Adding more AMS than called for to neutralize the effects of cations may improve glyphosate activity by providing extra N that helps weak acid herbicides like glyphosate pass through cell membranes. It depends on how much you currently use to fertilize them, the dosage per gallon of water. Agitate the tank water while slowly adding the ammonium sulfate.  It is highly likely that AMS rates can be reduced to the lower end of the recommended rate and herbicide activity will not be compromised. As an example, Ammonium Sulfate contains approximately 20 percent Nitrogen. Research Institution. Volumes of Fertilizer for These Volumes of Soil. Rinse a second time in a bath of room temperature water. The equation listed above can be used to calculate the amount of sulfate in AMS that is needed to overcome antagonistic minerals in the spray water.  Some water in this region may have low mineral content and when using the equation only a small amount of AMS will be calculated to nullify the hard water.  However, in this era of low commodity prices and pressure on farmers to reduce input expenses, there may be an opportunity to reduce the amount of AMS applied and not compromise herbicide activity. Additional Ammonium sulfate is needed only under extremely hard water conditions. How reliable is this formula? Is there a minimum amount of AMS recommended that we should be using? It seem like the growers are putting a lot of faith in this equation and I want to make sure that it works. Can you add ammonium sulfate (AS) to Roundup? References 1 gallon. Any opinions, findings, conclusions, or recommendations expressed are those of the website author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture. How much ammonium sulfate to use. First reaction: sulfate (from AMS) will bind with cationic minerals in the spray water to form Ca-sulfate, Mg-sulfate, Fe-sulfate, etc. Figure 5. Figure 2.  Since AMS has typically been a low cost spray water conditioner, the additional amount added to a spray tank has not been viewed as a major expense. This ammonium-herbicide molecule can more effectively pass through the cuticle resulting in greater absorption and greater herbicide efficacy. This breaks down to approx 3.2 oz per gallon of water. Water quality must be known to adjust AMS rate. ND water often contains a combination of sodium, calcium, magnesium, and iron and these cations are generally additive in the antagonism of herbicides. Ammonium Thiosulfate (ATS) as an Ammonium Sulfate (AMS) Replacement (06/01/17) He normally uses 8.5 lbs. Mixed Fertilizers or Potassium chloride or Ammonium phosphate. (3.34 divided by 0.21 = 15.9 ounces or one pound). Second reaction: ammonium (from AMS) binds with glyphosate to form glyphosate-ammonium. AS to a 100 gallon spray tank. Using 25 lbs of 21-0-0 Ammonium Sulfate would put you @ just over a tenth of a lb. Yes, the label allows you to add up to 17 lb. Enjoy, Pete D. Rate Per Acre Lbs. Growers using the equation and adding AMS only at 0.5 lbs/100 gal may overcome herbicide antagonism from low mineral content in water but the low amount of AMS will not provide sufficient ammonium to optimize herbicide activity – the 0.5 lbs of AMS may have enough sulfate to bind minerals but it does not contain enough ammonium to enhance the herbicide. Apply 1 ounce ammonium sulfate per blueberry bush three times in the first year, rising to 4 ounces in the fourth year. Teaspoons. West Lafayette, IN 47907, An equal access/equal opportunity university. This gives us the amount of ammonium sulfate needs to be added to every 5 gallons of glyphosate spray. Mineral level in water increases to over 1,600 ppm in western ND. Figure 4. "The amount of AMS can be adjusted based on water hardness if it is known, and a rate of 8 pounds per 100 gallons may be adequate for many sources of water." Tall fescue (Festuca arundinacea), a cool-season grass hardy in USDA zones 4 through 7, also requires 2 to 4 pounds per 1,000 square feet per year, but cool-season grasses are fertilized in midspring, early summer, late summer and late fall. When using high glyphosate rates the requirement for AMS diminishes and complete control may occur on susceptible weeds if AMS is used or not used. 901 W. State St. The product label for Drexel AMS Supreme states: 2.5 gallons of this product per 100 gallons of spray solution (2.5% v/v) will provide 8.5 pounds of dry ammonium sulfate equivalent plus the optimum level (8 ounces) of HPG polymer technology. Question: Several of my growers have been using the formula listed in section #11 on page 72 in the 2015 ND Weed