# Fertilizer Conversion Table for Small Area

Jim Jian Wang, Stevens, Jr., J. Cheston

Tons to Teaspoons - How to Convert Rates of Fertilizer Per Acre to Amounts for Small Areas

Use the tables below to determine 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. 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

 PoundsPer Acre 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 ½*

1 ½*

5*

½

1

500

5*

3*

10*

1

2

750

7 ½*

5*

15* (1 cup)

1 ½

3

1000

10*

7*

20*
(1 1/4 cup)

2

4

* Dissolve 1 teaspoon of fertilizer in a pint of water and add amounts of this mixture given in the table for flowerpots

 Table 2. Approximate Volumes of Fertilizer for Small Areas Materials Grouped According to Approximate Weight Per Pint Rate Per AcrePounds Use These Weights Per Specified Area Use These Measures Per Specified Area Use These Volumes Per 3' Rows 100 Sq. Ft.Pounds 1000 Sq. Ft.Pounds 10 Sq. Ft.Tbsps 100 Sq. Ft.Cups 10 Ft.Cups 100 Ft.Pints Sulfur, Flowers of Cottonseed Meal (10oz./pt.) 1003005001000 .2.71.22.3 2.36.911.523.0 1.23.66.012.0 3/4247 1/2 .2.61.12.2 135 1/211 Ammonium Nitrate Urea (13 oz./pt.) 1003005001000 .2.71.22.3 2.36.911.523.0 .92.74.59 1/21 3/435 1/2 .2.5.81.6 7/82 1/248 Ammonium phosphate Mixed Fertilizer Potassium chloride(16 oz./pt.) 1003005001000 .2.71.22.3 2.36.911.523.0 .72.13.57 1/31 1/22 1/44 1/2 .1.3.71.4 1/21 1/23 1/27 1/2 Ammonium Sulfate Superphosphate(19oz./pt.) 1003005001000 .2.71.22.3 2.36.911.523.0 .61.836 1/2248 .1.3.61.2 1/21 1/436 Nitrate of Soda Ground Limestone(23oz./pt.) 10030050010002000* .2.71.22.34.6 2.36.911.523.046.0 .51.52.5510 1/311 1/236 1/2 .1.3.512 1/21 1/82 1/2510

* Higher rates given for limestone.

 Table 3. Approximate Volumes of Fertilizer for a Given Volume of Soil Fertilizer Materials Rate Per AcreLbs. Volumes of Fertilizer for These Volumes of Soil Per Cubic Yard Per Cubic Foot or7 1/2 gal. 5 gallons 1 gallon Tablespoons Cups Teaspoons Tablespoons Teaspoons Teaspoons Mixed Fertilizers or Potassium chloride or Ammonium phosphate 1003005001000 4122040 1/43/41 1/42 1/2 1/21 1/32 1/44 1/2 3/41 1/2 1/311 2/33 1/4 1/33/5 Ammonium Nitrate or Urea 1003005001000 5152550 1/311 1/23 1/8 2/31 1/22 3/45 1/2 1/27/81 3/4 1/213/424 2/54/5 Ammonium Sulfate or Superphosphate 1003005001000 3 1/31016 3/433 2/3 1/55/812 2/51 1/523 3/4 2/31 1/4 1/43/41 1/42 3/4 1/51/2 Nitrate of Soda or Ground LImestone 1003005001000 2000 2 3/48 1/2142856 1/27/81 3/43 1/2 1/311 1/236 1/31/212 1/53/41 1/52 1/54 1/2 1/41/21 Sulfur or Cottonseed Meal 1003005001000 6 1/219 3264 1/31 1/424 4/523 2/37 1/3 2/31 1/42 1/3 1/21 1/22 2/35 1/5 1/21
2/28/2006 3:29:00 AM