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Artículos de revistas sobre el tema "Nutrient losses"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

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1

Illukpitiy, Prabodh, and Jason P. DeKoff. "An Economic Assessment of Nutrient Removal from Switchgrass Production." Research in Applied Economics 11, no. 2 (2019): 26. http://dx.doi.org/10.5296/rae.v11i2.14998.

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The on-site loss of nutrients due to biomass removal creates additional costs for ethanol production however this aspect has not been properly incorporated in economic analyses of biomass production and processing. This study investigates costs of on-site nutrient losses in switchgrass fields in Tennessee. The replacement cost methodology was applied to measure on-site cost of nutrient losses due to biomass removal and was based on the costs of replacing nutrients removed from the production site. The estimated costs for total on-site nutrient loss due to biomass removal show a substantial los

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2

Feller, M. C. "Relationships Between Fuel Properties and Slashburning-Induced Nutrient Losses." Forest Science 34, no. 4 (1988): 998–1015. http://dx.doi.org/10.1093/forestscience/34.4.998.

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Abstract The relationships between slash load, slash and forest floor consumption variables, and species origin of slash (slash type), and nutrient (N, P, S, K, Na, Mg, and Ca) losses to the atmosphere during slashburning, were studied by burning 50 plots, each 2.25m² in area. The plots contained known amounts of slash materials derived from four major southwestern British Columbia tree species (Tsuga heterophylla, Thuja plicata, Chamaecyparis nootkatensis, and Pseudotsuga menziesii) and were burned under different fire weather conditions. Nutrient losses (g/m²) decreased in the order: N &

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3

Mann, L. K., D. W. Johnson, D. C. West, et al. "Effects of Whole-Tree and Stem-Only Clearcutting on Postharvest Hydrologic Losses, Nutrient Capital, and Regrowth." Forest Science 34, no. 2 (1988): 412–28. http://dx.doi.org/10.1093/forestscience/34.2.412.

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Abstract Nutrient removal by sawlog or pulpwood harvest (SAW), and whole-tree harvesting (WTH) was determined for 11 forest stands located throughout the United States. Data from this study combined with previously published nutrient budgets indicated potential net losses of Ca and K at most sites without harvest, and net losses of N, P, K, and Ca with either SAW or WTH. Total stem biomass and nutrients were significantly correlated with total above-stump biomass, providing a means for estimating nutrient removals with WTH and SAW in commercial forests. Limited data from harvested stands indic

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4

Hargrave, A. P., and C. F. Shaykewich. "Rainfall induced nitrogen and phosphorus losses from Manitoba soils." Canadian Journal of Soil Science 77, no. 1 (1997): 59–65. http://dx.doi.org/10.4141/s95-034.

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Losses of total sediment phosphorus, total sediment nitrogen and dissolved nitrite, nitrate and ammonium resulting from natural rainfall erosion were studied in southern Manitoba during the summers of 1988–1990. Soils used were a Gretna clay, Leary sandy loam, Ryerson sandy clay and a Carroll clay loam. "Standard" erosion plots, i.e 22.13 m slope length, 4.6 m wide on a 9% slope were used. Crop management systems were 1) alfalfa, 2) corn, 3) wheat – minimum tillage, 4) wheat – conventional tillage, and 5) fallow. Nutrient losses averaged over the study period were greatest from the corn and fa

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5

Bertol, Ildegardis, Eloy Lemos Mello, Jean Cláudio Guadagnin, Almir Luis Vedana Zaparolli, and Marcos Roberto Carrafa. "Nutrient losses by water erosion." Scientia Agricola 60, no. 3 (2003): 581–86. http://dx.doi.org/10.1590/s0103-90162003000300025.

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Water erosion causes soil degradation, which is closely related to nutrient losses either in, the soluble form or adsorbed to soil particles, depending mainly on the adopted soil management system. This study was carried out in São José do Cerrito, SC, Brazil, between March 2000 and June 2001. The objective was to quantify available nitrogen, phosphorus, potassium, calcium and magnesium losses in water erosion obtained with simulated rainfall in the following soil management systems: conventional tillage with no-crop (bare soil) (BS), conventional tillage with soybean (CT), reduced tillage wit

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6

Kronvang, B., P. Græsbøll, S. E. Larsen, L. M. Svendsen, and H. E. Andersen. "Diffuse nutrient losses in Denmark." Water Science and Technology 33, no. 4-5 (1996): 81–88. http://dx.doi.org/10.2166/wst.1996.0491.

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Since 1989, nutrient loading of the Danish aquatic environment has been monitored in 270 Danish streams draining catchment areas differing in climate, physico-geographic and land usage. Diffuse nutrient loading from non-point sources (mainly agricultural) is now the main cause of eutrophication of the Danish aquatic environment; thus in 1993, diffuse sources accounted for 94% of riverine nitrogen loading and 52% of riverine phosphorus loading. Annual riverine total nitrogen (total-N) loading from diffuse sources during the period 1989-93 was on average 10 times greater in 66 small agricultural

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7

Wang, Hongxing, Dongsheng Chen, and Xiaomei Sun. "Nutrient Allocation to Different Compartments of Age-Sequence Larch Plantations in China." Forests 10, no. 9 (2019): 759. http://dx.doi.org/10.3390/f10090759.

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Increased demand for forest-derived biomass has led to more intensive harvesting practices. However, the export of large nutrient quantities with the harvested biomass may lead to the depletion of soil nutrients. Therefore, improved knowledge concerning macronutrient allocation (N, P, K, Ca, and Mg) to different components in forests along age sequences is crucial for their sustainable management. In this study, we quantified nutrient allocation to different ecosystem components, including trees, understorey, forest floor, and different soil depths within a chronosequence (6-, 15-, 23-, and 35

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8

Buescher, Ron. "Changes in Nutritional Value of Horticultural Food Crops Affected by Handling, Storage, and Processing." HortScience 31, no. 4 (1996): 697a—697. http://dx.doi.org/10.21273/hortsci.31.4.697a.

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Postharvest handling, storage, and processing greatly affect retention and bioavailability of nutrients in horticultural food crops. Although there are a few exceptions, concentrations of most nutrients are reduced by all postharvest operations. Losses of certain nutrients may range from 5% to 100%, depending on their chemical stability, solubility, and postharvest treatment. Therefore, the amount of a particular nutrient in a horticultural food at the time of harvest may not reflect the amount present when the raw or cooked food is consumed. Most vitamins are susceptible to oxidation catalyze

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9

Li, Hanzhi, Dengxing Fan, Jianzhi Niu, et al. "Effect of rock fragment cover on nutrient loss under varied rainfall intensities: a laboratory study." Hydrology Research 49, no. 2 (2017): 390–406. http://dx.doi.org/10.2166/nh.2017.026.

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Abstract Surface rock fragments retard overland flow discharge, reduce the runoff generation rate and soil erosion as well as nutrients loss. In Northwest China, a common method for minimizing water, soil, and nutrient losses is the use of rock fragment cover. We used lab stimulation testing to evaluate rock fragment cover efficacy for nutrient conservation. Nutrient losses were determined in both the runoff and sediments under three rain intensities (30, 60 and 90 mm·h−1), four rock fragment covers (0, 10, 20 and 30%) and a slope of 10°. The results showed that rock fragment cover significant

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10

Titus, Brian D., Bruce A. Roberts, and Keith W. Deering. "Nutrient removals with harvesting and by deep percolation from white birch (Betula papyrifera [Marsh.]) sites in central Newfoundland." Canadian Journal of Soil Science 78, no. 1 (1998): 127–37. http://dx.doi.org/10.4141/s97-044.

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The effects of conventional stem-only and whole-tree harvesting on nutrient losses in biomass removal and in leachate fluxes over a 3-yr period after cutting three white birch stands in central Newfoundland were determined. Losses of nutrients in biomass were proportionately greater with more intensive harvesting as tree components with higher nutrient concentrations (branches, foliage) were removed. Stem-only harvesting removed 126, 9, 51, 126 and 23 kg ha–1 of N, P, K, Ca and Mg in biomass, respectively. Whole-tree harvesting led to a 19% increase in biomass removal as compared to stem-only

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11

Mattson, Neil S., and Marc W. van Iersel. "Application of the “4R” Nutrient Stewardship Concept to Horticultural Crops: Applying Nutrients at the “Right Time”." HortTechnology 21, no. 6 (2011): 667–73. http://dx.doi.org/10.21273/horttech.21.6.667.

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The 4R nutrient stewardship framework presents four concepts to consider when applying fertilizers in a responsible matter; the “right source” of nutrients should be applied at the “right rate” during the “right time” and supplied to the “right place” to ensure their uptake. In this article, we provide ideas to consider when attempting to provide nutrients at the right time. When nutrients are applied at a time when they are not required by the plant, the result can be economic and environmental losses. Oversupply relative to plant demand can result in losses of applied nutrients because of le

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12

Hayes, Emma, Suzanne Higgins, Josie Geris, and Donal Mullan. "Grassland Reseeding: Impact on Soil Surface Nutrient Accumulation and Using LiDAR-Based Image Differencing to Infer Implications for Water Quality." Agriculture 12, no. 11 (2022): 1854. http://dx.doi.org/10.3390/agriculture12111854.

