K-Mag - The Premium Fertilizer
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Higher Yields are Available with K-Mag® Fertilizer

Why K-Mag?
The shortage of just one essential nutrient can shortchange vegetable yields and quality. Growers can optimize yields and maximize profits by providing a balanced soil fertility program that ensures all 17 essential nutrients are available to plants.

K-Mag fertilizer provides three essential nutrients in the highly available sulfate form. Available in PREMIUM, GRANULAR and STANDARD grades, K-Mag provides 21-22% potassium (K2O), 10.5-10.8% magnesium (Mg) and 21-22% sulfur (S).

Also known as langbeinite, potassium magnesium sulfate, or double sulfate of potash, K-Mag is sourced from ore beds deep beneath the earth's surface, where an isolated lake of ocean water once existed. Langbeinite, an evaporite mineral, is one of the most soluble salts in the ocean.

Increase vegetable yields
Progressive vegetable producers know that quality, in addition to quantity, is key to profit potential. Weight, color and aroma are subjective measures, but central in judging the merit and worth of a vegetable crop. Numerous field trials have shown that a balanced fertilization program that provides nutrition beyond NPK increases both the total and marketable yields of vegetables.

K-Mag supplies three essential nutrients, without affecting soil pH.

Potassium (K)
A high-yielding, high-quality vegetable crop requires large amounts of K (see chart below). K increases root growth and enhances a plant's ability to defend against disease and cold. K also promotes the formation and translocation of sugars, starches, and proteins that promote quality produce. In tomatoes, K additions can help prevent uneven ripening and irregularly shaped fruit, and improve color quality.

K2O removal by vegetables
Uptake Crop Yield (cwt/A) K2O (lb/A)
Lettuce 400 185
Potatoes 500 546
Table Beets 500 580
Tomatoes 600 336
Onions 600 160
Cabbage 700 249

Magnesium (Mg)
Increased K rates can inhibit Mg uptake by the plant. Without Mg, photosynthesis is inhibited, and plants may mature late, have a less-efficient root system and produce inferior fruit. In Mg-deficient vegetable plants, leaves can develop a loss of normal green color, and cease to function. Supplying adequate Mg, and in the proper balance with K, can greatly enhance vegetable yield and quality. A UC-Davis study found that managing K, and the ratio of K to Mg, helped reduce color disorders in tomatoes. K-Mag provides a readily available soluble source of Mg, and it supplies K and Mg in the proper balance.

Sulfur (S)
S helps build proteins in plants and is a key component of many unique vegetable traits. S puts the "green and leafy" traits into crops like spinach, while giving garlic and asparagus their distinctive flavors. Without adequate S, "hot" mustard or horseradish would not exist. And, in virtually every S deficiency situation, the appearance of the vegetables is somehow affected.

Ensure your vegetable crop has all the nutrients it needs to thrive. Contact us today to learn
about adding K-Mag to your balanced soil fertility program!

Nutrient Deficiencies in Vegetables


Crop Nutrient Utilization

Bell Peppers --------------------------------LB/A --------------------------------
Yield (Per Acre) N P2O5 K2O Mg S
180 CWT 137 52 217 43 30
 
Cabbage  --------------------------------LB/A --------------------------------
Yield (Per Acre) N P2O5 K2O Mg S
700 CWT 140 35 128 9 64
Stem & Leaf 130 28 121 27 -
Total 270 63 249 36 64

Corn  --------------------------------LB/A --------------------------------
Yield (Per Acre) N P2O5 K2O Mg S
150 BU 113 65 43 14 11
Stalks 87 20 157 35 14
Total 200 85 200 49 25
180 BU 135 78 51 16 14
Stalks 104 24 188 42 16
Total 239 102 239 58 30
200 BU 150 87 57 18 15
Stalks 116 27 209 47 18
Total 266 114 266 65 33

Cucumbers --------------------------------LB/A --------------------------------
Yield (Per Acre) N P2O5 K2O Mg S
10 TON Fruit 40 14 66 4 -
Vines 50 14 108 21 -
Total 90 28 174 25 30*
* Estimated S for harvested and vegetative portion of crop.
Peas --------------------------------LB/A --------------------------------
Yield (Per Acre) N P2O5 K2O Mg S
25 CWT 164 35 105 18 20

Peppers --------------------------------LB/A --------------------------------
Yield (Per Acre) N P2O5 K2O Mg S
9 TON 137 52 217 43 50

Snap Beans* --------------------------------LB/A --------------------------------
Yield (Per Acre) N P2O5 K2O Mg S
4 TON 70 21 77 8 -
Vines 68 12 86 9 -
Total 138 33 163 17 20**
* Legumes derive most of the N from Symbiotic N fixation
** Estimated S for harvested and vegetative portion of crop.

Sugar Beets --------------------------------LB/A --------------------------------
Yield (Per Acre) N P2O5 K2O Mg S
30 TON 255 40 550 80 45

Sweet Corn  --------------------------------LB/A --------------------------------
Yield (Per Acre) N P2O5 K2O Mg S
90 CWT w/Husk 80 22 52 6 5
Stover 60 25 84 14 6
Total 140 47 136 20 11

Table Beets --------------------------------LB/A --------------------------------
Yield (Per Acre) N P2O5 K2O Mg S
500 CWT 360 43 580 104 41

Tomatoes --------------------------------LB/A --------------------------------
Yield (Per Acre) N P2O5 K2O Mg S
600 CWT 108 50 216 15 23
Vines 66 15 131 20 20
Total 174 65 347 35 43

 
 
  Crop Specific Information
  Nutrient Management
  Soil Sampling Information
  Resources
  Agri-Brief PDF
  Deficiency Symptoms
  Crop Nutrient Utilization
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