Nitrogen cycling in coffee agroecosystems: net N mineralization and nitrification in the presence and absence of shade trees
dc.contributor.author | Babbar, Liana Ines | en_US |
dc.contributor.author | Zak, Donald R. | en_US |
dc.date.accessioned | 2006-04-10T18:18:27Z | |
dc.date.available | 2006-04-10T18:18:27Z | |
dc.date.issued | 1994-03 | en_US |
dc.identifier.citation | Babbar, Liana I., Zak, Donald R. (1994/03)."Nitrogen cycling in coffee agroecosystems: net N mineralization and nitrification in the presence and absence of shade trees." Agriculture, Ecosystems & Environment 48(2): 107-113. <http://hdl.handle.net/2027.42/31733> | en_US |
dc.identifier.uri | http://www.sciencedirect.com/science/article/B6T3Y-4914SW9-8J/2/73e4f21d963e0533681739fcb8678133 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/31733 | |
dc.description.abstract | Coffee (Coffea arabica L.) agroecosystems in Costa Rica receive relatively large inputs of N through fertilization (approximately 30 g N m-2 year-1). However, little is known regarding the rate at which N is mineralization from organic matter and its subsequent transformation within the soil. We studied the seasonal and spatial variation of N transformations in coffee plantations with and without shade trees in the Central Valley of Costa Rica. Net N mineralization and net nitrification, assayed using an in situ incubation procedure, were measured at monthly intervals for 1 year. Both net N mineralization and net nitrification displayed marked seasonal variation; the significantly lowest rates occurred during the dry season (January - March). The mean annual rate of net N mineralization was 14.8 g mineralized N was oxidized to NO3- in both plantation types. Even though N availability was greater in unshaded plantations, related studies indicate that leaching losses are less than those from unshaded plantations. In combination, these results suggest that N is cycled more conservatively in shaded plantations than in unshaded plantations. | en_US |
dc.format.extent | 545489 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Elsevier | en_US |
dc.title | Nitrogen cycling in coffee agroecosystems: net N mineralization and nitrification in the presence and absence of shade trees | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | School of Natural Resources and Environment, University of Michigan, Ann Arbor, MI 48109-1115, USA | en_US |
dc.contributor.affiliationum | School of Natural Resources and Environment, University of Michigan, Ann Arbor, MI 48109-1115, USA | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/31733/1/0000672.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1016/0167-8809(94)90081-7 | en_US |
dc.identifier.source | Agriculture, Ecosystems & Environment | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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