Pereira, J.Coutinho, J.Moreira, N.Trindade, H.2012-04-102012-04-102010Pereira J., Coutinho J., Moreira N., Trindade H., 2010. Comparison of field methods to assess net N mineralization in soils under different rates of cattle-slurry application and a maize / annual ryegrass cropping system. In: C. Marques dos Santos Cordovil, L. Ferreira (Eds). Proceedings of the 14th Ramiran International Conference, of the FAO ESCORENA Network on the Recycling of Agricultural, Municipal and Industrial Residues in Agriculture: Treatment and use of organic residues in agriculture - Challenges and opportunities towards sustainable management. 13th - 15th September 2010, Lisbon, Portugal, ISBN 978-972-8669-47-8, pp. 617-620.http://hdl.handle.net/10400.19/1045Knowledge of the amount of N mineralized from manure applied to soil and its availability to crops is extremely important for precise fertilization practices and environment protection. The objectives of our study were to evaluate the effect of cattle-slurry application rate on net N mineralization (NNM) and compare the field methods of soil core incubation with acetylene (SIA) and the sequential in situ incubation of undisturbed soil cores (SIU) to assess N mineralization in an intensive double-cropping forage system producing maize and Italian ryegrass (winter crop) for silage.engMineralizationconference object