Manures and fertilizers..
You will be wondering what exactly both of them are ? Why do we study about them?
What is the difference between manures and fertilizers ?
as generally its the question being asked in exams.
Don’t be panic here you will get complete knowledge regarding Manures and fertilizers..
So, here up we start!
The deficiency of plant nutrients and organic content in the soil is replenished by adding manure and fertilizers to the soil of crop-fields.
Both manures and fertilizers are major sources of nutrients of plants, that’s why they are used in crop production!
What is manure?
In simplified words, manures are natural fertilizers. Moreover they are bulky sources of organic matter which supply necessary nutrients in small quantities & organic matter in large quantities.
Manures are prepared by the decomposed animal excreta and plant waste.Manures include farmyard manure (FYM) , compost, green manures , vermi compost , etc.
let’s move a step ahead !
Advantages and disadvantages of manures
Yes manures have its own advantages and disadvantages which we are going to discuss now, first of all advantages of manure!
Advantages of manure
Manures affect the soil in following three ways:
- Manures enrich the soil with nutrients. They replenish the general deficiency of nutrients in the soil.Since manures contain less nutrients they need to be used in large quantities.
- Manures add organic matter (called humus) to the soil which restores the soil texture, for better retention of water and aeration of soil. For example , organic matter present in the manures increases the water holding capacity in sandy soils and drainage in clayey soil. They also prevent water logging in the clay soils.
- The organic matter in manures provides food for the soil organisms,( decomposers such as bacteria , fungi, etc.)which help in providing nutrients to plants.
Hence, organic manure helps to improve the physical properties of soil, reduces soil erosion, increases the moisture holding capacity of soil and is low cost nutrient carrier. One way of re-cycling the farm waste is using biological waste material. Manures also protect our environment from synthetic chemicals.
Disadvantages of manures
Manures have some disadvantages too.
- They are bulky with low nutrient content.
- The nutrients get released slowly, unable to fulfill the high and rapid demand of nutrients required by improved high yielding hybrid varieties of crops.
- Being voluminous and bulky, they are inconvenient to handle, store and transport.
- Moreover , manures are not nutrient specific and are not useful when a particular nutrient is required in the soil for a particular crop.
this is not the end.. tune to next page for the wonderful description!