Injection can be defined as the application of manure through method. Disk injector is an equipment which incorporates manure into the soil through physical means without a separate tillage operation. In direct incorporation method, discs are used for manure injection. They mix and cover the injected manure with the surface soil layer. The rolling motion of a disc helps to cut through the soil surface, and at the same time, tends to compact the soil and reduces pore size, thus decreasing the infiltration rate. Disk injectors are used to reduce crop damage. Manure is an excellent source of nutrient and organic matter for use in crop production and also to improve the soil structure and water holding capacity of an agricultural field. However, surface application of manure is a major environmental concern because it causes nutrition loss by volatilization of ammonia and odor emissions. Soil injection of manure is increasingly being used to mitigate odor and ammonia (NH3) emissions; howe...