the Minnesota Department of Agriculture 4/95 Application Guide.
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