Table 2: Leachate iron concentration (ppm) as affected by iron source (iron-DTPA or iron sulfate).

Iron-sourcez Week
1 5
Iron sulfate Iron
0.90 a 0.75 NS
Iron-DTPA 1.04 b 2.30 b**

 
ziron supplied at 1 ppm. yMeans followed by different letters indicates significant differences between Fe-source at P =0.01, pairwise t - test. xNS, **, ***Nonsignificant differences between weeks at P =0.01 and 0.001, respectively, pairwise t - test.