With the OM Balance tool you can make a balance of the organic matter management of your field or farm. A comparison is made between the input of effective organic matter with crop residues, cover crops and organic fertilizers and the decomposition of the organic matter in the soil. You can do this by inserting several soil characteristics, your cropping plan and the applied amounts of organic fertilizers. The result will show directly whether the organic matter balance is positive or not and which part of the allowable P application (according to Dutch legislation; only of relevance for the Netherlands) has been applied.