In modern agriculture, a rare breed is a breed of poultry or livestock that has a very small breeding population, usually from a few hundred to a few thousand. Because of their small numbers, rare breeds may have a threatened conservation status, and they may be protected under regional laws. (https://en.wikipedia.org/wiki/Rare_breed_(agriculture))
Gypsisols are soils with substantial accumulation of secondary gypsum (CaSO4·2H2O). These soils are found in the driest parts of the arid climate zone, which explains why leading soil classification systems labelled many of them Desert grey-brown soils (former Soviet Union). The Soil Map of the World (FAO–UNESCO, 1971–1981) accommodates them among Yermosols or Xerosols. In the United States of America most of them belong to the Gypsids. (IUSS Working Group WRB. 2015. World Reference Base for Soil Resources 2014, update 2015 International soil classification system for naming soils and creating legends for soil maps. World Soil Resources Reports No. 106. FAO, Rome.)
A genet is a member of the genus Genetta, which consists of 17 species of small African carnivorans. (https://en.wikipedia.org/wiki/Genet_(animal))
Note
For "genets" as group of genetically identical individuals (plants, fungi, bacteria etc.) that have grown in a given location, all originating from asexual reproduction of a single ancestor; a group of ramets, use <c_ad9d76d1>.
Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. (Knight, Randall D. (2007). "Fluid Mechanics". Physics for Scientists and Engineers: A Strategic Approach (google books) (2nd ed.). San Francisco: Pearson Addison Wesley. p. 1183. ISBN 978-0-321-51671-8.)
Sunburn is a form of radiation burn that affects living tissue, such as skin, that results from an overexposure to ultraviolet (UV) radiation, usually from the Sun. (https://en.wikipedia.org/wiki/Sunburn)
Note
Pathological condition ascribed to excessive level of ultraviolet irradiation
Price discrimination exists when the same product is sold at different prices to different buyers. The cost of production is either the same, or it differs but not as much as the difference in the charged prices. (Koutsoyiannis, A. (1979). Price Discrimination. In: Modern Microeconomics. Palgrave, London. https://doi.org/10.1007/978-1-349-16077-8_7)
Policy that changes the domestic prices of inputs or outputs from those that would otherwise prevail, takes many forms and can target consumers, producers and/or trade. (The State of Agricultural Commodity Markets, SOCO, FAO, 2015 (MO496).)
In earth science, chronostratigraphy defines rock strata by their temporal relations, reconciling stratigraphy with relative and chronometric dating in the historical discipline of geology. (Richter D. (2017) Chronostratigraphy. In: Gilbert A.S. (eds) Encyclopedia of Geoarchaeology. Encyclopedia of Earth Sciences Series. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-4409-0_5)
The primary sector of the economy is the sector of an economy making direct use of natural resources. This includes agriculture, forestry and fishing, mining, and extraction of oil and gas. This is contrasted with the secondary sector, producing manufactured and other processed goods, and the tertiary sector, producing services. (FAO. Term Portal. FAOTERM. Accessed 22 May 2023. http://www.fao.org/faoterm/en/)
Primulales was an order of flowering plants. This order was recognized in several systems with little variation in circumscription (see Bentham & Hooker, Engler and Wettstein system). In the classification system of Dahlgren the Primulales were in the superorder Primuliflorae (also called Primulanae). In the 1981 version of the Cronquist system it was an order placed in subclass Dilleniidae. (Wikipedia. 2025. Primulales. https://en.wikipedia.org/wiki/Primulales)
