The Tigris is the eastern of the two great rivers that define Mesopotamia, the other being the Euphrates. The river flows south from the mountains of the Armenian Highlands through the Syrian and Arabian Deserts, before merging with the Euphrates and reaching to the Persian Gulf. (Wikipedia. 2026. Tigris. https://en.wikipedia.org/wiki/Tigris)
Aggregation of particles suspended in a liquid. (FAO & WHO. 2024. Manual on the development and use of FAO and WHO specifications for microbial pesticides. First edition. Rome and Geneva. https://doi.org/10.4060/cc9840en)
Cultural methods and practices refers to that broad set of management techniques or options which may be manipulated by agricultural producers to achieve their crop production goals. (Adapted from Kennedy et al. 1975)
Relationship between the measured values of a variable and their frequency of occurrence. (UNESCO-WMO International Glossary of Hydrology, 2012 https://library.wmo.int/viewer/35589/download?file=wmo_385-2012.pdf&type=pdf&navigator=1)
Note
Frequency distributions can show either the actual number of observations falling in each range or the percentage of observations.
The rate of economic growth refers to the geometric annual rate of growth in GDP between the first and the last year over a period of time. (Wikipedia, 2024. Economic growth. https://en.wikipedia.org/wiki/Economic_growth)
