"Predicting chemical and biological reactions during unsaturated flow through soils is complex, and the accuracy of model predictions is open to question. were to test how accurately the transport of nutrients (Ca2+, Mg2+, K+, NH4+, and NO3-) in soils can be predicted when differing amounts of nutrients or acid are added," researchers in Witzenhausen, Germany report.
"Undisturbed columns of 2 sandy surface soils from arable sites in Darmstadt, Germany, and Sohar, Oman, were irrigated for 360 and 376 days with 3 mm/day at 10 degrees C. Three treatments were carried out: the columns were irrigated with differing fertilising solutions (Fert-1 or Fert-2 treatments) or with HCl. …
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