Dod 5105.76

{0,8} {1,2} {0,2} {0.1}
{0,6} {1,4} {0,3} {1.54}
{0,8} {1,6} {0,4} {2.5}
{0,8} {1,7} {0,5} {3.33}
{2,8} {1,2} {0,3} {0.2}
{2,8} {1,6} {0,6} {0.03}
Average relative humidity
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[Fig. 1](#fig1){ref-type="fig"} showed variation in relative humidity across the study site during the study period under different irrigation schemes. As shown by Fig. 1, it was observed that the relative humidity increases when the water table depth increases and falls when there is no water table depth or water table depths become shallower. The results observed here are in line with the previous findings reported from other local irrigation projects ([@bib17]).

![Trends in the relative humidity by time for four different irrigation sources.](apps.1400090fig1){#fig1}
Shadchi sand studies
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[Fig. 2](#fig2){ref-type="fig"} and [@bib4] also displayed variation in precipitation and temperature by time and location under different irrigation schemes. The changes observed for precipitation trends, both over the past year and in the previous year, were not statistically significant ([@bib19]). For every one-month measurement, the precipitation during the study period was 7--15 mm more than in the previous year.