The AquaCrop Model simulations on yield (A) and soil water change (B).

<p>Diagonal lines represent 1∶1 lines.</p

Changes in soil water content in the upper 2 meter of the soil during the period of 1980–2010. A: water stored in the upper 2 meter during the fallow season, presented in positive percentage (in volume, v/v). B: water depletion in the upper 2 m during the growing season, presented in negative percentage (in volume, v/v).

<p>The soil water changes for fallow season were calculated as the soil water content of October deducted by that of June. Similarly, the soil water changes for growing season were calculated as the soil water content of June deducted by that of October in the previous year.</p

Soil moisture holding capacity of the soil profile (0–200 cm).

<p>Soil moisture holding capacity of the soil profile (0–200 cm).</p

Water balance (rainfall, change in soil water, E, T) of the total season (A), fallow season (B) and growing season (C) during the period of 1980–2010.

<p>Total season means the sum of fallow season and growing season.</p

Relationships between observed yield and total rainfall (A), rainfall in fallow season (B), rainfall in growing season (C), measured ET (D), Transpiration (E) and WUE (F).

<p>The significant level is 0.028 for (A), 0.167 for (B), 0.027 for (C). For D, E and F, the significant level is all smaller than 0.01.</p

Monthly rainfall and available soil water during the period 1980–2010. A: monthly rainfall distribution; B: monthly available water content.

<p>Black and white boxes show 75 and 25% percentile values. Whiskers show maximum and minimum values (the same applies to other figures). The growing season of winter wheat was 245 days from 1 October to 1 June. of the next year, highlighted in green bar. Fallow season was 120 days from 2^nd Jun. to 30^th Sep., highlighted in red bar.</p

Soil physical properties for different layers up to 200

<p>Soil physical properties for different layers up to 200</p