Using  Intensity / Quantity Relationships  in Potassium Availability for Soils TreatedWith Different Organic Manures.

	Using Intensity / Quantity Relationships in Potassium Availability for Soils TreatedWith Different Organic Manures.
Journal of Tikrit University For Agriculture Sciences
Article 1, Volume 13, Issue 4, 2013, Pages 113-122
Abstract
AFeild experiment was conducted at Mosul University .Colloge of Agriculture and Forestry Farms,during the agriculture seson(2011-2012) to study the effect of organic feotilizers(manure ,sheep,politry and urea)with and without sulfure incorporation using Randomized complete block design All the treatments in cubated at field condition and water content was monorated at F.C during incubation beriod (150)days . at the end of field experiment , two Laboratory experiments were conducted . first one was adsorption of K by adding varying conc. of KCl (0-2) mmole k.L-1b,while the other was desorption of k added using 0. 01 M CaCl2 The results to calculate potassium desorption index (DI) showed :an increasing of k fertilizer caused asignificant increasement in k. conc. of soil solution for all treatment ,and adsorption desorption curves showed adifferent slope (Buffer Capacity) according to the soil treatment ,also the pathway of adsorption curves showed more than one slope .A maxmium k adsorption was at urea(M1) while the minium adsorption was at cow manur (M4 ),sulfure incorporated with KCl index more availability.
Keywords
Potassium; Organic manure; Sulfure; Desorption

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