Pedotransfer functions to estimate soil water content at field capacity and permanent wilting point in hot Arid Western India
| Autor: | Niels H. Batjes, Priyabrata Santra, Gerard B. M. Heuvelink, Mahesh Kumar, D K Painuli, R. N. Kumawat, K M Hati |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
western India Soil science pedotransfer functions 04 agricultural and veterinary sciences dry lands PE&RC soil moisture calculator Soil type 01 natural sciences Arid Soil water retention Water resources Permanent wilting point Field capacity Pedotransfer function Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries General Earth and Planetary Sciences Environmental science Water content ISRIC - World Soil Information 0105 earth and related environmental sciences |
| Zdroj: | Journal of Earth System Science, 127(3) Journal of Earth System Science 127 (2018) 3 |
| ISSN: | 0973-774X 0253-4126 |
| Popis: | Characterization of soil water retention, e.g., water content at field capacity (FC) and permanent wilting point (PWP) over a landscape plays a key role in efficient utilization of available scarce water resources in dry land agriculture; however, direct measurement thereof for multiple locations in the field is not always feasible. Therefore, pedotransfer functions (PTFs) were developed to estimate soil water retention at FC and PWP for dryland soils of India. A soil database available for Arid Western India (N=370) was used to develop PTFs. The developed PTFs were tested in two independent datasets from arid regions of India (N=36) and an arid region of USA (N=1789). While testing these PTFs using independent data from India, root mean square error (RMSE) was found to be 2.65 and 1.08 for FC and PWP, respectively, whereas for most of the tested ‘established’ PTFs, the RMSE was >3.41 and >1.15, respectively. Performance of the developed PTFs from the independent dataset from USA was comparable with estimates derived from ‘established’ PTFs. For wide applicability of the developed PTFs, a user-friendly soil moisture calculator was developed. The PTFs developed in this study may be quite useful to farmers for scheduling irrigation water as per soil type. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink