Every reference with a DOI in the deposited reference list resolved to a known
work in Crossref or DataCite at the dated check, and none carried a retraction,
withdrawal, or removal notice.
The 56 references without a DOI — listed, not checked
no DOI — not checkedBarber SA (1985) Soil nutrients bioavailability. A mechanistic approach. John Wiley & Sons, New York
no DOI — not checkedBlack CA (1989) Reducing American exposure to nitrate, nitrite and nitroso compounds: The national network to prevent birth defects proposal. Comments from CAST 1989-1. Ames, Iowa
no DOI — not checkedBloom TM, Sylvester-Bradley R and Vaidyanathan LV (1988) Apparent recovery of fertilizer nitrogen by winter wheat. In: Jenkinson DS and Smith KA (eds) Nitrogen efficiency in agicultural soils, pp 27–45. Elsevier Applied Science, London
no DOI — not checkedBock BR (1986) Increasing cereals yields with higher ammonium-nitrate ratios: review of potentials and limitations. J Environ Sci Health A21: 723–758
no DOI — not checkedBock BR (1987) Agronomic differences between nitrate and ammoniacal nitrogen. Proceedings of the 37th annual meeting, Fertilizer Industry round table, pp 105-110. November 1987, New Orleans, Louisiana
no DOI — not checkedBock BR and Hergert GW (1991) Fertilizer Nitrogens Management. In: Follet RFet al. (eds) Managing nitrogen for ground water quality and farm profitability, pp 139–164. SSSA Madison, WI
no DOI — not checkedBockman OC, Kaarstad O, Lie OH and Richards I (1990) Agriculture and Fertilizers. Agricultural Group, Norsk Hydro, Oslo
no DOI — not checkedBrown DA and Scott DH (1984) In: Roots, Nutrients and Water Influx, and plants Growth, pp 101-136. SSSA Special Publication No. 49. Madison, WI
no DOI — not checkedChristianson CB and Schultz JJ (1991) Strategies to improve nitrogen fertilizer use efficiency in upland systems. Paper presented at training program: Plant nutrient management for sustainable agriculture. October 1991, IFDC, Muscle Shoals, Alabama
no DOI — not checkedClark RB (1989) Marine pollution. Clarendon Press, Oxford
no DOI — not checkedDilz K (1988) Efficiency of uptake and utilization of fertilizer nitrogen by plant. In: Jenkinson DS and Smith KA (eds) Nitrogen efficiency in agricultural soils, pp 1–26. Elsevier Applied Science, London
no DOI — not checkedDuijvenbooden W Van and Matthijsen AJCM (1987) Basis document Nitraat. Rapport nr. 758473007. Nat Inst of Pub Health and Envir Hyg Bilthoven, The Netherlands
no DOI — not checkedFan LT and Singh SK (1990) Controlled release - A quantitative treatment. Springer-Verlag, Berlin
no DOI — not checkedFeigin A and Halevy J (1989) Irrigation-fertilizationcropping management for maximum economic return and minimum pollution of ground water. Research report Inst Soil Water, ARO, The Volcani Center, Bet dagan. 122 p.
no DOI — not checkedForman D (1989) Are nitrates a significant risk factor in human cancer? Cancer Surveys 8: 443–458
no DOI — not checkedFujii T and Yazawa F (1989) Development of coated fertilizer (ceracoat). In: Fertilizer, Present and Future, Symposium proc. Tokyo 1989, pp 101-109. Japanese Soc Soil Sci and Plant Nutr
no DOI — not checkedFujita T, Maeda S, Shibata M and Takahasi C (1989) Research and development of coated fertilizer. In: Fertilizer, Present and Future. Symposium proc. Tokyo 1989, pp 78-100. Japanese Soc Soil Sci and Plant Nutr
no DOI — not checkedFry JD, Fuller OL and Maier FP (1991) Unreleased nitrogen in sulfur-coated urea and reactive layers coated urea following application to truth. In: Scheib RM (ed) Controlled release fertilizer workshop, TVA, 1991, pp 40-43. Alabama
no DOI — not checkedFWG - Fertilizer Working Group (1991) Nitrogen, Phosphate, and Potash Forecasts. Technical Paper no. 144. World Bank, Washington DC
no DOI — not checkedGivol M (1991) Controlled release fertilizers interaction with plants and soil. M.Sc. Faculty Agric. Eng. Technion-IIT, Haifa, Israel
no DOI — not checkedGlaser V, Stajer P, Vidensky J (1987) Simulace prubehu rozpousteni obalovanych prumyslovych hnojiv ve vode -II. Chemicky Prumysl 37: 353–355
no DOI — not checkedGoyal SS and Huffaker RC (1984) Nitrogen toxicity in plants. In: Hauck RD (ed) Nitrogen in crop production, pp 97–118. ASA, Madison, WI
no DOI — not checkedGreenwood DJ and Draycott A (1988) Recovery of fertilizer N by diverse vegetable crops: Processes and Models. In: Jenkinson DS and Smith KA (eds) Nitrogen efficiency in agricultural soils, pp 46-61
no DOI — not checkedHauck RD (1985) Slow release and bio-inhibitoramended nitrogen fertilizers. In: Engelstad OP (ed) Fertilizer technology and use, pp 293–322. Third ed. SSSA, Madison, WI
no DOI — not checkedHauck RD and Koshino M (1971) Slow-release and amended fertilizers. In: Olson RAet al. (eds) Fertilizer technology and use, pp 455–494. 2nd ed. SSSA, Madison, WI
no DOI — not checkedJSSSPN (1989) Fertilizer, Present and Future. Symposium proc. Tokyo 1989, pp 152. Japanese Soc. Soil Sci. and Plant Nutr
