1. In what natural ways are soil nitrates replaced?
2.What is retting?
3.What are antibiotics?
4. What are pathogens?
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1.Soil nitrates' are replaced by the “replenishment of soil” and with the help of “the rhizobium bacteria”.
2.Retting, process employing the action of bacteria and moisture on plants to dissolve or rot away much of the cellular tissues and gummy substances surrounding bast-fibre bundles, thus facilitating separation of the fibre from the stem. Basic methods include dew retting and water retting.
3.An antibiotic is a type of antimicrobial substance active against bacteria. It is the most important type of antibacterial agent for fighting bacterial infections, and antibiotic medications are widely used in the treatment and prevention of such infections. They may either kill or inhibit the growth of bacteria
4.In biology, a pathogen in the oldest and broadest sense, is any organism that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. The term pathogen came into use in the 1880s.
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