WWW.DISSERTATION.XLIBX.INFO
FREE ELECTRONIC LIBRARY - Dissertations, online materials
 
<< HOME
CONTACTS



Pages:     | 1 |   ...   | 11 | 12 || 14 | 15 |   ...   | 17 |

«A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Crop, Soil, and Environmental Sciences ...»

-- [ Page 13 ] --

McLeod, R.V., and R.O. Hegg. 1984. Pasture runoff water quality from application of inorganic and organic nitrogen sources. J. Environ. Qual. 13:122-126.

Mulvaney, R.L. 1996. Nitrogen-Inorganic forms, p. 1123-1184. In D.L. Sparks (ed.) Methods of soil analysis. Agronomy 9. ASA-SSSA, Madison, WI.

National Agricultural Statistics Service. 2006. Arkansas agricultural overview [Online].

Available at http://www.nass.usda.gov/Statistics_by_State/Ag_Overview/AgOverview_AR.pd f (accessed 9 July 2007; verified 16 July 2007). USDA-Natl. Agric. Statistics Serv. Washington, D.C.

National Phosphorus Project Protocol. 2008. National research project for simulated rainfall - Surface runoff studies [Online]. Available at http://www.seral 7.ext.vt.edu/Documents/National_P_protocol.pdf (accessed 2 July 2006; verified 4 Feb. 2008).

Northwest Arkansas Conservation Authority. 2003. Regional biosolids management projects: Preliminary engineering report. NACA, Fayetteville, AR.

Ojeda, G., D. Tarrason, O. Ortiz, and J.M. Alcaniz. 2006. Nitrogen losses in runoff waters from a loamy soil treated with sewage sludge. Agric. Ecosyst. Environ.

117:49-56.

Pote, D.H., and T.C. Daniel. 2000. Analyzing for total phosphorus and total dissolved phosphorus in water samples. S. Coop. Ser. Bull. 396. North Carolina State Univ., Raleigh, NC.

Pote, D.H., T.C. Daniel, A.N. Sharpley, P.A. Moore, Jr., D.R. Edwards, and D.J. Nichols.

1996. Relating extractable soil phosphorus to phosphorus losses in runoff. Soil Sci. Soc. Am. J. 60:855-859.

SAS Institute. 2003. The SAS system for Windows. Release 9.1. SAS Inst., Cary, NC.

Sharpley, A.N., S.C. Chapra, R. Wedepohl, J.T. Sims, T.C. Daniel, and K.R. Reddy.

1994. Managing agricultural phosphorus for protection of surface waters: Issues and options. J. Environ. Qual. 23:437-451.

–  –  –

Slaton, N.A., K.B. Brye, M.B. Daniels, T.C. Daniel, R.J. Norman, and D.M. Miller.

2004. Nutrient input and removal trends for agricultural soils in nine geographic regions in Arkansas. J. Environ. Qual. 33:1606-1615.

Tabil, L.G., Jr., S. Sokhansanj, and R.T. Tyler. 1997. Performance of different binders during alfalfa pelletizing. Can. Agric. Eng. 39(1): 17-23.

Thomas, G.W. 1996. Soil pH and soil acidity, p. 475-490. In D.L. Sparks (ed.) Methods of soil analysis. Agronomy 9. ASA-SSSA, Madison, WI.

Thomas, G.W., and R.E. Phillips. 1979. Consequences of water movement in macropores. J. Environ. Qual. 8(2): 149-152.

Toor, G.S., B.E. Haggard, M.S. Reiter, T.C. Daniel, and A.M. Donoghue. 2007.

Phosphorus solubility in poultry litters and granulates: Influence of litter treatments and extraction ratios. Trans. ASABE. 50(2):533-542.

USEPA. 2000. The quality of our nation's water. A summary of the National Water Quality Inventory: 1998 Report to Congress. EPA 841-S-00-001. USEPA Office of Water. U.S. Gov. Printing Office, Washington, D.C.

USEPA. 2007. EPA test methods [Online]. Available at http://www.epa.gov/epahome/index/index.htm (accessed 3 Aug. 2006; verified 18 Aug. 2007). USEPA. Washington, D.C.

Veverka, J., and R. Hinkle. 2001. A comparison of liquid binders for limestone pelletizing [Online]. Proc. 27l Inst. Briquetting and Agglomeration, Biennial Conf, Providence, RI. Available at http://www.pelletizedlimestone.com/library/liquid-binders.pdf (accessed 13 July 2007; verified 16 July 2007). Mars Mineral, Inc. Mars, Pennsylvania.

Vietor, D.M., E.N. Griffith, R.H. White, T.L. Provin, J.P. Muir, and J.C. Read. 2002.

Export of manure phosphorus and nitrogen in turfgrass sod. J. Environ. Qual.

31:1731-1738.

Wolfe, K., C. Ferland, and J. McKissick. 2002. The feasibility of operating a poultry litter pelletizing facility in south Georgia. FR-02-08. Center Agribusiness & Economic Dev., Univ. of Georgia; Athens.

–  –  –

Urea-TSP 6.8 de 283 d tPoultry litter + urea (PLU), PLU + dicyandiamide (DCD) (PLUDCD), PLU + biosolids (PLUB), PLUB + DCD (PLUBDCD), lignosulfonate (LS), urea formaldehyde (UF), water (W), and triple super phosphate (TSP).

|Means followed by the same letter are not significantly different at;?0.10 within each column.

–  –  –

Poultry litter (PL) and municipal biosolids (BS) are valuable fertilizer sources due to significant nutrient concentrations. However, if applied on a P basis, low N:P ratios coupled with low total N availability provide inadequate fertilization. Nitrogen fortification is needed to increase PL and BS utility as agronomic and horticultural fertilizers. The objective of this study was to model N release characteristics from Nfortified PL and BS granular fertilizers containing additives. A 2 x 2 x 3 8 factorial arrangement of granules with and without BS, with and without a nitrification inhibitor [dicyandiamide (DCD)] and bound with lignosulfonate, urea formaldehyde, or water was tested in a 112 d non-leached aerobic incubation study. The investigation was conducted on a silt loam soil in a randomized complete block design. Extraction procedures for inorganic N were conducted at 0, 3, 7, 14, 28, 56, 84, and 112 d. Granular product mineralization patterns were also compared to fresh PL, ground PL, BS, Milorganite, DCD, and urea treatments. Averaged over the entire incubation period, granulated products had 71.5% of N mineralized while urea, BS and PL averaged 80.5, 16.8, and 36.7%, respectively. Granules containing DCD had 6.7% less N mineralization and suppressed nitrification in granular treatments until 56 d after fertilizer application.





Binding agent and BS additions had no statistical impact on NH4-N or NO3-N soil concentrations. Nitrogen-fortified PL and BS granules may improve N efficiency over fresh PL and BS due to more N availability and less potential environmental N losses over a growing season.

–  –  –

BS, biosolids; DCD, dicyandiamide; epm, evolutions per minute; LS, lignosulfonate;

LSD, least significant difference; PL, poultry litter; PLU, PL + urea; PLUB, PLU + BS;

PLUBDCD, PLUB + DCD; PLUDCD, PLU + DCD; UF, urea formaldehyde; W, water.

–  –  –

Poultry litter is a proven fertilizer and possesses restorative qualities when applied to soils that are severely eroded or precision leveled (Shortall and Liebhardt, 1975; Bitzer and Sims, 1988; Sistani et al., 1988; Miller et al., 1990; Miller et al., 1991; Edwards and Daniel, 1992; Cooperband et al., 2002; Brye et al., 2005; Mitchell and Tu, 2005).

Biosolids, municipal sewage sludge treated to land application standards, were first used in published fertilizer research in 1924 and have been successfully used in production systems since (Reynolds, 1926; Hinesly et al., 1972; Gilmour et al., 2003). While the utility of using PL and BS in agronomic settings is well established, limitations exist with large scale use in its unaltered form. Both materials have low N:P ratios, requiring N fortification for agronomic acceptability when applied on a P basis (Edwards and Daniel, 1992). The unaltered material is also too bulky and irregular for practical and efficient land spreading, has an inconsistent analysis, odor, and a negative stigma (Mitchell and Tu, 2005). Formulating PL and BS into value added fertilizer sources will allow them to be more competitive in the market; thereby, increasing use and decreasing environmental concerns in nutrient surplus watersheds.

Poultry litter contains approximately 35 g total N kg"1, with most N in the organic form (-70%) and the remainder (30%) residing in inorganic fractions (Sims, 1986; Sims, 1987; Westerman et al., 1987). Pratt (1973) proposed that 90% of the PL organic fraction

–  –  –

approximately 69% organic N mineralization. Similar to PL, USEPA (1995) reported mean BS values of 39 g total N kg"1 with 18% of total N present as inorganic N. Gilmour and Skinner (1999) found that 40% of BS total N was available during the growing season during incubation and field trials with non-dried BS. However, processing PL and BS into fertilizers changes nutrient release characteristics over fresh ingredients. For instance, Hadas and coworkers (1983) showed more inorganic N release from pelletized litter compared to fresh PL while greenhouse studies by Cox (1995) indicated lower N mineralization rates from pelletized BS compared to fresh BS. Grinding PL for granulation purposes may also impact mineralization since fine particles have larger surface area for microbial activity compared to fresh PL (Hadas et al., 1983; Cabrera, 1994).

Additives to granulated PL and BS products may enhance N use efficiency by resisting N transformations to NO3-N or by physically releasing N at slower rates during the growing season. Several studies indicated that DCD, a nitrification inhibitor, can effectively reduce N loss in agronomic systems and increase plant N assimilation and yield (Cowie, 1918; Ashworth and Rodgers, 1981; Norman et. al., 1988; Norman et. al.

1989; Reeves and Touchton, 1989). Adding different fertilizer additives that double as a binding agent may also change granule N release characteristics. For instance, urea formaldehyde is commonly used in slow release fertilizers and was shown to release inorganic N over several weeks (Christianson et al., 1988; Mikkelsen et al., 1994). Urea formaldehyde is also used as a binder for forming ground organic material into stable pellets (Tabil et al., 1997). Lignosulfonate used as a binding agent will not offer slow

–  –  –

fertilizer application (Tabil et al., 1997). Reducing surface area of finely ground PL by formulating materials into granules may decrease overall PL and BS mineralization rates (Hadasetal., 1983).

Few research studies concerning fortification of PL and BS fertilizers with products that change N mineralization and transformation dynamics have been conducted. The objective of this study was to establish inorganic N release patterns from N-fortified PL and BS fertilizers containing different additives using a silt loam soil under non-leached aerobic conditions.

–  –  –

A non-leached aerobic incubation study was conducted with a Dewitt silt loam (Fine, smectitic, thermic Typic Albaqualf) to evaluate N mineralization characteristics of N-fortified PL and BS granular fertilizers. Selected soil and fertilizer chemical properties are presented in Table 6.1. Dicyandiamide was included in certain treatments at a 1:10 DCD-N:total N ratio. Total granular fertilizer C and N concentrations were estimated by dry combustion using a LECO CN2000 (LECO Corp., St. Joseph, MI 49085) (Colombo and Giazzi, 1982). Inorganic N was extracted by shaking 3 g of fertilizer with 30 mL 2 M KC1 at 200 evolutions per minute (epm) for 2 h (Hoskins et al., 2003).

Nitrogen fertilizers were applied at a rate of 330 mg N kg soil" to allow incorporation of several whole fertilizer granules. Fertilizers were mixed with 119 g "asis" soil (100 g on dry weight basis) in 1 L polyethylene wide mouth bottles. Double deionized water was added to each bottle to raise moisture content to 60% water filled

–  –  –

1984). Bottle weights were taken so water concentration could be corrected on a weekly basis. Uncapped bottles were placed in 100% humidity chambers and incubated at 25°C for 0, 3, 7, 14, 28, 56, 84, and 112 d. At each sampling interval, 1 incubation vessel per replication per treatment was sacrificed and approximately 10 g soil was subsampled from each bottle for moisture determination. Inorganic N from the remaining soil was extracted by adding 900 mL 2 MKC1 to the bottle and shaking for 1 h at 200 epm (Mulvaney, 1996). The suspension was allowed to settle for 30 min and supernatant was decanted and filtered through Whatman 42 filter paper (Whatman pic, Middlesex, UK).

Ammonium-N and NO3-N were determined using continuous flow analysis on a Sanp us System (SKALAR Inc., Norcross, GA 30071).

–  –  –

Carbon to N ratios for the bulk soil and fertilizers was calculated by dividing total C concentration by total N concentration. For the incubation study, unamended control soil inorganic N concentrations at each time interval (Fig. 6.1) were subtracted from the total amount extracted (soil + fertilizer inorganic N) to achieve fertilizer inorganic N mineralized. Fertilizer inorganic N mineralized was divided by total N applied to achieve a percentage of available total N.

–  –  –

Incubations were conducted in a randomized complete block design with treatments blocked per incubator. Each of 3 blocks served as a replication and was analyzed as a random effect. Nitrogen sources used were arranged i n a 2 x 2 x 3 x 8 factorial arrangement with the following treatments: with and without BS; with and

–  –  –

incubated for 0, 3, 7,14, 28, 56, 84, and 112 d. The 12 N-fortified PL and BS fertilizer combinations were also compared to BS, DCD, fresh PL, ground PL, Milorganite, and urea fertilizer N sources in a randomized complete block design. Data were analyzed using analysis of variance conducted with the General Linear Model procedure (PROC GLM) in SAS v. 9.1 (SAS, 2003) at the 5% significance level. Fisher's protected least significant difference (LSD) test was used to separate significant means (Steele and Torrie, 1980).

–  –  –

Available N mineralized from dry ingredients used to make our granular fertilizers and for fertilizers used as comparison are presented in Fig. 6.2. Urea had 98.5% of N represented as inorganic fractions 7 d after application. Urea quickly undergoes hydrolysis if sufficient urease enzymes are present in conjunction with desirable environmental conditions (Moyo et al, 1989; Han et al., 2004). Recovery of urea-N as inorganic N had decreased to 73 and 57% N availability for 84 and 112 d, respectively (Fig. 6.2). Norman and coworkers (1987) suggested N immobilization, denitrification and/or volatilization as the main inorganic N loss pathways during aerobic incubations on silt loam soils. Fresh PL had 38.6% of total N as inorganic fractions 7 d after application;



Pages:     | 1 |   ...   | 11 | 12 || 14 | 15 |   ...   | 17 |


Similar works:

«Freshwater prawn (Macrobrachium rosenbergii) farming in Greater Noakhali Districts Catherine Lecouffe January 2005 The Greater Noakhali Aquaculture Extension Project (GNAEP) is a project of the Government of Bangladesh (GoB) supported by Danish International Development Assistance (Danida), under the overall responsibility of the Ministry of Fisheries and Livestock (MoFL) and implemented by the Department of Fisheries (DoF). The project began in July 1998 and has been extended until June 2006....»

«ANDREW G. VAUGHN Gustavus Adolphus College 800 West College Ave. St. Peter, MN 56082 507–933–7475 (O); 507–934–1225 (H) email: avaughn@gustavus.edu http://www.gac.edu/~avaughn POSITIONS HELD Associate Professor of Religion: Gustavus Adolphus College, St. Peter, MN. Appointment with continuous tenure in area of Hebrew Bible. 2002 – present. Chair, Department of Religion: Gustavus Adolphus College, St. Peter, MN. 2003 – present (on sabbatical 2004–5 academic year). Supply Preacher:...»

«A GREAT KOREAN MUSIC PIONEER MIN-CHONG PARK: A PERFORMANCE GUIDE OF HIS SELECTED VIOLIN WORKS A Dissertation Submitted to the Graduate Faculty of the Louisiana State University and Agricultural and Mechanical College in partial fulfillment of the requirement for the degree of Doctor of Musical Arts in The School of Music by Sin Myung Min B.A., Kookmin University, 2006 M.M., Temple University, 2009 December 2014 ACKNOWLEDGEMENTS I would like to express my deep appreciation to the members of my...»

«Pak. J. Bot., 41(4): 1627-1635, 2009. DEVELOPMENT OF GENETIC LINKAGE MAP OF LEAF HAIRINESS IN GOSSYPIUM HIRSUTUM (COTTON) USING MOLECULAR MARKERS IFTIKHAR ALI1*, ABIDA KAUSAR1, MEHBOOB-UR-REHMAN3, YUSUF ZAFAR3, MUHAMMAD ASIF3, MUHAMMAD ASHRAF2, SANA RIAZ1, SARA ZAFAR1, ABDUL WAHID2, SOBIA MAQSOOD1, MUBASHIR NIAZ1 AND SYED QAISER ABBAS1 1 Department of Botany, GC University, Faisalabad, Pakistan 2 Department of Botany, University of Agriculture, Faisalabad, Pakistan 3 National Institute of...»

«2013 South Dakota Crop Protection Guide Corn Weed Control (text) Weeds: Mike Moechnig, Darrell L. Deneke, Leon J. Wrage, Jill Alms, Dave Vos, and Mark Rosenberg Insects: Adrianna Szczepaniec and Buyung Hadi Diseases: Kay Ruden “This document represents only a portion of the 2013 Corn Crop Protection Guide. The complete guide is available at iGrow.org. Information in this publicationis based on SDSU and other research and observations and provides a summary of label recommendations. It is not...»

