Constant use of the soil leads to the loss of its important nutrients particularly nitrogen, phosphorus and potassium and thus the soil loses its fertility. for the healthy growth of the plant these deficiencies in the soil have to be replenished with the use of certain materials called fertilizers. These can be classified under two groups. Manures Manures are organic materials added to the soil...

Livestock Livestock refers to all domestic animals that are used to produce food and other valuable products for man. It includes cattle, buffaloes, sheep, goats and pigs. Livestock may be milk producing or meat providing. Milk Producing Livestock These are milch animals. the milk-producing animls reared in out country are cows, buffaloes, goats adn camels. Goat's milk is very nutritious. Goats...

Fungal diseases are called mycoses and those affecting humans can be divided into four groups based on the level of penetration into the body tissues: 1. Superficial mycoses are caused by fungi that grow only on the surface of the skin or hair. 2. Cutaneous mycoses or dermatomycoses include such infections as athlete's foot and ringworm, in which growth occurs only in the superficial layers of s...

Gram'+ Cocci: Staphylococci, including Toxic Shock Syndrome (TSS): The main pathogenic species is Staphylococcus aureus (aure = gold, golden), which causes most hospital-acquired infections. Multiple-drug-resistant strains have become a problem due to overuse of antibiotics Streptococci : Not all streptococci are bad: many are beneficial. Streptococcus thermophilus (thermo = heat; philia = bro...

A virus is a submicroscopic infectious particle composed of a protein coat and a nucleic acid core. Viruses are similar in size to a large protein macromolecule, generally smaller than 200 nm in diameter. Viruses, like cells, carry genetic information encoded in their nucleic acid, and can undergo mutations and reproduce; however, they cannot carry out metabolism, and thus are not considered alive...