Showing posts from March, 2021
The region where the soil and roots make contact is called rhizosphere . The microbial population of rhizosphere is much higher than that of root free soil. Bacterial growth in rhizosphere is enhanced by nutritional substance like vitamins, amino-aci…
The microorganisms that inhabit soil exhibit many different types of association or interaction. Types of Microbial Interactions There are three types of Microbial Interactions, found in soil. 1. Positive interaction : - Mutualism - Commen…
Biofertilizers are defined as " biologically active products or microbial inoculants which help plant's growth." When plant nutrients are available in abundance the soil is said to be fertile. Microorganisms have a great role in inc…
All organisms possess cellular organization and made up of one or more cells. The cellular structure is essential in performing various life processes. Each cell can be considered as the structural and functional unit of life. All cells possess s…
Microbial control by Physical Methods & Agents A variety of physical agents and methods can be used for microbial control. Of these, high temperature, radiation and filtration are the agents of choice for achieving sterilization of the objects …
Control of micro-organisms means reduction in the number and/or activity of micro-organisms. The main objectives behind the microbial control include : 1. Prevention of occurrence and transmission of diseases and infection. 2. Prevention of cotamina…
The death of microorganisms, due to the effect of antimicrobials, always occur in a logarithmic manner. An antimicrobtal agent causes death of micro-organisms by killing a specific proportion of organisms present in the object under a given set of c…
