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Tesis sobre el tema "Soil conservation"

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1

Stenberg, Maria. "Soil tillage influences on nitrogen conservation /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1998. http://epsilon.slu.se/avh/1998/91-576-5468-9.gif.

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2

Hoshino, Mitsuo, and 光雄 星野. "Soil erosion and conservation in Western Kenya." Graduate School of Environmental Studies, Nagoya University, 2006. http://hdl.handle.net/2237/7323.

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3

Hwang, Sang Won. "Sustainable use of soil resource base in the Dominican Republic : a farm level economic analysis of soil conservation practices /." This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-01122010-020205/.

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4

Piccoli, Ilaria. "CHALLENGES OF CONSERVATION AGRICULTURE ON SILTY SOILS. DISENTANGLING THE EFFECTS OF CONSERVATION PRACTICES ON SOIL ORGANIC CARBON CYCLE AND SOIL PORE NETWORK IN NORTH-EASTERN ITALY." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3424845.

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Soil organic matter loss is a widely recognized European soil threat and intensive and repeated tillage operations are known to negatively affect numerous soil properties and ecosystem services. In this view, the study on more sustainable agronomic managements is a pressing need for research community. Between sustainable techniques, conservation agriculture (CA) is nowadays a spread technique based on three main pivotal points: 1) minimum soil disturbance, 2) permanent soil covering and 3) crop diversification. CA is often associated with numerous soil functions such as increasing of soil bio
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5

Dinel, H. (Henri) 1950. "The influence of soil organic matter components on the aggregation and structural stability of a lacustrine silty clay /." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74306.

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Under intensive farming, soil structure degradation and soil erosion are primarily associated with losses of organic matter. Restoration of soil structure may depend on the amount and nature of the organic amendment added. The effect of the addition of humic and fibric materials, and beeswax, a naturally occurring source of long-chain aliphatics comparable to those present in humic materials, on microbial activity and the structural properties of a waterlogged silty clay low in organic carbon was investigated. The incorporation of the fibric material increased the microbial activity in proport
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6

Alemu, Tekie. "Land tenure and soil conservation : evidence from Ethiopia /." Göteborg, 1999. http://www.loc.gov/catdir/toc/fy041/00309493.html.

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7

Montas, Hubert J. "A decision support system for soil conservation planning /." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59831.

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A Decision Support System for the design and planning of soil conservation systems on a watershed scale was conceived and applied to southwestern Quebec. The system integrated Geographical Information System, distributed parameter hydrologic modeling and Expert System technologies. Maps of appropriate soil conservation practices were produced for two small rural basins representative of the study region. The effect of the selected practices on runoff and sediment was assessed using the ANSWERS model. Erosion sites were targeted using a once-in-25 year design storm. It was observed that small p
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8

Goshu, Kassaye. "Biological soil conservation techniques for Maybar area, Ethiopia /." [S.l : s.n.], 1994. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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9

Barrak, Khalid Mohamed 1956. "Effects of various mulches on soil moisture conservation." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/191944.

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The purpose of this work was to study and evaluate the effect of various mulches on the soil moisture content for sandy loam soil under high temperatures. The straw, wood shavings, and rock fragments were used with different rates of application for covering soil. Treatments were compared to bare soil. The moisture content was significantly higher for mulched treatments. However, the effectiveness of wood shavings and rock fragments mulches did not seem different in soil moisture content, while straw mulch did. The soil moisture content for the straw had the highest value at the end of the exp
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10

Kelsey, Kurt L. "Use of the Revised Universal Soil Loss Equation (Rusle) to predict event soil loss /." Link to abstract, 2002. http://epapers.uwsp.edu/abstracts/2002/Kelsey.pdf.

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11

Wigley, Georgina M. "Constraints on soil conservation in the Pindars River and Two Meetings Watersheds, Jamaica." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=64098.

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12

Newman, James Kenneth. "Soil erosion prediction for shaping conservation policy and practice." [Ames, Iowa : Iowa State University], 2010. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3403858.

