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The availability of potassium to plants as affected by stable manureBartholomew, R. P. January 1926 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1926. / Typescript. With this is bound: The availability of potassium to plants as affected by stable manure / R.P. Bartholomew, reprinted from the Journal of the American Society of Agronomy, vol. 20, no. 1 (Jan. 1928), p. 55-81. Includes bibliographical references (leaves 89-91).
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Bacteria in anaerobically stored bovine waste populations and group identifications.Chen, Tsu-Chung, January 1970 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliography.
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Chemical speciation and redox effects on phosphorus release from biosolids and manure amended soilsShober, Amy L. January 2006 (has links)
Thesis (Ph.D.)--University of Delaware, 2006. / Principal faculty advisor: J. Thomas Sims, Agriculture and Natural Resources. Includes bibliographical references.
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Fate of manure phosphorus in a weathered sandy clay loam soil amended with three animal manuresVan Averbeke, W, Azeez, JO 11 December 2009 (has links)
Laboratory incubation was conducted for 120 days to study the fate of phosphorus in poultry (PM), cattle
(CM) and goat manures (GM). Phosphorus mineralized from manure was dependent on total P, Al and Fe
content. Manures improved P availability in the order: PM > CM > GM; however, the highest amount of P
was fixed or immobilized between 10 and 70 days of incubating with CM and GM. Fixation and immobilization
of mineralized P from poultry manure was negligible probably due to the high total P and the low
amount of Al and Fe. Generally, manure application reduced the ability of the soil to fix P. More than 90%
of the manure P was either immobilized or fixed by the soil. The relationship between the amount of P
released and time was cubic. Improvement of the C:P ratio of CM and GM would be an option to enhance
their agronomic use as fertilizer P source.
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The availability of phosphorus from various biological residues as a source of phosphorus for succeeding cropsMiller, Raymond W., 1928- January 1953 (has links)
No description available.
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The effect of different sources and rates of nitrogen fertilizers on lettuceMahler, Richard Joseph, 1937- January 1964 (has links)
No description available.
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The effect of manure on the response of corn to nitrogen and phosphorusUdo, Eno Jumbo, 1937- January 1966 (has links)
No description available.
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The attributes of green manuring as soil amendments for succeeding cropsCzajkowski, Henry Julian, 1924- January 1951 (has links)
No description available.
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Effect of organic amendments on soil atmosphereHossain, Mohamed Sarwar. January 2001 (has links)
Gaseous movement in soil varies with soil's physicochemical properties and biochemical oxygen demand. Diffusivity patterns of four different types of soil (sand, silt, sandy silt, and clay) were examined and sand have shown the highest rate of diffusivity increase with the decreasing soil moisture content. Raw cow manure was then added to the sandy soil at four different rates 0, 20,40, and 80 Mg/ha. Depletion of soil oxygen and changes of carbon dioxide and ammonia for different concentrations were compared against the control. The oxygen depletion or carbon dioxide and ammonia accumulation reached the highest level at initial 16 hour followed by gradual reversal to a steady state. A significant amount of oxygen depletion was noticed with the different concentration levels. Oxygen depletion had shown an oscillatory behavior towards zero. Among different concentrations that of 40 Mg/ha showed the highest oscillatory behavior, but the shortest time was required to recover its original oxygen level. Thus the 40 Mg/ha application of organic matter is seems to be the optimum level for sandy soil.
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Anaerobic digestion strategies for dairy manuresFrear, