The secondary nutrients such as Calcium,Magnesium,Sulphur are important nutrient next to nitrogen ,phosphorous and potassium. For most crops,these three nutrients are needed in higher amount than micro nutrients.They are higher amount than a micro nutrients .They are growing in importance in crop fertilization programs.Of the there secondary nutrient needed at lower levels than NPK,Calcium (Ca) perhaps the most important .calcium Strengthen cell walls,helping to reduce bruising and disease in fruit ,salad and vegetable crops.This mean that are less prone to damage and have a longer shelf life.Crops short in calcium will have growth disorders such as corky skin.Fruit and Vegetables containin higher level of calcium also have higher nutritional value for example,vitamin and antioxidants n tomatoes.This means that eating fresh fruit with strong skin and a great,Crisp bite will help provide us with the calcium we need for strang bones.
Magnesium (Mg) is also important for crop quality ,but is also a key component of leaf chlorophyll and the enzymes that support plant growth.Low magnesium lead to reduced photosynthesis,which severely limits crop yields.
Grain fill in rice and dry matter content of potatoes can be siginificantly reduced if magnesium is under supplied.
Sulphur (S) is an essential part of many amino acid and proteins .Without both S and Mg,crops suffer;growth slows and leaves turn pale or yellow.Sulphur is particularly important for ensuring the protein content of cereal crop grains.
Role of secondary nutrients on plant sulphur Growth
Calcium
• Utilized for continuous cell division and formation
• Strengthen the whole plant.
• Reduces soil acidity.
• Involved in nitrogen metabolism and reduces nitrogen leaching.
• Reduces plant respiration
• Aids translocation of photosyn-thesis from leaves to fruit organs
• Increase fruit set
• Essential for nut development in peanuts
• Stimulates microbial activity

Magnesium
• Key element of chlorophyll production
• Improves utilization and mobility of phosphorous
• Activator and component of many plant enzymes
• Increases iron utilization in plants
• Influences earliness and uniformity of maturity
Sulphur
• Integral part amino acids
• Helps develop enzymes and vitamins
• Promotes nodules formation on legumes
• Acid in seed production
• Necessary in cholorophyll formation
Benefits
• Helps in maintain the soil fertility
• Neutralize soil acidity
• Prevent die back leaves,stem and roots
• Prevents intervienal cholorosis
• Acts as a signaling agent in plant cell and as fungicide
Guaranteed Minium Analysis
• Calcium-5.00%
• Magnesium -5.00%
• Sulphur-5.00%
• Neutralizing Value-80.8%
Fitness
• Passes 10 mesh screen………99.9%
• Passes 100 mesh screen…..60.00%