Epsom Salt, Animal Feed & Agricultural Use

Magnesium sulfate (or Epsom salt) is used to correct magnesium deficiency which can be common in the hydroponic production of vegetable crops. It is perfect for use as a part of a hydroponic nutrient solution because it is an inexpensive, highly soluble and naturally occurring.

This agricultural-grade magnesium sulfate heptahydrate is an extremely soluble and bioavailable source of magnesium and sulfur for the health of animals and plants.

For Plants:

• Contains essential plant nutrients: Magnesium and Sulfur
• Optimum solubility needed to make true clear solutions and compatible with other soluble nutrients
• Ideal source for all Fertigation Systems: center pivot, micro-jet, drip-trickle and foliar spray applications
• Magnesium is critical as a central element in the chlorophyll molecule to capture energy from the sun and convert it to plant sugars via photosynthesis
•  Magnesium is especially required in sandy soils, soils with low CEC, for crops with high Mg demand and in situations of high applications of ammonium-N and/or Potassium

Crop                                     Yield Level                          LBS MG taken up

Alfalfa                                    10 tons                                                53

Bermudagrass                      10 tons                                                 50

Corn                                      200 bu                                                 53

Cotton                                   1500 lbs                                               35

Potatoes                                25 tons                                                50

Rice                                      7000 lbs                                               14

Soybeans                              60 bu                                                   27

Onions                                  30 tons                                                 37

Tomatoes                             40 tons                                                  36

Wheat                                  80 bu                                                     24

For Animals:

• Contains macro-nutrient Magnesium and secondary nutrient Sulfur
• Excellent solubility means greater animal bio-availability than other Mg sources
• Effective Mg for the prevention and treatment of hypomagnesaemia and grass tetany; especially in early lactating dairy cows
• Effective Mg nutrition in non-ruminant feeds; also used for enhanced mobility, reduced discomfort and a beneficial calming effect
• Magnesium is an important co-factor in enzymatic reactions vital to every metabolic pathway in every animal species

Mg Source                                       Mg Content                        Relative Biological Value*

Mag-sulfate                                        100g/kg                                               96%

Mag-Chloride                                     120 g/kg                                              89%

Mag-phosphate                                  260 g/kg                                              86%

Mag-oxide powder                             510 g/kg                                              84%

Mag-oxide granular                            510 g/kg                                              61%

*Feed Ingredients News, Sept. 2004

Chemical Properties:

• Chemical Name: Magnesium Sulfate Heptahydrate
• Formula: MgSO4•7H2O
• GRAS-Generally Regarded As Safe

Guaranteed Analysis:

• Magnesium (MG): 9.8% (min.), 9.8% water soluble magnesium
• Sulfur (S): 12.9% (min)

Variable Solubility Data table:

• Saturated Solution with 70°F water = 5.5% Mg
• Saturated Solution with 60°F water = 4.7% Mg

% Mg Solution**             1 Gallon Water (70°)       Amount Magnesium Sulfate Hepta.

5% Mg                                  1 Gallon (8.33 lbs)                            8.5 lbs

4% Mg                                  1 Gallon (8.33 lbs)                            5.7 lbs

3% Mg                                  1 Gallon (8.33 lbs)                            3.6 lbs

2% Mg                                  1 Gallon (8.33 lbs)                            2.1lbs

*These mixing amounts based on mixing of water and magnesium sulfate hepta. Only; additional inputs in solution will lessen the amount of mag-sulfate that can be added to make a saturated solution and lessen its Mg concentration.

** At any solution concentration of Mg there is 1.3 times as much Sulfur (S) in solution.