You are here

Can you tell me about sprayer calibration?

1. For a broadcast boom - measure the distance between nozzles. Measure it, don't guess. For a band, either on a planter or on a cultivator, measure the width of the area sprayed (band).

Hooded Sprayer2. Determine the length, in feet, of a 1/128 acre plot for the measured nozzle spacing or band width. This will be the distance to time the tractor.

3. To do this use the following formula: 43,560 (square feet per acre) / divided by nozzle spacing or band width in feet / divided by 128. * Example - 19 inch band on a cultivator 19 / 12 = 1.583333 feet (band width in feet) 43,560 (sq.ft./ac) / 1.583333 = 27511.584 27511.584 / 128 (ounces in a gallon) = 214.934 (215) feet to time the tractor.

4. Determine the time in seconds for the tractor to travel 215 feet. (Remember to determine the time to travel the distance under the condition of operation, i.e. with the cultivator down, etc.)

Highboy5. With the pressure set and the sprayer spraying, catch water from all tips spraying the band (or one tip on a broadcast boom) for the exact same time it took to travel the prescribed distance and measure it in ounces. * Lets say it took 25 seconds and you caught 10 ounces. You are putting out 10 gallons of volume per treated acre.

6. Determine the tank capacity and divide by the volume per treated acre. * Example: 300 gallon tank capacity and 10 gallons per treated acre = 30 acre per tank load. This tells you that the sprayer will treat 30 acres. Don't worry about how many acres the tractor will drive over - it will treat 30 acres.

7. Determine the broadcast rate of the product, or products in question and add enough to the tank to treat 30 acres on a broadcast basis. The tractor will treat 30 treated acres and don't worry how many planted acres it runs over.

Printer Friendly and PDF

News

Green baby cotton plants poke through soil.
Filed Under: Crops, Cotton May 18, 2018

STARKVILLE, Miss. -- Growers may be on their way to planting more cotton in Mississippi soil than they have in 11 years, despite a late start.

Darrin Dodds, cotton specialist for the Mississippi State University Extension Service, estimated that growers will plant 700,000 acres of cotton this year. If that much gets harvested, it will be the best total since 2006, when the state produced 1.2 million acres of cotton. Last year, Mississippi cotton producers harvested 625,000 acres.

Filed Under: Commercial Fruit and Nuts, Green Industry, Organic Fruit and Vegetables, Other Vegetables, Corn, Cotton, Nuts, Peanuts, Soybeans, Equine, Goats and Sheep, Poultry, Lawn and Garden, Forestry, Seafood Economics, Seafood Harvesting and Processing March 7, 2018

ELLISVILLE, Miss. -- Mississippi State University representatives met with agricultural clients in Ellisville recently to discuss research and education needs for 2018. More than 115 individuals attended this year's event.

Filed Under: Cotton, Soybeans, Weed Control for Crops March 6, 2018

STARKVILLE, Miss. -- Two highly anticipated online training modules are now available for those who plan to purchase or apply dicamba and similar herbicides.

The Mississippi State University Extension Service, in cooperation with the Mississippi Department of Agriculture and Commerce Bureau of Plant Industry, developed these new online training courses related to herbicides labeled for use with dicamba-tolerant cotton and soybeans in response to label changes from the Environmental Protection Agency.

Filed Under: Cotton, Soybeans, Weed Control for Crops February 16, 2018

STARKVILLE, Miss. -- In response to new Environmental Protection Agency regulations on the use of the herbicide dicamba, the Mississippi State University Extension Service is developing two online training courses to help cotton and soybean farmers follow the new rules.

Picked cotton sits in large green and red bales.
Filed Under: Agricultural Economics, Corn, Cotton, Rice, Soybeans December 19, 2017

STARKVILLE, Miss. -- The 2017 production value of Mississippi’s four largest row crops is forecasted to outperform the previous year by more than 7 percent.

Brian Williams, agricultural economist with the Mississippi State University Extension Service, predicted the combined value of soybeans, cotton, corn and rice will be nearly $2.1 billion this year. The total projected value for all agronomic crops is $2.5 billion, which would be a 6.4 percent increase over the $2.4 billion value reached in 2016.

Watch

Farmweek, Entire Show, October 9, 2015
Farmweek

Season 39 Show #14

Thursday, October 8, 2015 - 7:00pm
Farmweek Entire Show,  September 4, 2015
Farmweek

Season 39 Show #09

Thursday, September 3, 2015 - 7:00pm

Contact Your County Office

Your Extension Experts

Assoc Extension/Research Prof
Cotton Agronomics