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13

Nyangena, Wilfred. "Essays on soil conservation, social capital and technology adoption /." Göteborg : Deptartment of Economics, School of Economics and Commercial Law [Nationalekonomiska institutionen, Handelshögskolan], Göteborg University, 2006. http://www.handels.gu.se/epc/archive/00004619/01/Nyangena%5Ffull.pdf.

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14

Pradhan, Lal Chand. "DESIGN, CONSTRUCTION AND EVALUATION OF SMALL SCALE STRUCTURES FOR CONTROLLING CONCENTRATED FLOW EROSION." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275415.

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15

Kagwanja, Joan Cuka. "Determinants of farm level soil conservation technology adoption : lessons from the high rainfall, high populated, steep sloped Mt. Kenya highlands, Embu, Kenya /." free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3025628.

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16

Cooper, Sophie E. "The role of conservation soil management on soil and water protection at different spatial scales." Thesis, Cranfield University, 2006. http://hdl.handle.net/1826/1775.

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Agriculture has a direct impact on the soil environment, altering soil properties, surface characteristics and erosion risk. This has led to a move away from conventional tillage to the adoption of conservation practices, aiming to minimise soil disturbance and reduce erosion. The effectiveness of this has been shown in studies from the USA, but equivalent research in Europe is limited. The present study investigated losses of soil, water, nutrients and carbon from different tillage regimes. Two UK sites were used – Loddington (Leicestershire, on heavy clay) and Tivington (Somerset on sandy cl
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17

Bhattacharyya, Ranjan. "Using palm-mat geotextiles for soil conservation on arable loamy sands in the United Kingdom." Thesis, University of Wolverhampton, 2009. http://hdl.handle.net/2436/88536.

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To date, most studies on the effectiveness of geotextiles on soil erosion rates were conducted in laboratory experiments for <1 h. Hence, at Hilton, East Shropshire, UK, this study investigated the effectiveness of palm-mat geotextiles (Borassus and Buriti mats) in reducing rainsplash erosion, runoff and soil loss and changing selected soil properties under field conditions over two years (January 2007-January 2009). Mat-cover effects on rainsplash erosion were studied in two sets on a loamy sand soil (0o slope). In both sets, six randomly-selected plots (each 1 m2) were completely matcover
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18

Mei, Xiaodong. "Soil conservation and sustainable land use in Inner Mongolia, China." Weikersheim Margraf, 2005. http://deposit.ddb.de/cgi-bin/dokserv?id=2795672&prov=M&dok_var=1&dok_ext=htm.

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19

Hellin, Jonathan. "Soil and water conservation in Honduras : a land husbandry approach." Thesis, Oxford Brookes University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325265.

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20

Cárcamo, Julio Antonio. "Sustainable development in Honduras: economic evaluation of soil conservation practices." Thesis, Virginia Tech, 1992. http://hdl.handle.net/10919/42613.

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Costs and benefits associated with erosion reduction and adoption of soil conservation practices for a representative farm in a watershed in Honduras are examined in a linear programming framework. Special attention is paid to income-soil loss tradeoffs, income-risk tradeoffs, and on the effect of different farmers' planning horizons on net farm income. A representative farm model for the area was constructed to achieve the objectives of the study. Twelve farmers in the region were surveyed, crop budgets were prepared, and soil loss values were calculated to provide the information required
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21

Milne, Eleanor. "Soil conservation in relation to maize productivity on sub-tropical red soils in Yunnan Province, China." Thesis, University of Wolverhampton, 2001. http://hdl.handle.net/2436/93882.

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Agricultural land in China is being degraded, with soil erosion becoming an increasing problem. In Yunnan Province, south-west China, there is a long history of soil erosion due to soil type, climate, anthropogenic influence and because 95% of the Province is mountainous. Population pressure and lack of flat land necessitate cultivation of steep slopes. The Yunnan Government prohibits cultivation of slopes >25°, however policy enforcement would result in food shortages in the Province, due to a lack of suitable land <25°. Therefore, the most appropriate way to curb soil erosion in Yunnan is to
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22

Tizale, Chilot Yirga. "The dynamics of soil degradation and incentives for optimal management in the Central Highlands of Ethiopia." Thesis, Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-06082007-094341.

