Determination of Organic Matter by Using Titrimetric and Loss on Ignition Methods for Northern Iraqi Governorates Soils

The study was carried out to determine soil organic matter content (SOM) using loss on ignition (LOI) and titrant methods. Eighty-four composite samples were collected from surface of randomly different locations in four governorates northern parts Iraq. percent mean values SOM recorded 2.34, 2.399 1.821, respectively for Erbil, Sulaymaniyah, Kirkuk, Duhok the LOI method, while lower obtained 1.39, 1.595 0.98% by method same samples. A low relationship between two procedures (r2=0.462, 0.585 0.241) Current results revealed that is more accurate convenient be used determination soils our area, further studies must done other methods find suitable procedure this purpose.