What formula should be used for calculating herbicide amounts when water volume is less than an acre foot?

The correct formula involves calculating the volume of water in a body when its dimensions are in feet, specifically when the volume is less than an acre foot. An acre foot refers to the volume of water that covers one acre of land to a depth of one foot, which is approximately 325,851 gallons.

Using the formula that multiplies the average length, average width, and average depth (all measured in feet) gives you the volume in cubic feet. This product is then multiplied by 62.4, which is the weight of one cubic foot of water in pounds. Dividing the resulting value by 1,000,000 converts the weight from pounds to millions of pounds, enabling the calculation to be easier for determining herbicide amounts. This is essential for water bodies that are less than one acre foot, as accurate treatment levels must be calculated to avoid over-application or under-application of herbicides, ensuring environmental safety and effectiveness.

The other formulas listed do not effectively address the specific condition of calculating herbicide amounts in small water volumes like those less than an acre foot. They may relate to different measurement conversions or applications, but they do not serve the same function as the correct formula for calculating water volume and herbicide rates in this