no DOI — not checkedKaap JD (1987) Implementing best management practices to reduce nitrate levels in north-east Iowa ground water, In: Proc. Agricultural Impacts on Ground Water, pp 412-426. Omaha, NE. Aug 1986
no DOI — not checkedKeeney DR and Follett RF (1991) Managing nitrogen for ground water quality and farm profitability: Overview and introduction. In: Follet RFet al. (eds) Managing nitrogen for ground water quality and farm profitability, pp 1–7. SSSA, Madison, WI
no DOI — not checkedKirk-Othmer (1980) Encyclopedia of Chemical Engineering. Vol 10. Fertilizers, pp 105–124. John Wiley and Sons, NY
no DOI — not checkedKuhlmann H and Engels T (1989) Nitrogen utilization in relation to N-fertilization. The fertilizer Society Proc. no. 287, London
no DOI — not checkedLandels SP (1991) U.S. markets for controlled-release fertilizers: Present size and value, projected demand, trends, and opportunities for new CRF products. In: Scheib RM (ed) Controlled release fertilizer workshop, TVA, 1991, pp 87-101. Alabama
no DOI — not checkedLindsay WL (1979) Chemical equilibria in soils. Chap 2. John Wiley and Sons, New York
no DOI — not checkedMarks HF (1989) A hundred years of British food and farming: A statistical survey. Britton DK (ed) Taylor and Francis, London
no DOI — not checkedMarshner H (1986) Mineral nutrition of higher plants. Academic Press, London
no DOI — not checkedNelson DW (1984) Effect of nitrogen excess on quality of food and fiber. In: Hauck RD (ed) Nitrogen in crop production, pp 643–661. ASA, Madison WI
no DOI — not checkedNielsen NE (1983) Plant parameters controlling the efficiency of nutrients uptake from soil. In: UN Econ. Comm. Europe. Efficient use of fertilizers in agriculture. Dev. Plant Soil Sci 10, pp 199–219. Kluwer Acadermic Publ, The Hague
no DOI — not checkedNovoa HFV and Nunez R (1974) Efficiency of five phosphate fertilizer sources in soils with different phosphate fixing capacities. Trop Agric 51: 235–245
no DOI — not checkedNye PH (1986) Acid-base changes in the rhizosphere. Adv Plant Nutr 2: 129–153
no DOI — not checkedOlson RA (1978) The indispensable role of nitrogen in agricultural production. pp 1-31
no DOI — not checkedRandall GW, Wells KL and Hanway JJ (1985) Modern techniques in fertilizer application. In: Hauck RD (ed) Fertilizer technology and use, pp 521–560. SSSA, Madison, WI
no DOI — not checkedSahrawat KL and Tandon HL (1993) Forms, properties and dissolution characteristics of slow release nitrogen fertilizers. Fert Res (in press)
no DOI — not checkedScheib RM (ed) (1991) Controlled release fertilizer workshop 1991. Proceedings TVA-NFERC, July 1991. Alabama
no DOI — not checkedSchnek M (1987) Increasing phosphorus solubility in Super Phosphate by mixing with Ammonium Sulfate. M. Sc. Thesis, Facul Agric Eng Technion-IIT, Haifa, Israel
no DOI — not checkedShaffer MJ, Halvorson AD and Pierce FJ (1991) Nitrate leaching and economic analysis package (NLEAP): Model description and application. In: Follet RFet al. (eds) Managing nitrogen for ground water quality and farm profitability, pp 285–322. SSSA, Madison, WI
no DOI — not checkedShavit U (1990) A model for solutes efflux from controlled release devices. M Sc Thesis. Faculty Agric Eng Tehnion-IIT, Haifa, Israel
no DOI — not checkedShaviv A, Givol M and Zaslavsky D (Forthcoming) Fertilization with a new type of CRF: Evaluation of agronomic and environmental advantages. The Dahlia Gredinger Memorial International Workshop on Controlled Release Fertilizers. Haifa, March 1993
no DOI — not checkedShaviv A, Nedan S and Hagin J (1992) Regulation of NH4-NO3 proportions in soil for increasing N fertilizers use efficiency and reducing pollution. CIEC symposium, 1990 Cyprus
no DOI — not checkedSmith JE and Beutler E (1966) Methaemoglobin formation and reduction in man and various animal species. Am J Public Health 62: 1045–1052
no DOI — not checkedSposito G (1989) The chemistry of soils. Oxford University Press, New York
no DOI — not checkedStangel PJ, Savant NK and Byrnes BH (1991) Potential of modified ureas for rice. International Symposium on Rice Research - New Frontiers, November 1990, Hyderabad, India
no DOI — not checkedTanaka K (1989) Agriculture crop nutrition and fertilizer. In: Fertilizer, Present and Future. Symposium proc. Tokyo 1989, pp 1-22. Japanese Soc Soil Sci and Plant Nutr
no DOI — not checkedUK Stratospheric Ozone Review Group (1987) Stratospheric Ozone. HMSO, London
no DOI — not checkedUnited Nations (1989) Populationa Studies, No. 98. United Nations, New York
no DOI — not checkedVereecken H, Vanclooster M and Swerls M (1990) A model for estimating of nitrogen leaching with regional applicability. In: Merckx Ret al. (eds) Fertilization and the environment, pp 250–262. Leuven University Press, Belgium
no DOI — not checkedWilson FN and Chem C (1988) Slow release true or false? A case study for control. Fertiliser Society of London, April 1988
no DOI — not checkedWHO (1985) Health hazards from nitrates in drinking water. Report on a WHO Meeting 5–9 March 1984, Copenhagen
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