Round Up ????

Thanks

I will use the procedure for a 20 inch nozzle spacing.
Fill your tank 1/2 full of water.
Set your throttle and select the gear you will be using in the field while spraying.
Measure out 204 feet.
Twenty five feet behind the starting mark, select the gear and set the throttle.
When you cross the "starting line" start your stop watch and stop the watch at the end.
Do this three times and average the result.
Select the pressure you will be using while spraying.
With the sprayer stationary (and spraying) collect the output of one nozzle for the number of seconds that it took to travel the 204 feet.
Ounces collected equals gallons per acre. (The length of your boom or the number of nozzles do not figure into your calculation for gallons per acre, only the output of ONE nozzle is used.) Collect from each nozzle (for the number of seconds) and compare the ounces. A nozzle should not vary more than 5% by volume when compared to the others.

Let's say you collected 13 oz and have a 200 gal tank. You will be putting on 13 gals per acre so 200/13 equals 15.4. One tank will do 15.4 acres.
How much roundup to put in the tank? 15.4 quarts if you are doing 1 qt per acre. A gallon has 128 ounces in it so your rate will be 32 oz per acre.

To do a reverse calculation where you will be needing less than one tank full: Example, 10 acres.
10 times 13 gals per acre means you will need 130 gals of spray mixture in the tank. (Water, roundup and AMS) Roundup, 10 quarts, AMS 1.3 gallons (if using liquid AMS)

I do 27 oz per acre with one gallon of liquid AMS per 100 gallons of tank capacity.

Glysophate becomes inactive when it binds up with clay particles. So have clean water, not like some used to do & sump pump it out of the pond.

It will also bind up in hard water, so typically 2-4# per acre of that souluable N fertilizer is added - called AMS.

If you calibrated your rig, you should have the 'amount' questions answered. Your ground speed, spray tips, and pump pressure (25-40 lbs, if you get higher it makes a mist & causes drift.....) will all afect your application rate, so we really can't help you.

When you calibrated, you woulds sprayed an acre or 5 of known area & see how much clear water was used. That will tell you how much you are putting down per acre, and then do the math from there.

If you apply 10 gal per acre, your 325 gallon tank would use 32.5 quarts of RU, a bag & 1/2 of AMS (or 60 lbs about), and I like to throw in a little crop oil as well (gal per 100 gal or so), tho most glyphosate is sold with some in already.

If you apply 15 gal per acre, you would want 22 quarts of RU, a bag of AMS.

Going to depend on the results of your calibration test.

--->Paul

I find the average carrier rate is about 10 gallons per acre. I started out this year at 8 gallons per acre but the tractor ride was too rough because that needed 10 mph with my tractor and went back to 10 gallons per acre.

You need a couple pounds of AMS per acre in the water to tie up hardness ions in the water that would deactivate glyphosate. AMS also makes some weeds take up the glyphosate better. You may need a squirt of an antifoam and you need to mix thoroughly.

You have to spend time in the TeeJet catalog picking nozzles and ground speed as well as pressure to set the rate.

I got a complete burndown on my RR corn with 10 gallons of water, 2.5 pounds of AMS, and 32 ounces of Glystar plus. That is where I could drive. Some of the burndown was done much later with knee high weeds. I drove slower and so gave them more than 32 ounces to the acre and got a clean fast weed kill.

I you spray 10 gallons to the acre you have a mix for 32.5 acres and that will take 8 gallons of a standard quart per acre glyphosate after you mix in about 75 pounds of dry AMS.

The label allows water rates from 3 to 15 gallons per acre. My big time farming neighbors use 8 to 15 gallons per acre. I like Air Injected Turbo TeeJets. They make drops that don't drift.

Gerald J.

gallons sprayed per acre x acres = water you'll need.

Sounds like this is new to you - you might want to spray an unused acre with water just to make sure it's calabrated correctly.

pressure and speed need to remain constant or you'll over or under apply.

Or, what rate is recomended by the chemical dealer and/or Extension Agent for your area?

Once you know this, you can combine the chemical and water rates, to get the mixture "right", and be sure your sparyer can be calibrated for that rate, with the pressure and nozzles you have available.