Organic Fertilizer and It’s Uses in Agriculture

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What is Organic Fertilizer?
Organic fertilizers are fertilizers which derive from animal products and plant residues that contain sufficient nitrogen with other nutrients in the available form for plants. It supplies nutrients in small amount over an extended period of time as the plants need them.

Types of Organic Fertilizer:
Organic fertilizer can be categorized in different ways in different angels. But the most common classification is made on the basis of derived materials. Here are some of the most common types of organic fertilizers:

Animal Based Fertilizers
1. Animal Manure: It comes from variety of animals. As for example cow manure comes from cow dung which improves soil moisture holding capacity and increases air penetration capacity as well as control weeds. Seabird’s guano is a very good organic fertilizer which can control nematodes in soil and act as natural fungicide.
2. Bone Meal: It comes from crushed animal bones which is rich in calcium and phosphorus along with some nitrogen. It enhances plants growth and makes them stronger. It also helps plants seedling growth, increase flower and yield.
3. Blood Meal: It’s the dry form of animal blood. Its rich in nitrogen thus it improves the nitrogen content in soil and promotes flowering and makes plant denser. Acts as a natural pest repellant. But its excess use can burn the plants root.


Plant Based Fertilizers
1. Compost: It’s the natural recycling process of organic matter such as leaves and food scraps in to an available form of nutrients for plants. It works as a nutrient supplier and soil texture improver which helps soil to retain water and nutrients for long period.
2. Cottonseed Meal: It’s the crushed form of cotton seed rich in nitrogen along with small amount of phosphorus and potassium. Its mainly used to cover the garden soil for improving soil texture.
3. Seaweed: It’s a very fast decomposable fertilizer rich in zinc and iron. Helps retains soil water for longer period.


Mineral Fertilizers
1. Greensand: It’s an gluconite containing olive green sandstone. Its rich in iron, potassium and magnesium. It stimulates flowering and fruition. It improves the rhizosphere and water holding capacity of soil.
2. Rock phosphate: It’s the extracted from mineral rocks and clays. It contains over 30% phosphate and rich in micronutrients. It’s usually used to increase soil acidity and promote plant seedlings growth.




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