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23

Moehansyah, Haji. "Soil erosion, population pressure and conservation strategies in the Riam Kanan catchment, Indonesia /." [Richmond, N.S.W.] : Faculty of Environmental Management and Agriculture, University of Western Sydney, Hawkesbury, 1998. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030623.113640/index.html.

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24

Norris, Patricia E. "Factors influencing the adoption of soil conservation practices in Virginia's Piedmont Bright Leaf Erosion Control Area." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/104521.

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25

Yau, Fung-yee Caroline. "Soil and afforestation in the Shing Mun Country Park, Hong Kong." Click to view the E-thesis via HKUTO, 1997. http://sunzi.lib.hku.hk/hkuto/record/B42128420.

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26

Negim, Osama. "New Technique for Soil Reclamation and Conservation: In Situ Stabilization of Trace Elements in Contaminated Soils." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2009. http://tel.archives-ouvertes.fr/tel-00408020.

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L'accumulation de métaux toxiques dans le sol est principalement héritée de matériaux parents ou d'éléments résultant de l'activité humaine. Par conséquent, de nouvelles techniques sont en cours d'élaboration pour remédier à ces contaminations dans les sols pollués, telles que la phytoremédiation et la stabilisation in situ. La stabilisation in situ est une technique commune de réduction des effets négatifs des métaux et métalloïdes, tels que As, Cr, Cu, Cd et Zn dans les sols contaminés par l'ajout d'amendements. L'application de matières alcalines telles que les laitiers d'aciéries et un lai
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27

Negim, Osama. "New technique for soil reclamation and conservation : in situ stabilisation of trace elements in contaminated soils." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13821/document.

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Les sols sous contraintes que ce soit du point de vue charges polluantes comme avec les Métaux Traces (MT) ou bien du point de vue stress hydrique (perte des capacités de rétention menant à la désertification des sols) concernent de nombreux espaces du territoire national, de même que la région du pourtour Méditerranéen. Le nombre de sites pollués par des substances inorganiques affectant de larges espaces est en constante augmentation. Les stratégies pour leur rémédiation sont variées mais très peu envisagent la dépollution tout en restaurant les propriétés pédologiques des sols concernés. La
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28

Negim, Osama Le Coustumer Philippe Mench Michel. "New technique for soil reclamation and conservation in situ stabilisation of trace elements in contaminated soils /." S. l. : S. n, 2009. http://ori-oai.u-bordeaux1.fr/pdf/2009/NEGIM_OSAMA_2009.pdf.

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29

Shouse, Bennett Scott. "Implementation costs of Kentucky's erosion control best management practices for skid trails." Lexington, Ky. : [University of Kentucky Libraries], 2002. http://lib.uky.edu/ETD/ukyfore2001t00015/Shouse.pdf.

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Thesis (M.S.)--University of Kentucky, 2001.<br>Title from document title page. Document formatted into pages; contains vi, 75p : ill., maps. Includes abstract. Includes bibliographical references (p. 74).
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30

Moehansyah, Haji. "Soil erosion, population pressure and conservation strategies in the Riam Kanan Catchment, Indonesia." Thesis, [Richmond, N.S.W.] : Faculty of Environmental Management and Agriculture, University of Western Sydney, Hawkesbury, 1998. http://handle.uws.edu.au:8081/1959.7/394.

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This thesis studies the Riam Kanan Catchment (RKC), located in Indonesia, in order to: evaluate the effect of land use on runoff, erosion and soil properties; examine rainfall-runoff-erosion relationships under different land use types; evaluate the suitability of runoff and soil erosion models; develop an understanding of the interaction between physical, demographic, socio-economic and political aspects in relation to soil erosion; evaluate population pressure and its impacts; develop a suitable methodology for identifying potential erosion hazard areas; and develop suitable soil conservatio
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31

Castonguay, Stéphane. "Managing scientific change in agricultural policies : soil productivity, resource conservation and the legitimation of agrobiology /." This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-09052009-040708/.