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Long-term phosphorus (P) accumulation in agricultural soils presents a challenge for water quality improvement. P is commonly elevated in soils managed for intensive livestock production due to repeated overapplication of slurry and fertilisers. High legacy nutrient accumulations result in poor water quality via transport pathways such as surface runoff, subsurface drainage, and soil erosion. To achieve environmental water quality targets, improved management strategies are required for targeting and reducing excess agricultural P sources. Reseeding of old swards is known to improve grassland

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13

Yao, Yiwen, Quanhou Dai, Ruxue Gao, Yixian Gan, and Xingsong Yi. "Effects of rainfall intensity on runoff and nutrient loss of gently sloping farmland in a karst area of SW China." PLOS ONE 16, no. 3 (2021): e0246505. http://dx.doi.org/10.1371/journal.pone.0246505.

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Nutrient losses from sloping farmland in karst areas lead to the decline in land productivity and nonpoint source pollution. A specially tailored steel channel with an adjustable slope and underground hole fissures was used to simulate the microenvironment of the "dual structure" of the surface and underground of sloping farmland in a karst area. The artificial rainfall simulation method was used to explore the surface and underground runoff characteristics and nutrient losses from sloping farmland under different rainfall intensities. The effect of rainfall intensity on the nutrient loss of f

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14

Granstedt, Artur. "The potential for Swedish farms to eliminate the use of artificial fertilizers." American Journal of Alternative Agriculture 6, no. 3 (1991): 122–31. http://dx.doi.org/10.1017/s0889189300004070.

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AbstractThis paper discusses data on plant-nutrient conservation in Sweden between 1950 and 1980 and on plant-nutrient balances in conventional and alternative farming. The amounts of plant nutrients supplied in the form of artificial fertilizer in Sweden increased severalfold between 1950 and 1980. The amounts of N and P applied were four times higher than those recovered in agricultural products. This difference not only represents a loss to farmers but also a burden on the environment. This problem is a consequence of the increased separation of crop management from animal husbandry in Swed

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15

Gross, C. M., J. S. Angle, and M. S. Welterlen. "Nutrient and Sediment Losses from Turfgrass." Journal of Environmental Quality 19, no. 4 (1990): 663–68. http://dx.doi.org/10.2134/jeq1990.00472425001900040006x.

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16

Bjorneberg, D. L., D. T. Westermann, and J. K. Aase. "Nutrient losses in surface irrigation runoff." Journal of Soil and Water Conservation 57, no. 6 (2002): 524–29. https://doi.org/10.1080/00224561.2002.12457488.

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17

van Peer, A. "THE USE OF COMBINED NUTRIENT SYSTEMS TO CONTROL NUTRIENT LOSSES." Acta Horticulturae, no. 401 (October 1995): 347–50. http://dx.doi.org/10.17660/actahortic.1995.401.41.

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18

Hansen, N. E., D. M. Vietor, C. L. Munster, R. H. White, and T. L. Provin. "Runoff and Nutrient Losses from Constructed Soils Amended with Compost." Applied and Environmental Soil Science 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/542873.

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Composted organic materials used to stabilize roadside embankments in Texas promote rapid revegetation of soils disturbed by construction activities. Yet, adding compost to soil may increase total and soluble plant nutrients available for loss in runoff water. Composted municipal biosolids and dairy manure products were applied to soils in Texas according to prescribed Texas Department of Transportation specifications for stabilizing roadside soils. The specifications included a method for incorporating compost into soils prior to seeding or applying a compost and woodchip mix over a disturbed

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19

SHARMA, R. C., and P. BANIK. "Effect of integrated nutrient management on baby corn–rice cropping system: economic yield, system productivity, nutrient-use efficiency andsoil nutrient balance." Indian Journal of Agricultural Sciences 82, no. 3 (2012): 220–4. http://dx.doi.org/10.56093/ijas.v82i3.15941.

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The study was conducted to estimate the nutrient-use efficiency and soil nutrient balance of integrated nutrient management, five combinations of organic and inorganic sources of nutrients. Both partial factor productivity and agronomic- use efficiency of nitrogen, phosphorus and potassium was recorded maximum in F3 (70% RD of NPK through inorganic fertilizers + 30% N through FYM), F2 (70% RD of NPK through inorganic fertilizers + 30% N through vermicompost) and F1 (recommended dose (RD) of NPK (150:26:33) through fertilizers), respectively. Apparently recovery efficiency for N and K was highe

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20

Gómez-Rey, M. X., A. Couto-Vázquez, S. García-Marco, J. A. Vega, and S. J. González-Prieto. "Reduction of nutrient losses with eroded sediments by post-fire soil stabilisation techniques." International Journal of Wildland Fire 22, no. 5 (2013): 696. http://dx.doi.org/10.1071/wf12079.

