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, […]
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 […]
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, […]
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 […]
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. […]
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 […]
Several formulae have been suggested for constructing index numbers and the problem is that of selecting the most appropriate one in a given situation. The different tests are the unit test, time reversal test, factor reversal test, and circular test. Unit Test: This test states that the formula for constructing an index number should be […]
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 […]
Management > Managerial Statistics > Index Number By Kelly’s Method and Walsh’s Method Kelly’s Method: Truman L. Kelly has suggested the following formula for constructing index number. Here weights are the quantities which may refer to some period, not necessarily the base year or current year. Thus the average quantity of two or more years […]
Management > Managerial Statistics > Index Number By Marshall Edgeworth Method The Marshall Edgeworth Method for the index number, credited to Marshall (1887) and Edgeworth (1925), is a weighted relative of the current period to base period sets of prices. This index uses the arithmetic average of the current and based period quantities for weighting. Price Index by Marshall Edgeworth Method: […]