In order to maintain soil fertility , it is necessary to add containing nitrogen , phosphorous and potassium in the form of manures. Manures are two type they are a) Natural and b) Artificial , Artifical manures are chemical compounds obtained by artificial mean containing N,P or K. These chemical compounds are generally called fertilizers. The chemical substance which are added to the soil as to make up the deficiency of essential elements are called fertilizers. Every chemical compounds of N,P , & K can be used as fertilizer and it must have chracteristic properties. Fertilizers are classified according to the element (N,P or K) which they are supplied tothe soild. complete manure is that which supplies

In order to maintain soil fertility , it is necessary to add containin

1.	In order to maintain soil fertility , it is necessary to add containing nitrogen , phosphorous and potassium in the form of manures. Manures are two type they are a) Natural and b) Artificial , Artifical manures are chemical compounds obtained by artificial mean containing N,P or K. These chemical compounds are generally called fertilizers. The chemical substance which are added to the soil as to make up the deficiency of essential elements are called fertilizers. Every chemical compounds of N,P , & K can be used as fertilizer and it must have chracteristic properties. Fertilizers are classified according to the element (N,P or K) which they are supplied tothe soild. complete manure is that which supplies
Answer» <P>S,K and N S and N N,K and P S,N and P Solution :Manure is a SUBSTANCE which supplies N.P.K