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After an experimental fire in steep shrubland in a temperate–humid region (north-west Spain), the effects of two post-fire stabilisation treatments (grass seeding and straw mulching) on the chemical properties of eroded sediments, and the amount of nutrients lost with them, were evaluated relative to control burnt soil, over a period of 13 months. Total C and N concentrations, and δ13C, indicated that sediments were mainly contributed by charred plant and litter material. The highest concentrations of extractable base cations in the sediments occurred during the first 3 months following fire,

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21

Gillon, D., V. Gomendy, C. Houssard, J. Marechal, and JC Valette. "Combustion and Nutrient Losses During Laboratory Burns." International Journal of Wildland Fire 5, no. 1 (1995): 1. http://dx.doi.org/10.1071/wf9950001.

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The aim of this study was to assess the effects on combustion characteristics, and their consequences on nutrient losses, of (1) the change in load and packing ratio of the fuel bed, and (2) the change in fuel moisture content. Eighty-one experimental burns were carried out, on a test bench in the laboratory; the fuel was composed of needles and twigs of Pinus pinaster. Two levels of fuel load an dpacking ratio (8t ha-1 needles, packing ratio of 0.040; and 16t ha-1 twigs and needles, packing ratio of 0.066) were compared at constant moisture content (6%); and four levels of moisture content(6%

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22

CHIURCIU, Irina-Adriana, Daniela DANA, Tore KROGSTAD, Aurelia Ioana CHEREJI, Valentina VOICU, and Andreea Roxana FIRATOIU. "STUDY ON NUTRIENT LOSSES IN THE STANDARD EROSION CONTROL PLOTS FROM PREAJBA EXPERIMENTAL POINT, GORJ." "Annals of the University of Craiova - Agriculture Montanology Cadastre Series " 54, no. 1 (2025): 355–59. https://doi.org/10.52846/aamc.v54i1.1577.

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Recent studies highlight that controlling nutrient emissions from agricultural sources remains one of the most pressing environmental challenges in safeguarding water bodies. The excessive release of nutrients, particularly nitrogen and phosphorus, can lead to the eutrophication of aquatic ecosystems, disrupting water quality and biodiversity. In this context, the present study focuses on the systematic monitoring of agrochemical soil indicators in designated standard plots at the Preajba experimental point in Gorj County. The primary objective is to evaluate and control nutrient losses origin

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23

Prasad, Laxmi R., Anita M. Thompson, Francisco J. Arriaga, Lydia Koropeckyj-Cox, and Yongping Yuan. "Effectiveness of Residue and Tillage Management on Runoff Pollutant Reduction from Agricultural Areas." Journal of the ASABE 66, no. 6 (2023): 1341–54. http://dx.doi.org/10.13031/ja.15518.

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Highlights No-till and no-till residue systems were effective in reducing runoff particulate and total nutrients but increased dissolved nutrients. Maintaining &gt;30% residue cover reduced most runoff constituents, irrespective of no-till or tillage. No-till-residue prevented runoff nutrient losses and benefitted farm revenue by avoiding tillage. Abstract. Reduced tillage management conservation practices (No-till and Reduced-till) are widely adopted in agriculture; however, understanding their overall effectiveness for water quality protection is challenging. A meta-analysis was conducte

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lital, Arvo, Enn Loigu, and Nils Vagstad. "Nutrient Losses and N & P Balances in Small Agricultural Watersheds in Estonia." Hydrology Research 34, no. 5 (2003): 531–42. http://dx.doi.org/10.2166/nh.2003.0023.

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The paper deals with nutrient runoff monitoring results and calculated nutrient budgets on catchment level in small agricultural watersheds in Estonia. A special programme for monitoring of nutrient losses was initiated and a network of monitoring stations, equipped with data-loggers and suitable devices for continuous flow measurement and flow-proportional automatic water sampling were established in Estonia in the mid-1990s. The research methodology is harmonized with the Nordic countries as well as with the other Baltic countries. The results indicate that nutrients losses are relatively lo

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25

Hallett, R. A., and J. W. Hornbeck. "Managing Oak and Pine Stands on Outwash Sands: Protecting Plant Nutrients." Northern Journal of Applied Forestry 17, no. 2 (2000): 57–61. http://dx.doi.org/10.1093/njaf/17.2.57.

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Abstract In New England, red oak and white pine forests growing on sandy outwash sites are susceptible to nutrient losses due to inherently low nutrient capitals and/or nutrient depletion by past activities such as farming, fire, and intensive harvesting. Key nutrients such as calcium (Ca),magnesium (Mg), and potassium (K) are removed with biomass during harvesting operations, and are lost to increased leaching and erosion during and immediately after logging. In these forests, the highest base saturation or concentration of plant-available Ca, Mg, and K(63 to 92%) is found in the O horizon. A

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Jones, Michael G., R. Willem Vervoort, and Julie Cattle. "Nutrient losses under simulated rainfall from pasture plots in the Great Lakes District, New South Wales." Soil Research 47, no. 6 (2009): 555. http://dx.doi.org/10.1071/sr08116.

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Understanding the process by which nutrients and solids enter waterways from pastures in the Great Lakes district, New South Wales, Australia, may assist in maintaining water quality to ensure ongoing environmental and economic sustainability of the region. Rainfall simulations, using a 100-year return storm event, were conducted to determine nutrient and suspended solid concentrations in the runoff of 8 pasture sites in 3 of the catchments in the district. On 5 of the 8 sites, considerable concentrations of N or P were mobilised during the simulated rainfall event, but average nutrient concen

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Belillas, CM, and MC Feller. "Relationships Between Fire Severity and Atmospheric and Leaching Nutrient Losses in British Columbia's Coastal Western Hemlock Zone Forests." International Journal of Wildland Fire 8, no. 2 (1998): 87. http://dx.doi.org/10.1071/wf9980087.

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The relationships between fire severity and fire-induced nutrient losses to the atmosphere and through soil leaching were investigated using small (4m2) plots in logging slash. The study utilized (Pseudotsuga menziesii - Tsuga heterophylla - Thuja plicata) slash in southwestern British Columbia, Canada, in an area where overland flow was negligible. Twenty-two plots containing a range of slash fuel loads were burned, nutrient (N, P, S, K, Mg, and Ca) losses to the atmosphere were measured, and nutrient (N, P, K, ME, and Ca) losses in soil leachate were quantified for the first year postburn. F

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Scagel, Carolyn F., Guihong Bi, Leslie H. Fuchigami, and Richard P. Regan. "Nutrient Uptake and Loss by Container-grown Deciduous and Evergreen Rhododendron Nursery Plants." HortScience 46, no. 2 (2011): 296–305. http://dx.doi.org/10.21273/hortsci.46.2.296.

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The influence of nitrogen (N) fertilizer application on plant allocation, uptake, and demand for other essential nutrients was evaluated from May 2005 to Feb. 2006 in evergreen Rhododendron ‘P.J.M. Compact’ (PJM) and ‘English Roseum’ (ER) and deciduous Rhododendron ‘Gibraltar’ (AZ) grown in containers filled with soilless substrate. Net nutrient uptake and losses were calculated using piecewise regression and uptake efficiency, root absorption capacity, aboveground demand, nutrient use efficiency, and uptake ratios between N and other nutrients (N ratios) were calculated using net uptake betwe

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Baulch, Helen M., Jane A. Elliott, Marcos R. C. Cordeiro, Don N. Flaten, David A. Lobb, and Henry F. Wilson. "Soil and water management: opportunities to mitigate nutrient losses to surface waters in the Northern Great Plains." Environmental Reviews 27, no. 4 (2019): 447–77. http://dx.doi.org/10.1139/er-2018-0101.

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The Northern Great Plains is a key region to global food production. It is also a region of water stress that includes poor water quality associated with high concentrations of nutrients. Agricultural nitrogen and phosphorus loads to surface waters need to be reduced, yet the unique characteristics of this environment create challenges. The biophysical reality of the Northern Great Plains is one where snowmelt is the major period of nutrient transport, and where nutrients are exported predominantly in dissolved form. This limits the efficacy of many beneficial management practices (BMPs) commo

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Machado, Roriz Luciano, Alexander Silva de Resende, Eduardo Francia Carneiro Campello, José Arimathéa Oliveira, and Avílio Antônio Franco. "Soil and nutrient losses in erosion gullies at different degrees of restoration." Revista Brasileira de Ciência do Solo 34, no. 3 (2010): 945–54. http://dx.doi.org/10.1590/s0100-06832010000300036.

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The most advanced stage of water erosion, the gully, represents severe problems in different contexts, both in rural and urban environments. In the search for a stabilization of the process in a viable manner it is of utmost importance to assess the efficiency of evaluation methodologies. For this purpose, the efficiency of low-cost conservation practices were tested for the reduction of soil and nutrient losses caused by erosion from gullies in Pinheiral, state of Rio de Janeiro. The following areas were studied: gully recovered by means of physical and biological strategies; gullies in recov

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Lu, Shuning, Chong Yao, and Faqi Wu. "Effects of Counter Tillage and Slope Gradient on Nutrient Losses on Sloping Farmland." Sustainability 15, no. 3 (2023): 2019. http://dx.doi.org/10.3390/su15032019.

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Counter tillage is a typical cultivation practice on the Loess Plateau, which can influence the soil erosion process by intercepting runoff and increasing infiltration. However, few studies have investigated the mechanisms of nutrient losses associated with counter tillage. This study was conducted to reveal the effects of counter tillage and slope gradient on the soil nutrient loss mechanism on sloping farmland. In this study, the rainfall simulation was conducted with a rainfall intensity of 90 mm.h−1 and with five slope gradients (5.24%, 8.75%, 17.63%, 26.79%, 36.40%). The runoff plots invo

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Shukla, S., B. J. Boman, R. C. Ebel, P. D. Roberts, and E. A. Hanlon. "Reducing Unavoidable Nutrient Losses from Florida's Horticultural Crops." HortTechnology 20, no. 1 (2010): 52–66. http://dx.doi.org/10.21273/horttech.20.1.52.