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32

Norville, Peter. "The design and evaluation of soil conservation systems in St. Lucia /." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59576.

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Three soil conservation systems: contour drainage, strip cropping, and terracing, were designed and established within separate plots on hillside farmlands in St. Lucia. A control plot with no form of soil conservation was also established. Topographic and soils surveys of these plots were conducted. Rainfall, runoff and soil loss were measured over one wet season. Crop yields and construction and maintenance costs were also determined.<br>For rainfall amounts between 14.2 and 211.2 mm, runoff depths varied from 0.6 to 203.6 mm in the control plot, 2.1 to 199.2 mm in the contour drained plot,
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33

Ahiale, Evelyn Dalali. "Economic valuation of soil and water conservation technologies in northern Ghana." Thesis, University of Reading, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578024.

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Land degradation resulting largely from the environmentally unsustainable agricultural practices of smallholder farmers is a serious problem in Ghana. It is most serious in northern Ghana, where in spite of past efforts to solve it, persists because farmers' adoption of soil and water conservation technologies has not been encouraging. Farmers' inability to adopt soil and water conservation measures is mainly as a result of constraints resulting from market failures which lead to externalities like degradation. In the presence of externalities, government intervention is justified, and payment
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34

Arevalo-Mendez, Ignacio. "Soil conservation with leguminous cover crops following deforestation of tropical steepland." Thesis, Loughborough University, 1998. https://dspace.lboro.ac.uk/2134/33228.

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The steeplands of Central America are being systematically deforested as population pressure dictates a need for an increase in subsistence agriculture. The combined effect of high rainfall and lack of conservation measures leads to high levels of soil erosion. In order to assess sustainable soil conservation technology, research was conducted in the mountainous agricultural area of Guinope, Honduras. Runoff and soil loss from a number of plots that were established on various ground slopes and under different land uses were measured during the 1994 and 1995 seasons. Natural and fired woodland
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35

Schuler, Johannes. "An economic analysis of the implementation options of soil conservation policies." [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:100-opus-3186.

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36

Elliott, Jennifer A. "Soil erosion and conservation in Zimbabwe : political economy and the environment." Thesis, Loughborough University, 1989. https://dspace.lboro.ac.uk/2134/6945.

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This thesis concerns soil erosion and conservation in Zimbabwe. It is framed in the light of the contemporary heightened concern for the environment generally in Africa and the recent publication of the National Conservation Strategy for Zimbabwe (1987). Soil erosion is an archetypal interdisciplinary problem. This thesis complements and extends understanding of soil erosion and conservation in Zimbabwe via a methodological approach and a scale of analysis which have been under-represented in the literature to date. The research adopts a pluralist, regional political ecology approach (after Bl
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37

Troyee, Anupoma Niloya. "Impact of soil treatments in the conservation of native rhizobia populations." Master's thesis, Universidade de Évora, 2017. http://hdl.handle.net/10174/22076.

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Sustainable agriculture aims to achieve highcrop production, reducing the use of chemical fertilizers and herbicides. Rhizobia-legume symbioses are importantN2-fixing systems that can improvethe productivity ofsoils.The aim of this work was toevaluate the diversity of rhizobia on nodules of chickpeaplants grown in soil treated with a glyphosate, nitrate and Mesorhizobiuminoculation. The impact of glyphosate and nitrate on mesorhizobia growth and on the early stages of infection was also evaluated. The phylogenetic analysis of the 16S rRNA gene sequences showed a low diversity of rhizobia nodul
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38

Smith, Jennifer Lynn. "The use of rolled erosion control products (RECPs) for minimizing soil erosion." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available, full text:, 2007. http://wwwlib.umi.com/cr/syr/main.

