Statistical Terms Glossary

It is an effort to put a description of Arabic software especially these available on the Internet. It also has references to other resources on the Internet concerning the Arabic language and the Arabic world.

Land used in most years for growing temporary crops.

Buying (or borrowing) in one market and selling (or lending) in another to take advantage of inefficiencies or price differences.

Person systematically engaged in arbitrage dealing.

ARCH/stochastic volatility models are time series models that allow for time-varying variances.

Faithful support for a cause or political party or religion.

A means of ensuring long-term preservation of data including ensuring its understandability by users.

Marine Areas Beyond National Jurisdiction (ABNJ), commonly called the high seas, are those areas of ocean for which no one nation has sole responsibility for management.

Portion of the full/partial control irrigation area that is irrigated from mixed surface water and groundwater or from non-conventional sources of water such as agricultural drainage water, treated wastewater or desalinated water.

Localized irrigation is a system where the water is distributed under low pressure through a piped network, in a pre-determined pattern, and applied as a small discharge to each plant or adjacent to it.

A sprinkler irrigation system consists of a pipe network, through which water moves under pressure before being delivered to the crop via sprinkler nozzles.

Surface irrigation systems are based on the principle of moving water over the land by simple gravity in order to moisten the soil.

Portion of the area equipped for irrigation that is irrigated from wells (shallow wells and deep tube wells) or springs.

Portion of the equipped for irrigation area that is irrigated from rivers or lakes (reservoirs, pumping or diversion).

Portion of the area equipped for irrigation that is actually irrigated, in a given year. It refers to physical areas. Irrigated land that is cultivated more than once a year is counted only once.

Area equipped to provide water (via irrigation) to crops. It includes areas equipped for full/partial control irrigation, equipped lowland areas, pastures, and areas equipped for spate irrigation.

Area equipped for irrigation where pumps are used for water supply from the source to the scheme. It also includes areas where water is drained out with human- or animal-driven water lifting devices. It does NOT refer to pumping required for the technology used within the field (such as sprinkler irrigation or localized irrigation, which require pressure and thus pumping).

Is a set of land elements, which may be either points or segments of land.

Total area of the country, including area under inland water bodies. Possible variations in the data may be due to updating and revisions of the country data and not necessarily to any change of area

Are budgetary payments made to individual producers on the basis of area (acres or hectares) of eligible land.

An area probability sample is one in which geographic areas are sampled with known probability.

Irrigated area affected by salinization, including formerly irrigated land abandoned because of declining productivity due to mineral buildup caused by inadequate drainage.

Sum of total area equipped for irrigation and areas with other forms of agricultural water management (non-equipped flood recession cropping area and non-equipped cultivated wetlands and inland valley bottoms). The classification adopted by AQUASTAT is presented in the following diagram. The blue ones are available in the AQUASTAT database and an explanation of each of them is given in this glossary.