Service Forester's Handbook

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====== Herbicide or Pesticide Mixing Formulas ======
The following formulas may be helpful when mixing herbicides or pesticides: \\
1. The percent of active ingredient in a spray mixture: \\
{{::mixingformula1.jpg|}}
\\
2. The pounds of wettable powder needed to mix a spray containing a given percentage of 
active ingredient:\\ 
{{::mixingformula2.jpg|}}
\\
3. The gallons of concentrate needed to mix a spray containing a given percentage of active ingredient:\\
{{::mixingformula3.jpg|}}
\\
4. The pounds of concentrate to use to prepare a solution or suspension on a weight-to-weight basis:\\
{{::mixingformula4.jpg|}}

====Conversion Factors ====
Some conversion factors of importance in herbicide or pesticide mixing are:
===Measures===
|1 tablespoonful       |=|3 teaspoonfuls|
|2 tablespoonfuls      |=|1 fluid ounce |
|16 tablespoonfuls     |=|1 cup         |
|8 fluid ounces        |=|1 cup         |
|2 cups                |=|1 pint        |
|16 fluid ounces       |=|1 pint        |
|16 cups               |=|1 gallon      |
|128 fluid ounces      |=|1 gallon      |
|3785.3 ccs.           |=|1 gallon      |

===Weights===
1 gallon of pure water weighs 8.345 lbs.\\
1 gallon of Diesel oil weighs 7.0 lbs.\\
454 grams equals 1 lb.\\
1 ounce per square foot = approx. 2722.5 lb/acre\\
1 ounce per square yard = approx. 302.5 lb/acre\\
1 lb. per 100 square feet = 435.6 lb/acre\\
1 pint per square rod = 20 gal. per acre\\
1 gram per square feet = approx. 96 lb/acre\\

Service Forester's Handbook

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