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Biology

Testing of Soil: On-Farm Methods

Science > Biology > Soil Management > Testing of Soil on Farm Methods Need for Testing of Soil: To optimize crop production To protect the environment from contamination by runoff and leaching of excess fertilizers To aid in the diagnosis of plant culture problems To Know the exact nutrient found in the Soil To improve […]

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Biology

Soil Profile

Science > Biology > Soil Management > Soil Profile A vertical section through different layers of the soil is called the soil profile. Each layer differs in feel (texture), colour, depth, and chemical composition. These layers are called horizons. Soil texture depends on the size of individual soil particles and is determined by the relative proportions of particle sizes […]

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Biology

Soil and Its Types

Science > Biology > Soil Management > Soil and its Types Soil is one of the three major natural resources, alongside air and water required for sustenance of life.  It is the upper layer of earth in which plants grow, a black or dark brown material typically consisting of a mixture of organic remains, clay, […]

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Biology

Other Methods of Contraception

Science > Biology > Human Population and Population Control > Other Methods of Contraception In this article, we shall discuss the remaining methods of contraception. These methods are oral contraceptives, injectable contraceptives, medical termination of pregnancy. Oral Contraceptives: Oral contraceptives are medications that prevent pregnancy. They are hormonal preparations that may contain combinations of the […]

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Biology

Surgical Methods of Contraception

Science > Biology > Human Population and Population Control > Surgical Methods of Contraception Sterilization is a permanent method of birth control. Sterilization procedures for women are called tubal ligation or tubectomy or Hysterectomy in a rare case. The procedure for men is called vasectomy. Sterilization is considered a permanent and sure method of contraception. In certain cases, […]

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Biology

Intrauterine Devices (IUDs)

Science > Biology > Human Population and Population Control > Intrauterine Devices (IUDs) The Intrauterine Devices are ideal contraceptives for females. IUD is a tiny device that is put into the uterus by the health service provider to prevent pregnancy. It is long-term, reversible, and one of the most effective birth control methods available. These devices […]

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Biology

Barrier Methods of Contraception

Science > Biology > Human Population and Population Control > Barrier Methods of Contraception Barrier methods of contraception act as barriers to keep the man’s sperm from reaching the woman’s ovum (egg).  Some barrier methods also protect against sexually transmitted infections (STIs). The common barrier methods are spermicide, condom, fem shield, diaphragm, cervical cap, vault cap, and sponge, etc. […]

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Biology

Natural Methods of Contraception

Science > Biology > Human Population and Population Control > Natural Methods of Contraception Birth control also known as contraception is the use of various devices, drugs, agents, sexual practices, or surgical procedures to prevent conception or pregnancy. It enables people to choose when they want to have a baby. Contraception may be a temporary […]

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Biology

Population Control: Social and Economic Measures

Science > Biology > Human Population and Population Control > Social and Economic Measures for Population Control Population explosion is a social problem and it is deeply rooted in society. So efforts must be done to remove the social evils in the country. Population control is a way in which the rate of population growth […]

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Biology

Population Explosion

Science > Biology > Human Population and Population Control > Population Explosion Population Explosion refers to the sudden, drastic, and rapid rise in the size of the population, especially the human population. It is an unchecked growth of human population caused as a result of increased birth rate, decreased infant mortality rate, and improved life expectancy. It […]