«FREQUENTLY ASKED QUESTIONS (FAQs): MINNESOTA’S STAFF DEVELOPMENT STATUTES Minnesota Statutes, sections 122A.60 and 122A.61 Created September 2001 Updated July 2002, March 2006, February 2008, November 2010, August 2013 In response to many interpretation and implementation questions about Minnesota’s staff development statutes, the organizations listed below have jointly developed this set of Frequently Asked Questions (FAQs). The statutes discussed in this set of FAQs can be found at Minn....»

«SAFER TO STEAL THAN SCORE: PRESS COVERAGE OF FINANCIAL AND SEXUAL SCANDALS, AND ELECTORAL OUTCOMES A Dissertation Submitted to the Graduate Faculty of the Louisiana State University and Agricultural and Mechanical College in partial fulfillment of the requirements for the degree of Doctor of Philosophy in The Manship School of Mass Communication by Chance York B.G.S., University of Kansas, 2008 M.S., Kansas State University, 2010 May 2014 ©Copyright 2014 Chance York All rights reserved ii...»

«As. J. Food Ag-Ind. 2012, 5(02), 96-103 Asian Journal of Food and Agro-Industry ISSN 1906-3040 Available online at www.ajofai.info Research Article Effect of vacuum cooling on physico-chemical properties of organic coriander Apichart Sirinanuwat1, Danai Boonyakiat 2,3 and Pichaya Boonprasom 1,3* 1 Division of Food Engineering, Faculty of Agro-Industry, Chiang Mai University, Thailand, 50200 2 Department of Horticulture, Faculty of Agriculture, Chiang Mai University, Thailand, 50200 3...»

«Rural Sociology 78(1), 2013, pp. 1–28 DOI: 10.1111/j.1549-0831.2012.00095.x Copyright © 2012, by the Rural Sociological Society A More Perfect Commodity: Bottled Water, Global Accumulation, and Local Contestation Daniel Jaffee Department of Sociology *Washington State University Soren Newman School of the Environment Washington State University Abstract Bottled water sits at the intersection of debates regarding the social and environmental effects of the commodification of nature and the...»

«Research in ISSN : P-2409-0603, E-2409-9325 AGRICULTURE, LIVESTOCK and FISHERIES An Open Access Peer Reviewed Journal      Open Access Res. Agric. Livest. Fish. Research Article Vol. 2, No. 1, April 2015: 125-133 FISHERS ACCESS TO THE COMMON PROPERTY WATERBODIES IN THE NORTHERN REGION OF BANGLADESH Md. Amzad Hossain1*, Mousumi Das1, Md. Shahanoor Alam2 and Md. Enamul Haque3 1 Department of Aquaculture, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706,...»

«Assessing the Alliance for Green Revolution in Africa August 2009 Report Contributions: Sam Moyo, Walter Chambati, Tendai Murisa and Amade Sucá TABLE OF CONTENTS 1. INTRODUCTION 2. THE CONTEXT: DECLINING AGRICULTURAL PRODUCTIVITY 3. OVERVIEW OF THE AGRA PROJECT 3.1 Background 3.2 Principles and policies: defining the problem and interventions 3.3 Programmes and their implementation 3.4 The actors and partnerships involved 3.4.1 AGRA Leadership 3.4.2 Implementation partnerships 3.4.3 AGRA and...»

«Tsakiri, Ioannidis, Carty 1 LASER SCANNING ISSUES FOR THE GEOMETRICAL RECORDING OF A COMPLEX STATUE Maria TSAKIRI1, Charalambos IOANNIDIS1, Alistair CARTY2 1 School of Rural and Surveying Engineering, National Technical University of Athens, Greece. 2 Archaeoptics Ltd, Glasgow, UK KEY WORDS: laser scanning, heritage applications, three-dimensional, close range, data capture ABSTRACT Recent advances in laser scanning technology allow for fast and efficient 3D documentation of cultural heritage...»





 
<<  HOME   |    CONTACTS
2016 www.dissertation.xlibx.info - Dissertations, online materials

Materials of this site are available for review, all rights belong to their respective owners.
If you do not agree with the fact that your material is placed on this site, please, email us, we will within 1-2 business days delete him.