Control Guide to assess their water quality and AMS requirements:  lbs AMS/100 gal = (0.002 X ppm K) + (0.005 X ppm Na) + (0.009 X ppm Ca) + (0.014 X ppm Mg) + (0.042 X ppm Fe). Department of Entomology Adding ammonium sulfate (AMS) to the water in the spray tank before adding glyphosate will act as a water conditioner and improve weed control, regardless of whether or not a surfactant is needed. Effect of Ammonium Sulfate (AMS) on velvetleaf control with glyphosate in the field. ft.) every 14 days throughout the growing season. If you have trouble accessing this page because of a disability, please contact Pest&Crop newsletter at luck@purdue.edu. Last thought – A great scientist (Dr. John Nalewaja) once said the following, “The best adjuvant for Roundup is more Roundup”. + (0.042 X ppm Fe). ft. LIQUID AMMONIUM SULFATE 40% SOLUTION DESCRIPTION Liquid Ammonium Sulfate (LAS) is a clear to pale yellow odorless liquid solution. Purdue University Tablespoons. This application shall provide 0.09 - 0.12 lb. Add 16 ounces of lesco spreader sticker to the mix LAST, after fert is dissolved and Herb has beed added. Tanning with Aluminum Sulfate. This is the reason why herbicide labels typically contain statements that indicate that rates of AMS, 8 ½ to 17 pounds of AMS per hundred gallons of water, … The value of AMS will be clearly evident not only when spray water contains antagonistic levels of minerals, but also on those weeds that are less susceptible, weeds larger than recommended, weeds hardened by drought, weeds stressed by environment or previous herbicide applications, or when using herbicide rates that are lower than required for complete kill. It occurs in crystals with particle size that is variable, colored white to beige (IPNI 2012). If you have an eight ounce cup handy, you would need to add two of these, full to the top, to the 5 gallons of spray. of actual nitrogen per 1,000 sq. Ammonium sulfate has also been used in flame retardant compositions acting much like diammonium phosphate. Yes No Per Cubic Yard. of Ammonium Thiosulfatewith 1 - 2 gallons of water per 1,000 sq. Teaspoons. What is the application rate for Ammonium Sulfate to dissolve in water (foliar application)? So for example, you can not dissolve 78 grams of ammonium sulfate in 100 milliLiters of 80 degree water and then cool it to 60 degreees with out 5 grams of amonium sulfate precipitating out of solution, because the max solubility of ammonium sulfate at 60 degrees is only 73 grams per 100 milliLiter. This does two things. It is from this research and also from an extensive water quality testing campaign conducted by Winfield with thousands of water samples tested across the U.S that we have concluded with a general recommendation to “Always add AMS at 4 to 6 lbs/100 gal of water”. You could either spray the leaves with Ammonium Sulfate solution or just water the plant. **Important point: Even in water with no or low antagonistic cationic salt content where no sulfate is needed, a generous amount of ammonium is required to form ammonium-herbicide for optimum herbicide activity. We recommend dissolving 1 to 3 tablespoons per gallon of water. When dyeing with Washfast Acid Dyes, use one teaspoon of ammonium sulfate per gallon of dyebath (5 ml per 4 liters). Is additional Ammonium sulfate needed when using AMS-Supreme ™? All weak-acid herbicides are enhanced by ammonium. Allow enough time for complete dissolution before adding additional adjuvants or herbicides. Effect of Ammonium Sulfate (AMS) on velvetleaf control with glyphosate in the greenhouse. Was this answer helpful to you?  This is the reason why herbicide labels typically contain statements that indicate that rates of AMS, 8 ½ to 17 pounds of AMS per hundred gallons of water, are recommended on many glyphosate labels. The 0.5 lb of AMS is much less than the 8.5 to 17 lbs/100 gallons of water that is recommended on the Roundup labels. GPM = gallons per minute (water flow to which ammonia is being added) mg/l = ammonia dosage in milligrams of ammonia per liter (ammonia as NH4 + or NH 3) #/gal = pounds of ammonium sulfate per gallon (ammonium sulfate solution) 1.9 is a conversion factor 1,000 is a conversion factor To supply 4 pounds of nitrogen per year, apply 2/3 pound ammonium sulfate at each application. After antagonistic minerals are neutralized by the sulfate then the ammonium can bind with most postemergence herbicides and form the optimum ammonium-herbicide salt (glyphosate-NH4, dicamba-NH4, Poast-NH4, 2,4-D-NH4, etc.).  