| Ahuja et al. (1984), effective-porosity relations for saturated conductivity. | Chickasha, Oklahoma, and the Wahiawa Plateau, Oahu, Hawaii, USA | 1 |
| Aimrun & Amin (2009), Tanjung Karang Rice Irrigation Project, Malaysia. | Tanjung Karang Rice Irrigation Project, located on a flat coastal plain in the Integrated Agricultural Development Area (IADA Barat Laut Selangor), Malaysia | 1 |
| Beniaich et al. (2023), soil-water PTFs for four Moroccan regions. | Agricultural topsoils in Doukkala, Gharb-Loukouss, Moulouya, and Tadla, Morocco | 14 |
| Chakraborty et al. (2011), point water-retention PTFs for Indian soils. | India | 6 |
| Clapp and Hornberger (1978) representative soil hydraulic parameters by texture. | United States | 1 |
| Cosby et al. (1984), United States. | United States | 1 |
| Dharumarajan et al. (2019) hydraulic PTFs for the Karnataka Plateau. | Karnataka Plateau, India | 5 |
| Ferrer Julià et al. (2004), saturated-conductivity PTFs for Spanish soils. | Spanish mainland on the Iberian Peninsula | 41 |
| Hodnett & Tomasella (2002), tropical-soil regressions for four van Genuchten parameters. | Tropical soils between approximately 25 degrees N and 25 degrees S. | 1 |
| Jabro (1992), United States. | USA | 1 |
| Li et al. (2007), Fengqiu County, North China Plain, China. | Fengqiu County soils in the North China Plain, China | 1 |
| Mayr and Jarvis (1999) modified Brooks-Corey water-retention parameter PTFs. | England and Wales | 1 |
| Oosterveld and Chang (1980), soil-moisture retention from texture and depth. | Southern Alberta, Canada | 5 |
| Pidgeon (1972), available-water regressions for ferrallitic soils in Uganda. | Non-alluvial ferrallitic soils in Uganda, predominantly kaolinitic and possibly illitic | 17 |
| Puckett et al. (1985), Alabama Lower Coastal Plain Ultisols. | Lower Coastal Plain of Alabama, USA | 1 |
| Rawls et al. (1982), water-retention regressions for soils across the USA. | Agricultural soils from 32 states of the USA | 3 |
| Saxton and Rawls (2006), soil water characteristics from texture and organic matter. | United States | 7 |
| Tiwary et al. (2014), hydraulic PTFs for two major soil regions of India. | Indo-Gangetic Plains and black soil region of India | 2 |
| Varallyai et al. (1982), water-retention parameter regressions for Hungarian soils. | Hungary, mainly the Hungarian Plain | 4 |
| Vereecken et al. soil-moisture retention regressions for Belgian soils. | Belgian territory north of the river axis Samber and Meuse | 2 |
| Wang et al. (2012), surface loess across China's Loess Plateau. | Surface soils across the entire Loess Plateau, China | 1 |
| Weber et al. (2020), compiled international soil hydraulic data. | Portuguese, German, UNSODA, and Vereecken soil data collections | 1 |