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Soil ManagementAmburgey, Lyman R. 03 1900 (has links)
This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.
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Soil CrustsKemper, Doral W., Miller, David E., Gifford, Richard O., Uehara, Goro, Jones, Rollin C., Evans, Daniel D., Hough, Hugh W., Richman, Ronald W., Cary, John W. January 1974 (has links)
No description available.
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Soil structural quality and soil organic matter : can the level of soil organic matter be taken as an indicator in assessing soil structural quality?Yapa, P. I. January 2003 (has links)
No description available.
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Tilling compacted forest soils following ground-based logging in Oregon /Andrus, Charles Wesley. January 1982 (has links)
Thesis (M.S.)--Oregon State University, 1982. / Typescript (photocopy). Includes bibliographical references (leaves 142-148). Also available online.
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Soil ManagementAmburgey, Lyman R. 07 1900 (has links)
This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.
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Influence des instruments de culture sur la restructuration d'un sol compacte et le comportement d'une culture de sarrasin.Perraton, Etienne. January 1981 (has links)
No description available.
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Modeling effects of contrasting tillage and management on hydrological processes in selected soils of the Pacific Northwest USSingh, Prabhakar, January 2008 (has links) (PDF)
Thesis (Ph. D.)--Washington State University, December 2008. / Title from PDF title page (viewed on Feb. 6, 2009). "College of Engineering and Architecture." Includes bibliographical references (p. 77-85).
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Management and landscape variability effects on selected coastal plain soil physical propertiesBiscaro, André Scatena, Arriaga, Francisco J., January 2008 (has links) (PDF)
Thesis (M.S.)--Auburn University, 2008. / Abstract. Vita. Includes bibliographical references.
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Land use effects on soil quality and productivity in the Lake Victoria Basin of UgandaMulumba, Lukman Nagaya, January 2004 (has links)
Thesis (Ph. D.)--Ohio State University, 2004. / Title from first page of PDF file. Document formatted into pages; contains xv, 166 p.; also includes graphics (some col.). Includes bibliographical references (p. 134-153).
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Tillage effects on the aggregate-associated organic carbon and bulk density in some South African soils with different textureNjeru, Sarah Kangai January 2015 (has links)
Tillage operations disrupt the soil structure resulting in aggregates of various sizes and altered bulk density. Moreover, tillage influences soil carbon pools and many other soil physical properties. The objectives of this study were to determine, in various South African soils under different tillage systems, the following. (1) Amount of aggregate-associated soil organic carbon (SOC), (2) soil compressibility, and (3) relationship between compressibility, texture and the aggregate-associated SOC. The soil samples used in this study were collected from six different sites in Eastern Cape Province, South Africa. Soil samples were taken from conventional tillage (CT) and no-till (NT) land. To keep the soil aggregates intact sampling was done using a spade and carefully carried to the laboratory in rigid containers. For SOC determination, treatments were the two tillage systems, CT and NT, and four aggregate sizes. The experimental design was completely randomized design with a factorial layout and was replicated three times. Aggregate-associated SOC was determined using Walkley-Black method. Proctor compaction test was used determine the dry bulk density with varying moisture content and consequently the maximum bulk density (MBD) and critical water content (CWC). The aggregate-associated SOC content differed with tillage system and was significant higher (p < 0.05) in CT than NT. The amount of aggregate-associated SOC was 1.67 times higher in CT than NT plots. The MBD ranged between 1.77 g/cm3 and 10.27 g/cm3 and the CWC ranged from 9.1 percent to 10.3 percent. The higher amounts of SOC in CT were attributed to the annual crop residue returns while the lower amounts of SOC in the NT fields were due to grazing. Therefore, tillage influenced the amount of aggregate-associated organic carbon irrespective of the resulting size of the aggregate. The positive relationship between tillage and aggregate-associated SOC challenges the conversion of land to no-till for carbon sequestration. The overall gradient for correlation between the MBD and CWC was negative with r2 = 0.23 and a p value of 0.0076. The compressibility curves indicated higher values under CT if the texture class was silt clay.
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