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Despite efforts to optimize water and nutrient inputs to Florida's vegetable and fruit crops, the sandy soils, shallow water table, and tropical climate of Florida result in nutrient leaching losses that are unavoidable. Water quantity and quality management strategies that can reduce these nutrient losses from Florida's horticultural crops were reviewed and research needs for quantifying their effectiveness were identified. The water quantity management strategies included water table management for irrigation, drainage management, detention of runoff and drainage, and summer flooding. In add

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Bechmann, Marianne E., and Frederik Bøe. "Soil Tillage and Crop Growth Effects on Surface and Subsurface Runoff, Loss of Soil, Phosphorus and Nitrogen in a Cold Climate." Land 10, no. 1 (2021): 77. http://dx.doi.org/10.3390/land10010077.

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Most studies on the effects of tillage operations documented the effects of tillage on losses through surface runoff. On flat areas, the subsurface runoff is the dominating pathway for water, soil and nutrients. This study presents results from a five-year plot study on a flat area measuring surface and subsurface runoff losses. The treatments compared were (A) autumn ploughing with oats, (B) autumn ploughing with winter wheat and (C) spring ploughing with spring barley (n = 3). The results showed that subsurface runoff was the main source for soil (67%), total phosphorus (76%), dissolved reac

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Coblinski, João Augusto, Nerilde Favaretto, Gabriel Democh Goularte, Jeferson Dieckow, Anibal de Moraes, and Luiz Claudio de Paula Souza. "Water, Soil and Nutrients Losses by Runoff at Hillslope Scale in Agricultural and Pasture Production in Southern Brazil." Journal of Agricultural Science 11, no. 6 (2019): 160. http://dx.doi.org/10.5539/jas.v11n6p160.

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Agricultural activity, if not well managed, is an important source of water pollution mainly by surface runoff. The aim of this study was to evaluate losses of water, soil and soluble nutrient (phosphorus, nitrogen and carbon) via runoff in large plots (hillslope from 3,000 to 11,000 m2) at slope of 4 to 5% in annual crops (corn and sunflower) and pasture systems under no-tillage and no-pesticides. The study was carried out at the Canguiri Experimental Farm of the Federal University of Paran&aacute;, Southern Brazil, in soil classified as Ferralsol in three systems (crop, pasture and crop-

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Flis, Sally. "4R nutrient stewardship and nitrous oxide losses." Crops & Soils 51, no. 1 (2018): 10–12. http://dx.doi.org/10.2134/cs2018.51.0106.

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Blomqvist, Anna. "How can stakeholder participation improve European watershed management: the Water Framework Directive, watercourse groups and Swedish contributions to Baltic Sea eutrophication." Water Policy 6, no. 1 (2004): 39–52. http://dx.doi.org/10.2166/wp.2004.0003.

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Nutrient losses from agricultural land constitute an important part of the total flow of nutrients to lakes and seas in Sweden and the Baltic region. With the Water Framework Directive, to be implemented shortly throughout Europe, emphasis is increasing on the role of stakeholder participation and decentralisation of various responsibilities from authorities to groups in the civil society. This paper investigates a Swedish case where local watercourse groups (WCGs) have formed in order to be involved more actively in the efforts to reduce nutrient losses from agricultural lands. This paper pre

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Pomar, Candido, and Aline Remus. "242 The Impact of Feed Formulation and Feeding Methods on Pig and Poultry Production on the Environment." Journal of Animal Science 100, Supplement_3 (2022): 124. http://dx.doi.org/10.1093/jas/skac247.237.

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Abstract Dietary energy and nutrient losses associated with its conversion into animal products increase production costs and contribute to the environmental footprint of farms with the excessive application of nitrogen, phosphorus, or trace minerals from manure or carbon and methane losses. Formulating diets with the appropriate levels of minerals and amino acids can help improve dietary protein and energy efficiency and reduce nutrient losses. For example, an 8% reduction in dietary crude protein in pig feeds is estimated to increase nitrogen efficiency by more than 50%, while costing 11% le

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Vagstad, N., P. Stålnacke, H. E. Andersen, et al. "Regional variations in diffuse nitrogen losses from agriculture in the Nordic and Baltic regions." Hydrology and Earth System Sciences 8, no. 4 (2004): 651–62. http://dx.doi.org/10.5194/hess-8-651-2004.

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Abstract. This paper describes nitrogen losses from, and the characteristics of, 35 selected catchments (12 to 2000 ha) in the Nordic and Baltic countries. Average annual losses of N in 1994–1997 ranged from 5 to 75 kg ha-1, generally highest and characterised by significant within-country and interannual variations, in Norway and the lowest losses were observed in the Baltic countries. An important finding of the study is that the average nutrient losses varied greatly among the studied catchments. The main explanations for this variability were water runoff, fertiliser use (especially the am

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Behrendt, Horst. "Inventories of point and diffuse sources and estimated nutrient loads - a comparison for different river basins in Central Europe." Water Science and Technology 33, no. 4-5 (1996): 99–107. http://dx.doi.org/10.2166/wst.1996.0493.

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A comparison of the estimated emissions (input) with the measured loads at monitoring stations (output) is presented for the large Rivers Rhine, Elbe and its main tributaries and for the River Warnow, a smaller river in the north-east part of Germany. The comparison shows that the discrepancies between the estimated emissions and the measured load is small for the Rhine and its main tributaries, Mosel, Neckar and Main. Large discrepancies were found for the Elbe and its main tributaries. For all investigated river systems a strong relationship exists between the quotient of measured nutrient l

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Kellman, Martin. "Nutrient retention by tropical ecosystems: soil adsorption and plant absorption as synergistic processes." Journal of Tropical Ecology 18, no. 6 (2002): 877–95. http://dx.doi.org/10.1017/s0266467402002572.

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Laboratory and growth-chamber experiments were used to evaluate whether there was evidence for nutrient retention by tropical terrestrial ecosystems being a two-stage process involving first soil adsorption and then plant absorption. Quartz sand with and without Fe and Al oxide coatings were treated with nutrient solution, then subjected to a leaching regime that simulated early wet-season conditions at a tropical location. Nutrient cations applied were rapidly lost in the initial leaches from quartz sand without oxide coatings, but showed a more gradual loss from oxide-coated sand, indicating

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Kurz, I., H. Tunney, and C. E. Coxon. "The impact of agricultural management practices on nutrient losses to water: data on the effects of soil drainage characteristics." Water Science and Technology 51, no. 3-4 (2005): 73–81. http://dx.doi.org/10.2166/wst.2005.0577.

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Against the background of increasing nutrient concentrations in Irish water bodies, this study set out to gain information on the potential of agricultural grassland to lose nutrients to water. Overland flow, flow from artificial subsurface drains and stream flow were gauged and sampled during heavy rainfall events. Dissolved reactive phosphorus (DRP), potassium (K), total ammonia (TA), and total oxidised nitrogen (TON) were measured in water samples. When the nutrient concentrations in water were examined in relation to the grassland management practices of the study catchments it emerged tha

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42

Marley, C. L., R. Fychan, M. D. Fraser, R. Sanderson, and R. Jones. "The effect of feeding ensiled alternative forages compared with ensiled ryegrass on excreta losses from growing lambs." Proceedings of the British Society of Animal Science 2009 (April 2009): 162. http://dx.doi.org/10.1017/s1752756200030015.

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An experiment investigated the effects of using ensiled alternative forages compared with ensiled ryegrass on lamb productivity, nutrient use efficiency and total excreta losses in a lamb finishing system. Lambs offered alternative forages had a higher liveweight gain and nitrogen use efficiency than lambs offered ryegrass silage (P < 0.001) (Marley et al., 2007). However, balancing the input and output of nutrients within the farm system is critical to ensure both short-term productivity and long-term sustainability, as producers aim to establish whole-farm nutrient balance plans and reduc

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Liu, J. X., D. Q. Zhang, G. Y. Zhou, B. Faivre-Vuillin, Q. Deng, and C. L. Wang. "CO<sub>2</sub> enrichment increases nutrient leaching from model forest ecosystems in subtropical China." Biogeosciences Discussions 5, no. 3 (2008): 2679–706. http://dx.doi.org/10.5194/bgd-5-2679-2008.

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Abstract. The effect of high atmospheric CO2 concentrations on the dynamics of mineral nutrient is not well documented, especially for subtropical China. We used model forest ecosystems in open-top chambers to study the effects of CO2 enrichment alone and together with N addition on the dynamics of soil cations and anions. Two years of exposure to a 700 ppm CO2 atmospheric concentration resulted in increased annual nutrient losses by leaching below 70 cm soil profile. Compared to the control, net Mg2+ losses increased by 385%, K+ by 223%, Ca2+ by 167% and N-NO3- by 108%, respectively. Increase

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Liu, J. X., D. Q. Zhang, G. Y. Zhou, B. Faivre-Vuillin, Q. Deng, and C. L. Wang. "CO<sub>2</sub> enrichment increases nutrient leaching from model forest ecosystems in subtropical China." Biogeosciences 5, no. 6 (2008): 1783–95. http://dx.doi.org/10.5194/bg-5-1783-2008.

