Statistical Terms Glossary

The irrigation depth is the amount of water that needs to be applied to an irrigated system when soil water is reduced to the specified depletion level. 

A measure of the amount of irrigation water beneficially used, divided by the amount of water applied.; The ratio or percentage of the irrigation water consumed by crops of an irrigated farm, field or project to the water diverted from the source of supply.

Irrigation frequency is defined as the frequency of applying water to a particular crop at a certain stage of growth and is expressed in days. Not all dependable rainfall is effective and some may be lost through surface runoff, deep percolation or evaporation. Only a part of the rainfall can be effectively used by the crop, depending on its root zone depth and the soil storage capacity. This part is referred to as the Effective Rainfall.

Facilities, structures, and associated equipment and services that facilitate the flows of goods and services between individuals, enterprises and governments. It includes: public utilities (electric power, telecommunications, water supply, sanitation and sewerage, and waste disposal); public works (irrigation systems, schools, housing and hospitals); transport services (roads, railways, ports, waterways and airports); and research and development facilities.

Reshaping land to planned grades in order to permit uniform and efficient application of irrigation water. Erosion should be minimized through the use of control structures.

The process of devolvement of authority and responsibility from government agencies managing irrigation systems to private-sector entities (often water users associations) established for such a purpose.

Area of land which is potentially irrigable. Country/regional studies assess this value according to different methods. For example, some consider only land resources, others consider land resources plus water availability, others include economical aspects in their assessments (such as distance and/or difference in elevation between the suitable land and the available water) or environmental aspects, etc. If available, this information is given in the individual country profiles. The figure includes the area already under agricultural water management .

Three parameters have to be considered in preparing an irrigation schedule: 1)The daily crop water requirements, 2) The soil, particularly its total available moisture or, water-holding capacity 3) The effective root zone depth.

Area where water is fully or partially controlled in order to improve agricultural performance. A scheme can be under individual (private) or collective (public) control. Schemes are usually classified as large (often public schemes), medium and small schemes.

The quantity of water exclusive of precipitation and soil moisture (i.e. quantity of irrigation water) required for normal crop production.

The ISEAL Impacts Code provides a framework for standards systems to better understand the social and environmental results of their work, as well as the effectiveness of their various activities and programs.

Activities of Islamic financial institutions differ from those of standard commercial depository corporations in that predetermined interest on financial transactions is prohibited. The nonpayment of interest on liabilities does not in itself preclude instruments from being classified as external debt.

Established in Malaysia in November 2002, it is an association of central banks and monetary authorities, as well as other institutions, that are responsible for the regulation and supervision of the Islamic financial services industry.

A sea service between:
- Ports situated on the mainland and on one or more of the islands of one and the same country;
- Ports situated on the islands of one and the same country.

Is a starch-based fructose sweetener, produced by the action of glucose isomerase enzyme on dextrose. This isomerisation process can be used to produce glucose/fructose blends containing up to 42% fructose. Application of a further process can raise the fructose content to 55%. Where the fructose content is 42%, isoglucose is equivalent in sweetness to sugar. Isoglucose production in the European Union is covered by the sugar regime and subject to a production quota.

An online discussion group where users, usually with common interests, can exchange open messages. Issue-based fora, i.e. organised around policy issues that have been formulated by policy-makers, interest groups or "experts", and presented as the heading of one or more discussion "threads". Responses are sought in order to gauge opinion or solicit ideas. Position statements, links to topic-related websites and other background information may also be presented, although they are often lacking.

Body that puts out new securities.

Compulsory timetable for issue of new securities (Switzerland, Federal Republic of Germany).

An individual good or service in the sample of products selected for pricing.

The term commonly used for the list of goods and services, together with their relative values of output or input, for which a sample of prices is collected for the purpose of compiling the PPI.

A detailed list of the characteristics that identify an individual sampled product. Its purpose is to ensure that a consistent price is collected from period to period relating to a consistent product with the same terms of sale in each period. Hence, the characteristics listed cover both the product (name, serial number, description, etc.) and the transaction (class of customer, size of shipment, discounts, payment terms, delivery details, etc.).

The replacement of a sampled product, or item, by a new product.

See International transactions reporting system

A flexible, plastic intrauterine device. It often has copper wire or sleeves on it. It is inserted into the women’s uterus through her vagina.