• Baltic agriculture in transition - the contribution to nutrient loads in the Gulf of Riga drainage basinVagstad, Nils; Jansons, Viesturs; Loigu, Enn; Deelstra, JohannesInternational Conference on Agricultural Effects on Ground and Surface Waters : Research and Policy at the Edge of Science and Society : Wageningen, 20002000 / p. 1-9 https://www.researchgate.net/publication/267831903_Baltic_agriculture_in_transition-the_contribution_to_nutrient_loads_in_the_Gulf_of_Riga_drainage_basin
• Baltic agriculture in transition - the contribution to nutrient loads in the Gulf of Riga drainage basinVagstad, Nils; Deelstra, Johannes; Jansons, Viesturs; Loigu, EnnAgricultural effects on ground and surface waters : research at the edge of science and society2002 / p. 367-372
• Climate change and the potential effects on runoff and nitrogen losses in the Nordic–Baltic regionOygarden, Lillian; Deelstra, Johannes; Iital, ArvoAgriculture, ecosystems and environment2014 / p. 114-126 : ill https://doi.org/10.1016/j.agee.2014.06.025 https://www.scopus.com/sourceid/15110 https://www.scopus.com/record/display.uri?eid=2-s2.0-85027933104&origin=inward&txGid=7dc1b483ec64dcd09b78ea9c6041db33 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=AGR%20ECOSYST%20ENVIRON&year=2014 https://www.webofscience.com/wos/woscc/full-record/WOS:000347585100013
• Comparative analysis of hydrological and hydrochemical data from small watershedsLoigu, Enn; Vassiljev, Anatoli; Iital, Arvo; Vagstad, Nils; Deelstra, JohannesXX Nordic Hydrological Conference, Helsinki, Finland, 10-13 August, 1998. Vol. 11998 / p. 225
• Effects of large-scale changes in emissions on nutrient concentrations in Estonian rivers in the Lake Peipsi drainage basinIital, Arvo; Stalnacke, Per; Deelstra, Johannes; Loigu, Enn; Pihlak, MargusJournal of hydrology2005 / 1/4, p. 261-273 : ill
• Hydrological pathways and nitrogen runoff in agricultural dominated catchments in Nordic and Baltic countriesDeelstra, Johannes; Iital, Arvo; Povilaitis, Arvydas; Kyllmar, Katarina; Greipsland, Inga; Blicher-Mathiesen, Gitte; Jansons, Viesturs; Koskiaho, Jari; Lagzdins, AinisAgriculture, ecosystems and environment2014 / p. 211-219 : ill https://doi.org/10.1016/j.agee.2014.06.007 https://www.scopus.com/sourceid/15110 https://www.scopus.com/record/display.uri?eid=2-s2.0-84903446532&origin=inward&txGid=a40e2ec0f9e069dfbc9dc176edbc654b https://jcr.clarivate.com/jcr-jp/journal-profile?journal=AGR%20ECOSYST%20ENVIRON&year=2014 https://www.webofscience.com/wos/woscc/full-record/WOS:000343629400023
• Hydrological processes in small agricultural catchmentsDeelstra, Johannes; Eggestad, Hans Olav; Iital, Arvo; Jansons, ViestursProceedings of the 10th International Drainage Workshop of ICID Working Group on Drainage : Helsinki/Tallinn 6-11. July 20082008 / p. 314-333 : ill
• Hydrology in small agricultural catchments, pathways and their impact on nutrient and soil lossDeelstra, Johannes; Eggestad, Hans Olav; Iital, Arvo; Jansons, ViestursStatus and Perspectives of Hydrology in Small Basins : International Workshop : Goslar - Hahnenklee, Germany, 30 March - 2 April 20092009 / p. 75-79
• Interactions between hydrology and nutrient runoff in small agricultural catchments. A comparative study of Estonian, Latvian and Norwegian catchmentsDeelstra, Johannes; Vagstad, Nils; Loigu, Enn; Vassiljev, Anatoli; Jansons, ViestursXX Nordic Hydrological Conference, Helsinki, Finland, 10-13 August, 1998. Vol. 11998 / p. 120-128: ill
• Long-term monitoring of nutrient losses from agricultural catchments in the Nordic–Baltic region – a discussion of methods, uncertainties and future needsKyllmar, Katarina; Bechmann, Marianne; Deelstra, Johannes; Iital, Arvo; Blicher-Mathiesen, Gitte; Jansons, Viesturs; Koskiaho, Jari; Povilaitis, ArvydasAgriculture, ecosystems and environment2014 / p. 4-12 : ill https://doi.org/10.1016/j.agee.2014.07.005 https://www.scopus.com/sourceid/15110 https://www.scopus.com/record/display.uri?eid=2-s2.0-85027931734&origin=inward&txGid=01369d8e33448a6b7a2b4363bc30847b https://jcr.clarivate.com/jcr-jp/journal-profile?journal=AGR%20ECOSYST%20ENVIRON&year=2014 https://www.webofscience.com/wos/woscc/full-record/WOS:000347585100002
