By GLC Minerals

PRODUCT: UltraMag™

TYPE: Natural Dolomitic Lime

BEST SOIL: Soils needing Magnesium and increased pH. 


BENEFIT: High neutralizer, up to 4.5 times slower release, bulk powder, cost-effective


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Benefits oUltraMag: Greater Yields + Greater ROI 

Greater Yield

GLC Minerals’ UltraMag™ is a custom-processed dolomitic aglime from a natural source. This naturally occurring mineral is ground to a fine powder to make it more effective than dolomitic aglime. It also has a higher acid neutralizing potential than calcitic lime (thus giving it a higher Calcium Carbonate Equivalent). In addition, the soil reaction rate of dolomitic limestone is known to be 2.5 to 4.5 times slower than calcitic lime.

Because UltraMag is slower reacting than calcitic lime, UltraMag is the perfect choice to increase pH, protect humus and supply Mg on lighter soils like sandy loams, sandy soils, forest soils and pastures. GLC Minerals’ UltraMag is the perfect choice to efficiently and effectively increase soil pH in the central sands of Wisconsin and protect crops from herbicide injury that is often associated with over-liming when using calcitic aglime.

Greater ROI

Because UltraMag™ is a bulk powder product, it’s more cost effective than pelletized products. The pelletizing process adds considerable cost to the product without any improved effectiveness. In fact, purchasing pelletized products may make soil correction cost prohibitive.

For optimum yields, effective liming material must raise the soil pH to a desired level. UltraMag custom processed lime from GLC Minerals does just that, with the smallest amount of material applied possible. In contrast, aglime must be applied farther in advance and at much higher rates per acre than UltraMag. In some cases, poor quality aglime may not increase soil pH to the desired level.

UltraMag™ FAQ

What is the difference in UltraCal™ and UltraMag™? 

UltraCal™ is a high calcium lime that is low in magnesium. It is a perfect fit for heavier soils and for corn silage and alfalfa. UltraMag is a dolomitic lime that is high in magnesium. It is perfect for lighter soils, extremely low pH soils and potatoes. 

How is UltraMag™ better than Aglime? 

UltraMag™ will change pH more effectively than aglime because lime from GLC Minerals is purer and processed to a fine powder.  

How is this UltraMag™ better than pel-lime? 

UltraMag™ are purer and processed to a finer powder, than some pel-lime products. We do add a small amount of moisture to ensure it spreads well. Since there is no costly pelletizing, our products save growers a lot of money while enjoying increased yields. 

Start Your Order Today!

Complete the form below, call us at 1-800-236-7737, or email orders@glcminerals.com to get started on your order. Please note: We primarily service the Midwest region.