p. 1406−1415
2423-396X
Vol.29/No.6
p. 1416−1426
2423-396X
Vol.29/No.6
1, is less than 3.8 percent.
Conclusion: Using Laplace transform to the saint venant equations and with respect to upstream and downstream boundary a formula for routing discharge presented. Investigation of the applicability range of presenting formula and cognitive effective factors on accuracy is necessary. So, the finite volume method using the time splitting scheme was employed to develop a computer code for solving the one dimensional unsteady flow equation. Then some tests of unsteady flow were simulated and verified the equations. The results showed that the maximum error increases with decreasing KF2 and increasing the rate of sudden changes of discharge. The maximum error in the presented formula for all tests with KF2>1, less than 3.8 percent.]]>
p. 1427−1437
2423-396X
Vol.29/No.6
p. 1438−1446
2423-396X
Vol.29/No.6
p. 1447−1457
2423-396X
Vol.29/No.6
p. 1458−1468
2423-396X
Vol.29/No.6
p. 1469−1480
2423-396X
Vol.29/No.6
p. 1481−1492
2423-396X
Vol.29/No.6
p. 1493−1505
2423-396X
Vol.29/No.6
p. 1506−1521
2423-396X
Vol.29/No.6
p. 1522−1532
2423-396X
Vol.29/No.6
p. 1533−1541
2423-396X
Vol.29/No.6
p. 1542−1552
2423-396X
Vol.29/No.6
p. 1553−1566
2423-396X
Vol.29/No.6
p. 1567−1577
2423-396X
Vol.29/No.6
p. 1578−1589
2423-396X
Vol.29/No.6
p. 1590−1600
2423-396X
Vol.29/No.6
p. 1601−1611
2423-396X
Vol.29/No.6
p. 1612−1628
2423-396X
Vol.29/No.6
p. 1629−1639
2423-396X
Vol.29/No.6
p. 1640−1650
2423-396X
Vol.29/No.6
p. 1651−1661
2423-396X
Vol.29/No.6
6 log cfu/g) was gained in legume land uses in both climate conditions. Furthermore, the highest numbers of organic and mineral phosphate solubilizing bacteria (5.3 log cfu/g) were counted in samples taken from pastures, in other word in soil samples which were collected from uncultured land in semi-moist climate conditions. Enzyme assay showed that acid phosphatase activity (430 µg pNP/g.h) in semi-moist climate conditions were increased three times in comparison to semi-arid climate conditions. Perhaps, this increase can be explained by parameters such as high moisture content and organic matter which can cause an increase in the number of bacteria and soil enzyme content. Our results showed that, alkaline phosphatase activities (APAs) were affectd by interaction effects of land uses and climate, wherein the highest APA (810 µg pNP/g.h) was measured in legume samples in semi-arid climate conditions. The pH of these soil samples and supporting legume rhizospheres from AP producing microorganisms may be the reasons of this increment.
Conclusion: The highest activity of the soil acid phosphatase was observed in soil samples which were taken from uncultivated area under semi-moist climate conditions (namely pastures) (866.59 µgPNP/g.h) while the soil alkaline phosphatase activity had high mean in legume land use soil samples under semi-arid climate conditions (795.15 µPNP/g.h). The total number of bacteria was the highest in semi-arid leguminous land use (14.13×106 cfu/g) but the total numbers of solubilizing bacteria in both mineral and organic media were the highest in semi-moist uncultivated area (respectively 1.9 ×106 and 1.48 × 106cfu/g).]]>
p. 1662−1673
2423-396X
Vol.29/No.6
p. 1674−1687
2423-396X
Vol.29/No.6
p. 1688−1698
2423-396X
Vol.29/No.6
p. 1699−1710
2423-396X
Vol.29/No.6
p. 1711−1720
2423-396X
Vol.29/No.6
p. 1721−1734
2423-396X
Vol.29/No.6
p. 1735−1748
2423-396X
Vol.29/No.6
p. 1749−1758
2423-396X
Vol.29/No.6