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NW Washington | If you use liquid fertilizers you can blend liquid Thio-sul, 12-0-0-26 with 28 or even 10-34-0 to get the sulfur you need. Just don't put it in the seed row.
Sulfur deficiencies may be showing up in the Midwest now due to clean air laws limiting sulfur emmisions into the air, especially by coal fired electric power plants. Sulfur is also banned from gasoline and diesel fuels for the same reason. Much improved yields also remove much more sulfur from the soil too. Sulfur fertilizers have been routinely used in the PNW for years.
"Macronutrients
Carbon
Carbon forms the backbone of many plants biomolecules, including starches and cellulose. Carbon is fixed through photosynthesis from the carbon dioxide in the air and is a part of the carbohydrates that store energy in the plant.
Hydrogen
Hydrogen also is necessary for building sugars and building the plant. It is obtained almost entirely from water.
Oxygen
Oxygen is necessary for cellular respiration. Cellular respiration is the process of generating energy-rich adenosine triphosphate (ATP) via the consumption of sugars made in photosynthesis. Oxygen gas is produced as a by-product from this reaction.
Phosphorus
Phosphorus is important in plant bioenergetics. As a component of ATP, phosphorus is needed for the conversion of light energy to chemical energy (ATP) during photosynthesis. Phosphorus can also be used to modify the activity of various enzymes by phosphorylation, and can be used for cell signalling. Since ATP can be used for the biosynthesis of many plant biomolecules, phosphorus is important for plant growth and flower/seed formation.
Potassium
Potassium regulates the opening and closing of the stomata by a potassium ion pump. Since stomata are important in water regulation, potassium reduces water loss from the leaves and increases drought tolerance. Potassium deficiency may cause necrosis or interveinal chlorosis.
Nitrogen
Nitrogen is an essential component of all proteins. Nitrogen deficiency most often results in stunted growth.
Sulphur
Sulphur is a structural component of some amino acids and vitamins, and is essential in the manufacturing of chloroplasts.
Calcium
Calcium regulates transport of other nutrients into the plant and is also involved in the activation of certain plant enzymes. Calcium deficiency results in stunting.
Magnesium
Magnesium is an important part of chlorophyll, a critical plant pigment important in photosynthesis. It is important in the production of ATP through its role as an enzyme cofactor. There are many other biological roles for magnesium-- see Magnesium in biological systems for more information. Magnesium deficiency can result in interveinal chlorosis.
Silicon
Silicon is deposited in cell walls and contributes to its mechanical properties
including rigidity and elasticity"
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Iowa Sulfur Trials, 2009
