Fertility

Fertility is the natural capability to produce offspring. As a measure, fertility rate is the number of offspring born per mating pair, individual or population. Fertility differs from fecundity, which is defined as the potential for reproduction (influenced by gamete production, fertilization and carrying a pregnancy to term) . A lack of fertility is infertility while a lack of fecundity would be called sterility.

Human fertility depends on factors of nutrition, sexual behavior, consanguinity, culture, instinct, endocrinology, timing, economics, way of life, and emotions.

Demography

In demographic contexts, fertility refers to the actual production of offspring, rather than the physical capability to produce which is termed fecundity. While fertility can be measured, fecundity cannot be. Demographers measure the fertility rate in a variety of ways, which can be broadly broken into "period" measures and "cohort" measures. "Period" measures refer to a cross-section of the population in one year. "Cohort" data on the other hand, follows the same people over a period of decades. Both period and cohort measures are widely used.

Fertility (film)

Fertility (German:Fruchtbarkeit) is a 1929 German silent film directed by Eberhard Frowein.

Cast

  • Edward Barby as Dr. Friedrich Witte
  • Valeria Blanka as Elinor, seine Frau
  • Anny Eberty as Maria Huber
  • Paul Henckels as Dr. Paul Märker
  • Hanna Hoessrich as Marianne, seine Tochter
  • Hans Oberländer as Ein Pfarrer
  • Walter Steinbeck as Direktor Roeder
  • References

  • Ginsberg & Mensch p.312
  • Bibliography

  • Ginsberg, Terri & Mensch, Andrea (ed.) A Companion to German Cinema. John Wiley & Sons, 2012.
  • External links

  • Fertility at the Internet Movie Database
  • Soil fertility

    Soil fertility refers to the ability of a soil to sustain plant growth, i.e. to provide plant habitat and result in lasting constant yields of high quality.
    A fertile soil has the following properties:

  • It is rich in nutrients necessary for basic plant nutrition, including nitrogen, phosphorus and potassium
  • It contains sufficient minerals (trace elements) for plant nutrition, including boron, chlorine, cobalt, copper, iron, manganese, magnesium, molybdenum, sulphur, and zinc.
  • It contains soil organic matter that improves soil structure and soil moisture retention.
  • Soil pH is in the range 6.0 to 6.8 for most plants but some prefer acid or alkaline conditions.
  • Good soil structure, creating well drained soil, but some soils are wetter (as for producing rice) or drier (as for producing plants susceptible to fungi or rot, such as agave).
  • A range of microorganisms that support plant growth.
  • It often contains large amounts of topsoil.
  • In lands used for agriculture and other human activities, soil fertility typically arises from the use of soil conservation practices.

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