POTASSIUM SUPPLYING POWER IN MARSHES SOILS AND SEDIMENTS

Potassium supplying power of representative marsh soils sediments of south Iraq was, evaluated by chemical methods. Results indicate that soils are relatively more in all forms of potassium in comparison to the sediment samples. Generally, both of them have the relatively high content of potassium supplying power and could be enough for (10- 20) years of intensive cropping. These high amounts represented, however less than (15.605) and (13.705) of the total mineral potassium content of soils and sediments, respectively. On the basis of the woodruff scale, all the studied samples could be placed adequate-good category.