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. 2021 Jul 12;8:170. doi: 10.1038/s41597-021-00964-1

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© The Author(s) 2021

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Fig. 2 — (a) Spatial distribution of the target soil moisture data; 1114, 1064, and 683 grid cells are available for the layers of 0–10 cm, 10–30 cm, and 30–50 cm, respectively. (b) Data length and measurement depths of the target soil moisture over the period of 2000–2019.