However, we would advise that it will be important to understand your water hardness test levels before severely reducing AMS rates. Most growers (should) use full glyphosate rates to delay resistance in weeds. Per Cubic Foot or 7 1/2 gal. First, the sulfate ions tie up calcium and magnesium in the mix water. Water quality in the mid-west and west is notoriously bad. Spread it around the bush then water it in thoroughly. Typical water levels on sprayers is 10-20 gallons per acre. Keep bypass agitation on if you sit idle mid job. A simple formula was developed by weed scientists at North Dakota State University to show the minimum amount of AMS needed to overcome hard water antagonism.  Since we know which hard water cations are most problematic (K, Na, Ca, Mg, Fe), it is fairly easy to calculate the amount of ammonium sulfate needed to condition the water to reduce the negative implications of hard water antagonism. Remove the hide from the neutralizer and rinse in clean water. For every gallon of water add 1 lb of Aluminum Sulfate. A recipe posted in the DyersLIST mailing list in 1998 by Don Weiner, formerly of PRO Chemical & Dye, calls for 13.6 grams of ammonium sulfate per pound of yarn in 2.5 gallons of water. Glyphosate molecules in hard water. It is not practical to calculate the amount of Ca on weed leaf surfaces and will require increasing the amount of AMS needed just for that mineral source. However, analysis of water across the U.S. shows AMS rates of 4 to 6 lbs/100 gal are adequate to overcome most hard water.” We recommend the 4 to 6 lb rate of AMS – See Long Answer. Mix 1/4 cup of aluminum sulfate into 1 gallon of water in a watering can to create a soil drench for an already established plant, like a hydrangea, that needs a lower pH. Always read and follow the label instructions on … MSU recommends adding 17 pounds of ammonium sulfate to the spray water before the glyphosate is added. LAS is a stable, non-hazardous, non-toxic aqueous ammonium sulfate solution manufactured at 40% by weight ammonium sulfate (NH 4) 2 SO 4. AMS-Supreme ™ contains 3.4 pounds of Ammonium sulfate per gallon. If you know the dosage / gallon multiply by 40 to get the amount or dose needed to create 16 oz of the Liquafeed concentrate. Effect of hard water cations on herbicide efficacy of weak acid herbicides. Is additional Ammonium sulfate needed when using AMS-Xtra ™? + (0.009 X ppm Ca)  Many plants, such as velvetleaf (Figures 4 and 5), contain Ca on the leaf surface, and additional sulfate is needed to overcome the antagonism which can occur after the spray solution leaves the nozzle.  It is difficult to calculate the amount of ammonium sulfate needed to overcome Ca on the leaf surface. Figure 3. Our good spray water quality has resulted in many cutting out or only using AMS at 0.5 lb/100 gallons of water for a water conditioner for Roundup. If not read the label, and apply the recommended amount, this can range from 4.25- 17 lbs of AMS/100 gallons. Section #11 on page 72 contains another important fact: “The formula does not account for cationic minerals (Ca) on leaf surfaces (lambsquarters, sunflower, velvetleaf, others) that can antagonize glyphosate.” Some plants contain Ca on the leaf surface and additional sulfate is needed to nullify that mineral source. Hang and drain for 30 minutes. Water in ND, SD, and MT is often high in sodium bicarbonate which does not normally occur in other areas of the U.S. Calcium levels above 150 ppm and sodium bicarbonate levels above 300 ppm in spray water can reduce weed control in all situations. First, we would like to review the reasons for using ammonium sulfate with postemergence herbicide treatments. Ammonium sulfate is purchased in 2 pound bags and mixed at only 0.2 pounds per gallon of feed soluion. The answer will be the ppm of the element per oz of the fertilizer in 100 gal of water. For example, if your material is ammonium sulfate and the recommended rate is 500 pounds per acre, use 1.2 pounds or 1 pint of fertilizer for a 100-foot area, use 3 … Rechlorinaion and ammonia addiion are only needed in this system the summer and early fall months. © 2020 Purdue University | An equal access/equal opportunity university | Copyright Complaints | Maintained by Pest&Crop newsletter. Only a small amount of ammonium sulfate is added to the herbicide - 8 to 20 pounds per 100 gal-lons of water. This site is supported in part by the Crop Protection and Pest Management Program [grant no. Land Grant. So if you have access to information about the salts in your water you can add the correct amount of AMS. AMS is available as a dry material, and also as a liquid. Figure 1. So