• Monitoring of diffuse pollution from agriculture to support implementation of the WFD and the Nitrate Directive in EstoniaIital, Arvo; Pachel, Karin; Deelstra, JohannesEnvironmental science & policy2008 / p. 185-193 https://www.researchgate.net/publication/223871588_Monitoring_of_diffuse_pollution_from_agriculture_to_support_implementation_of_the_WFD_and_the_Nitrate_Directive_in_Estonia
• Nutrient losses from agricultural areas in the Gulf of Riga drainage basinVagstad, Nils; Jansons, Viesturs; Loigu, Enn; Deelstra, JohannesEcological engineering2000 / p. 435-441
• Nutrient runoff from agricultural areas in Estonia and LatviaVagstad, Nils; Loigu, Enn; Jansons, Viesturs; Deelstra, Johannes; Njos, A.A synthesis report of the Gulf of Riga project's : sub-project Soil and Nutrient loss from small catchments : technical report1998 / [36] p
• Reprint of "Hydrological pathways and nitrogen runoff in agricultural dominated catchments in Nordic and Baltic countries"Deelstra, Johannes; Iital, Arvo; Povilaitis, Arvydas; Kyllmar, Katarina; Greipsland, Inga; Blicher-Mathiesen, Gitte; Jansons, Viesturs; Koskiaho, Jari; Lagzdins, AinisAgriculture, ecosystems and environment2014 / p. 65-73 : ill https://doi.org/10.1016/j.agee.2014.06.032 https://www.scopus.com/sourceid/15110 https://www.scopus.com/record/display.uri?eid=2-s2.0-85027925392&origin=inward&txGid=b28a3474c9b04039e3fa45d50c3a3c93 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=AGR%20ECOSYST%20ENVIRON&year=2014 https://www.webofscience.com/wos/woscc/full-record/WOS:000347585100008
• Retention of nitrate in groundwater. The case of Lake Peipsi basin, EstoniaIital, Arvo; Deelstra, Johannes; Stalnacke, Per; Loigu, Enn; Pihlak, MargusXXIII Nordic Hydrological Conference ["Fresh Water Resources Management"] : Tallinn, Estonia, 8-12 August 2004 : selected articles. Vol. I2004 / p. 169-179 : ill
• Risk assessment of phosphorus loss from agriculture in the Nordic and Baltic countries using the P index approachBechmann, Marianne; Deelstra, Johannes; Iital, Arvo; Jansons, ViestursXXIII Nordic Hydrological Conference ["Fresh Water Resources Management"] : Tallinn, Estonia, 8-12 August 2004 : selected articles. Vol. I2004 / p. 159-168 : ill https://artiklid.elnet.ee/record=b2343294*est
• The flashiness index and transport/retention of nutrients and suspended solidsDeelstra, Johannes; Iital, ArvoNJF Seminar 373 : Transport and Retention of Pollutants from Different Production Systems : Tartu, Estonia, 11-14 June 20062006 / p. 62-69 : ill., map https://artiklid.elnet.ee/record=b2645417*est
• The GEF - Baltic Sea Regional Project - monitoring and assessment of non-point source pollutionDeelstra, Johannes; Vagstad, Nils; Loigu, Enn; Iital, Arvo; Jansons, Viesturs; Abramenko, Kaspars; Sileika, Antanas SigitasXXIII Nordic Hydrological Conference ["Fresh Water Resources Management"] : Tallinn, Estonia, 8-12 August 2004 : selected articles. Vol. II2004 / p. 393-405 : ill https://artiklid.elnet.ee/record=b2343498*est
• The use of the flashiness index as a possible indicator for nutrient loss prediction in agricultural catchmentsDeelstra, Johannes; Iital, ArvoBoreal environment research2008 / 3, p. 209-221 : ill https://www.borenv.net/BER/archive/pdfs/ber13/ber13-209.pdf
• Time resolution and hydrological characteristics in agricultural catchmentsDeelstra, Johannes; Eggestad, Hans Olav; Iital, Arvo; Jansons, Viesturs; Barkved, Line J.Status and perspectives of hydrology in small basins2010 / p. 138-143 https://www.researchgate.net/publication/215743143_Time_resolution_and_hydrological_characteristics_in_agricultural_catchments