Reduced river phosphorus following implementation of a lawn fertilizer ordinance

Lehman, John T.; Bell, Douglas W.; McDonald, Kahli E.

doi:10.1080/07438140903117217

Cited by 29 publications

(24 citation statements)

References 4 publications

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“…TP concentration deviation means were consistently below reference levels except at station A in August, and like DP, the differences were statistically significant in 9 of 15 comparisons. As presented in our original report (Lehman et al 2009), the statistically significant reductions occurred from June to September, and seemed more secure at stations B and F than at A, corresponding to larger influence of jurisdiction-influenced catchment area. The mean reductions recorded at A, B, and F from June to September for DP and TP were 23 and 11%, 30 and 21%, and 35 and 23%, respectively.…”

Section: Phosphorus Variablessupporting

confidence: 57%

“…Following Lehman et al (2009), the primary response variables of interest were SRP, DP, and TP. The analytes NO 3 , CDOM, SRSi, pH, and K 25 were included as nontarget or quasicontrol variables.…”

Section: Methodsmentioning

confidence: 99%

“…Sample analyses were identical to those described by Lehman et al (2009) and included SRP, DP, TP, soluble molybdate-reactive Si (SRSi), pH, and nitrate (NO 3 ). The SRP was measured as molybdate-reactive phosphate in filtrate; DP and TP were measured as SRP after first oxidizing filtrate (DP) or unfiltered water (TP) with potassium persulfate at 105 C for 1 h. Also measured were specific conductance at 25 C (K 25 , µS) and colored dissolved organic matter (CDOM) as UV absorbance at 254 nm.…”

Section: Field Sampling and Analysesmentioning

confidence: 99%

“…Detection at similar percentage reductions in dissolved P (DP) was predicted to take 2-3 years, and for soluble molybdate-reactive P (SRP) as long as 8 years. However, after just 1 year (2008), Lehman et al (2009) were able to report a statistically significant reduction in TP and a trend of decreasing concentration for DP. This report summarizes the results after 3 sampling seasons and concludes the experimental study.…”

mentioning

confidence: 93%

“…In an earlier report (Lehman et al 2009) we pointed out that many municipalities and state governments have adopted or are considering adoption of legislation that restricts the residential use of phosphorus-containing lawn fertilizers. The actions are typically based on environmental awareness that phosphorus (P) is not a limiting element in many terrestrial soils and that overapplication of P can contribute to eutrophication of surface waters.…”

mentioning

confidence: 99%

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Reduced additions to river phosphorus for three years following implementation of a lawn fertilizer ordinance

Lehman

Bell

Doubek

et al. 2011

Lake and Reservoir Management

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Section: Phosphorus Variablessupporting

confidence: 57%

Section: Methodsmentioning

confidence: 99%

Section: Field Sampling and Analysesmentioning

confidence: 99%

mentioning

confidence: 93%

mentioning

confidence: 99%

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Reduced additions to river phosphorus for three years following implementation of a lawn fertilizer ordinance

Lehman

Bell

Doubek

et al. 2011

Lake and Reservoir Management

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History of nutrient inputs to the northeastern United States, 1930–2000

Hale

Hoover

Wollheim

et al. 2013

Global Biogeochemical Cycles

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[1] Humans have dramatically altered nutrient cycles at local to global scales. We examined changes in anthropogenic nutrient inputs to the northeastern United States (NE) from 1930 to 2000. We created a comprehensive time series of anthropogenic N and P inputs to 437 counties in the NE at 5 year intervals. Inputs included atmospheric N deposition, biological N 2 fixation, fertilizer, detergent P, livestock feed, and human food. Exports included exports of feed and food and volatilization of ammonia. N inputs to the NE increased throughout the study period, primarily due to increases in atmospheric deposition and fertilizer. P inputs increased until 1970 and then declined due to decreased fertilizer and detergent inputs. Livestock consistently consumed the majority of nutrient inputs over time and space. The area of crop agriculture declined during the study period but consumed more nutrients as fertilizer. We found that stoichiometry (N:P) of inputs and absolute amounts of N matched nutritional needs (livestock, humans, crops) when atmospheric components (N deposition, N 2 fixation) were not included. Differences between N and P led to major changes in N:P stoichiometry over time, consistent with global trends. N:P decreased from 1930 to 1970 due to increased inputs of P, and increased from 1970 to 2000 due to increased N deposition and fertilizer and decreases in P fertilizer and detergent use. We found that nutrient use is a dynamic product of social, economic, political, and environmental interactions. Therefore, future nutrient management must take into account these factors to design successful and effective nutrient reduction measures.

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Nested‐Scale Nutrient Flux in a Mixed‐Land‐Use Urbanizing Watershed

Zeiger

Hubbart

2015

Hydrological Processes

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To improve quantitative understanding of mixed‐land‐use impacts on nutrient yields, a nested‐scale experimental watershed study design (n = 5) was applied in a 303(d), clean water act impaired urbanizing watershed of the lower Missouri River Basin, USA. From 2010 to 2013, water samples (n = 858 sample days per site) were analysed for total inorganic nitrogen (TIN‐N), nitrite (NO2–N) nitrate (NO3–N), ammonia (NH3–N), and total phosphorus (TP‐P). Annual, seasonal, and monthly flow‐weighted concentrations (FWCs) and nutrient yields were estimated. Mean nutrient concentrations were highest where agricultural land use comprised 58% of the drainage area (NH3 = 0.111 mg/l; NO2 = 0.045 mg/l; NO3 = 0.684 mg/l, TIN = 0.840 mg/l; TP = 0.127 mg/l). Average TP‐P increased by 15% with 20% increased urban land use area. Highly variable annual precipitation was observed during the study with highest nutrient yields during 2010 (record setting wet year) and lowest nutrient yields during 2012 (extreme drought year). Annual TIN‐N and TP‐P yields exceeded 10.3 and 2.04 kg ha−1 yr−1 from the agricultural dominated headwaters. Mean annual NH3–N, NO2–N, NO3–N, TIN‐N, and TP‐P yields were 0.742, 0.400, 4.24, 5.38, and 0.979 kg ha−1 yr−1, respectively near the watershed outlet. Precipitation accounted for the majority of the explained variance in nutrient yields (R2 values from 0.68 to 0.85). Nutrient yields were also dependent on annual precipitation of the preceding year (R2 values from 0.87 to 0.91) thus enforcing the great complexity of variable mixed‐land‐use mediated source‐sink nutrient yield relationships. Study results better inform land managers and best management practices designed to mitigate nutrient pollution issues in mixed‐land‐use freshwater ecosystems. Copyright © 2015 John Wiley & Sons, Ltd.

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Reduced river phosphorus following implementation of a lawn fertilizer ordinance

Cited by 29 publications

References 4 publications

Reduced additions to river phosphorus for three years following implementation of a lawn fertilizer ordinance

Reduced additions to river phosphorus for three years following implementation of a lawn fertilizer ordinance

History of nutrient inputs to the northeastern United States, 1930–2000

Nested‐Scale Nutrient Flux in a Mixed‐Land‐Use Urbanizing Watershed

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