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Abstract. The effect of high atmospheric CO2 concentrations on the dynamics of mineral nutrient is not well documented, especially for subtropical China. We used model forest ecosystems in open-top chambers to study the effects of CO2 enrichment alone and together with N addition on the dynamics of soil cations and anions. Two years of exposure to a 700 ppm CO2 atmospheric concentration resulted in increased annual nutrient losses by leaching below 70 cm soil profile. Compared to the control, net Mg2+ losses increased by 385%, K+ by 223%, Ca2+ by 167% and NO3−-N by 108%, respectively. Increase

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45

Fanjaniaina, M. L., J. Larvy Delarivière, P. Salgado, E. Tillard, L. Rabeharisoa, and T. Becquer. "Biomass harvesting leads to soil acidification: a study of mixed crop–livestock farming systems in Madagascar." Crop and Pasture Science 72, no. 3 (2021): 236. http://dx.doi.org/10.1071/cp20499.

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Soil acidification and declining fertility are widespread in sub‐Saharan Africa. Nutrient depletion is mainly related to nutrient mining driven by biomass removal without replenishment of nutrients through use of fertilisers. Concomitant acidification is due to the high ash alkalinity of harvested biomass. We determined the nutrient content and ash alkalinity of biomass of the main crops produced in smallholder mixed crop–livestock farming systems in the Malagasy Highlands of Madagascar and calculated the soil acidification/alkalinisation occurring through biomass transfer. Samples of rice and

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Schoenau, J. J., and J. G. Davis. "Optimizing soil and plant responses to land-applied manure nutrients in the Great Plains of North America." Canadian Journal of Soil Science 86, no. 4 (2006): 587–95. http://dx.doi.org/10.4141/s05-115.

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Animal manures are recognized as valuable sources of plant nutrients in cropping systems and also play a role in soil improvement through the input of organic matter. Using recent research examples from Saskatchewan and Colorado, this paper covers beneficial management practices for effective recycling of manure nutrients applicable to the Great Plains region of North America. Challenges in using animal manures as fertilizers include low nutrient content per unit weight, variability and availability of nutrient content, and a balance of available nutrients that often does not meet the relative

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Miettinen, Asko. "The effectiveness and feasibility of economic incentives of input control in the mitigation of agricultural water pollution." Agricultural and Food Science 2, no. 6 (1993): 453–63. http://dx.doi.org/10.23986/afsci.72670.

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Agricultural water pollution in Finland is mainly caused by nutrient losses from fields. Nutrient losses can be mitigated, e.g., by changing management practices and by plant rotation. Adoption of the necessary measures may be voluntary, but economic incentives can also be used. Nutrient losses can be regulated, e.g., by incentives to decrease the use of fertilizers. Economic incentives include a change in product prices, an input tax or an input quota. So far an input tax has been applied in Finnish agriculture. The effectiveness and feasibility of these policy measures on the farm can be ass

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Teixeira, Gelza Carliane Marques, Renato de Mello Prado, Kamilla Silva Oliveira, Antonio Carlos Buchelt, Antonio Márcio Souza Rocha, and Michelle de Souza Santos. "Nutritional deficiency in scarlet eggplant limits its growth by modifying the absorption and use efficiency of macronutrients." PLOS ONE 16, no. 6 (2021): e0252866. http://dx.doi.org/10.1371/journal.pone.0252866.

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The intensity damages caused by nutritional deficiency in growing plants can vary with nutrients. The effects caused by nutrient omission in the plant nutritional efficiency in relation to the absorption and use of the missing nutrient, and the reasons why these damages reflect in other nutrients have not yet been reported in the culture of scarlet eggplant. A better understanding of the nutritional mechanisms involved may clarify why certain nutrients cause greater limitations than other during plants growth. Thus, this study was designed with the aim of evaluating the damages caused by macro

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Edwards, Pamela J., and Karl W. J. Williard. "Efficiencies of Forestry Best Management Practices for Reducing Sediment and Nutrient Losses in the Eastern United States." Journal of Forestry 108, no. 5 (2010): 245–49. http://dx.doi.org/10.1093/jof/108.5.245.

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Abstract Quantifying the effects of forestry best management practices (BMPs) on sediment and nutrient loads is a critical need. Through an exhaustive literature search, three paired forested watershed studies in the eastern United States were found that permitted the calculation of BMP efficiencies—the percent reduction in sediment or nutrients achieved by BMPs. For sediment, BMP efficiencies ranged from 53 to 94% during harvest and up to 1 year after harvesting. For nutrients, BMP efficiencies were higher for total nitrogen (60-80%) and phosphorus (85-86%), which included particulate and sed

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Smith, D. R., S. J. Livingston, B. W. Zuercher, M. Larose, G. C. Heathman, and C. Huang. "Nutrient losses from row crop agriculture in Indiana." Journal of Soil and Water Conservation 63, no. 6 (2008): 396–409. http://dx.doi.org/10.2489/jswc.63.6.396.

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