Table 1 Categories of years based on annual rainfall: 1981–1994.

From: Comparing watershed afforestation and natural revegetation impacts on soil moisture in the semiarid Loess Plateau of China

Category

Rainfall (mm)

Mean (mm) ± standard deviation

Years

Normal

463–566

501 ± 30

1984, 1985, 1989, 1993, 1994

Dry

<463

401 ± 53

1982, 1986, 1991

Wet

>566

633 ± 34

1981, 1983, 1990, 1992

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