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39

Moehansyah, Haji, of Western Sydney Hawkesbury University, and Faculty of Environmental Management and Agriculture. "Soil erosion, population pressure and conservation strategies in the Riam Kanan Catchment, Indonesia." THESIS_FEMA_XXX_Moehansyah_H.xml, 1998. http://handle.uws.edu.au:8081/1959.7/394.

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This thesis studies the Riam Kanan Catchment (RKC), located in Indonesia, in order to: evaluate the effect of land use on runoff, erosion and soil properties; examine rainfall-runoff-erosion relationships under different land use types; evaluate the suitability of runoff and soil erosion models; develop an understanding of the interaction between physical, demographic, socio-economic and political aspects in relation to soil erosion; evaluate population pressure and its impacts; develop a suitable methodology for identifying potential erosion hazard areas; and develop suitable soil conservatio
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40

Rachman, Achmad. "Influence of grass hedges on soil hydraulic properties, runoff and soil erosion in a small watershed /." free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p3115583.

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41

Moopayak, Sumitra. "Local polysaccharide-producing soil cyanobacteria as potential soil conditioners in Nakhonsawan Province, Thailand." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2008. https://ro.ecu.edu.au/theses/235.

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This study describes the successful cultivation of an indigenous (from Nakhonsawan) extrapolysaccharide-producing algal strain, and demonstrates its soil-conditioning potential in a greenhouse environment. The results show that local algal resources have potential as soil conditioners. The process involved surveying soil algae to identify potential candidates, selection of the most suitable candidate followed by optimisation for biomass production. mass cultivation and soil inoculation.
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42

Dijk, Paulus Maria van. "Soil erosion and associated sediment supply to rivers seasonal dynamics, soil conservation measures and impacts of climate change /." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2001. http://dare.uva.nl/document/60698.

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43

Mulengera, Matthew Kagorobha. "Soil loss prediction in the semi-arid tropical savanna zone : a tool for soil conservation planning in Tanzania." Thesis, University of Newcastle Upon Tyne, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318175.

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44

Hwang, Sang Won. "Sustainable use of soil resource base in the Dominican Republic:a farm level economic analysis of soil conservation practices." Thesis, Virginia Tech, 1992. http://hdl.handle.net/10919/40618.

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Income effects associated with specific levels of erosion reduction for a representative farm in the Bao watershed area in the Dominican Republic are examined in a linear programming framework. Estimation of costs expected in response to specific levels of erosion reduction and the income effects of changes in agricultural policies on the farmer's ability to conserve soil are examined. <p>Results indicate that income losses will be substantial when complying with soil loss standards without introducing soil conservation practices. Net income reduction of 36% can be expected with a reduction in
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45

Yau, Fung-yee Caroline, and 邱鳳儀. "Soil and afforestation in the Shing Mun Country Park, Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B42128420.

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46

Zaikin, Andrey. "Economics of soil and water conservation in irrigated and dry lands agriculture." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Thesis/Summer2006/a%5Fzaikin%5F072606.pdf.

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47

Tabot, Helen, Muluken Elias Adamseged, and Mohammed Nasir Uddin. "Analysis of Soil Conservation Policies : A Case Study of Germany and Bangladesh." 名古屋大学大学院教育発達科学研究科 技術・職業教育学研究室, 2012. http://hdl.handle.net/2237/17033.

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48

Dzuda, Lorraine Nyaradzo. "Analysis of soil and water conservation techniques in Zimbabwe, a duration analysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ60424.pdf.

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49

Krois, Joachim [Verfasser]. "Soil and Water Conservation in the Northern Andes of Peru / Joachim Krois." Berlin : Freie Universität Berlin, 2016. http://d-nb.info/1115722476/34.

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50

Kawa, Ibrahim Hussein. "The Dodoma Region Soil Conservation Project (HADO), Tanzania : is it institutionally sustainable?" Thesis, University of East Anglia, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357243.

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