The investigation on flood water spreading effects on the changes of soil fertility in flood water spreading station Herat Yazd

In this study flood harvesting was studied in Herat flood spreading station during 3 years (2005-2007).Changes in soil fertility in flood spreading areas with 3 treatment and 18 replicates were recorded. Strip, kind of land and time (year) are studied factors. Trapezoid methods were used to test soil fertility in different depth (0-90cm) and Strip, kind of land and time (year). Comparing mean of data, using Duncan test showed significant differences in control area(c). Changes N, P, O.C, C.E.C elements in control area and flood spreading area was not significant but K was significant (p<0.01). A change of N, O.C elements in dams was not significant. But P, K, C.E.C elements was significant. A change of C.E.C elements in years was not significant and N, P, O.C elements was significant. A change of N in different depths was not significant but in K, P, O.C, C.E.C elements was significant.