you are legally allowed, but should you? 4 12 20 40 . Question: Several of my growers have been using the formula listed in section #11 on page 72 in the 2015 ND Weed Control Guide to assess their water quality and AMS requirements: Feel free to use and share this content, but please do so under the conditions of our, Equation Used to Calculate Rate of AMS (07/02/15), NDSU Crop & Pest Report - September 24, 2020, NDSU Crop & Pest Report - September 10, 2020, NDSU Crop & Pest Report - August 27, 2020, NDSU Crop & Pest Report - August 13, 2020. I know it's recommended you put the AMS in first at 17 and a half pounds per hundred gallons of water and I am looking for some advice. The label also correctly warns that adding AS does not preclude you from using the proper surfactant. Always read and follow the label instructions on the product container(s) before using. pppldj uses 1 Tbsp per 2-1/2 gallons of water Additional Ammonium sulfate is needed only under extremely hard water conditions. + (0.014 X ppm Mg) 1/4 3/4 1 1/4 2 1/2.  Sometimes we call this process chelating and it is well known that glyphosate can chelate Ca2+ ions, and that calcium can tie up multiple glyphosate molecules (Figure 1).  To correct this problem, when you add AMS (NH4)2SO4 to the tank, the ammonium (NH4+) disassociates from the sulfate (SO4-2) and the sulfate preferentially binds to the positively charged hard water cations.  Because of lower commodity prices and grower interest in keeping input expenses as low as possible, I thought it would be a good time to review this topic and the AMS equation to help applicators and farmers plan for spring and summer herbicide applications. with 44 - 88 gallons of water per Acre (9.0 - 12.0 oz. Our good spray water quality has resulted in many cutting out or only using AMS at 0.5 lb/100 gallons of water for a water conditioner for Roundup. The 0.5 lb of AMS is much less than the 8.5 to 17 lbs/100 gallons of water that is recommended on the Roundup labels. 5 gallons . of actual N per 1000. The equation in section #11 does not address the amount of ammonium in AMS needed to enhance/optimize the herbicide. Cups. It is important to remember that the function of ammonium is just as important as role of sulfate. Water conditioning trials have been conducted at NDSU for well over 30 years and researchers have repeatedly found that AMS is the most economical and effective water conditioner for glyphosate and many other herbicides. Use it at the rate of between 8 ½ and 17 lb. The minimum amount of AMS needed to tie up hard water cations is calculated with this formula: lbs AMS/100 gal =  (0.002 X ppm K) Dissolve 1-3 tablespoons of Greenway Biotech Ammonium Sulfate fertilizer per one gallon of water. 20 percent multiplied by 75 is 15, which is the ppm of Nitrogen in 1 oz of Ammonium Sulfate per 100 gal of water. We have received a few questions this winter and spring about ammonium sulfate (AMS) rates to use with postemergence herbicides and how much is needed to overcome hard water issues.  Additionally, after antagonistic minerals are neutralized by the sulfate, the ammonium can bind with the herbicide to form the ammonium herbicide salt, which can more effectively pass through the plant cuticle resulting in greater herbicide absorption, in some cases increased herbicide translocation, and overall greater herbicide efficacy.  This ‘physiological’ effect of AMS enhancing foliar herbicide activity even in the absence of hard water is important to keep in mind when considering adjuvant products that contain less ammonium, yet claim to be a replacement for AMS. I started out the year using an AMS substitute called rRequest and a while back after reading a study on them I saw that spray grade granular ammonium sulfate by far gets the best kill with Roundup. Glyphosate molecules in hard water plus Ammonium Sulfate (AMS). The addition of 8.5 to 17 pounds of AMS per 100 gallons of water is generally recommended to improve glyphosate activity. Short Answer: The information on page 72 in the 2015 ND Weed Control Guide does recommend using the equation listed above to calculate the amount the AMS need to condition spray water but there is additional information which is equally important, “Glyphosate labels suggest AMS at 8.5 to 17 lb/100 gallons of water. per 100 gallons of water. Fortunately AMS is VERY CHEAP, so this shouldn’t inhibit its use. Tablespoons. 100 300 500 1000 . AMS per 100 gallons of water as a water conditioner. Use only a “spray grade” ammonium sulfate product. 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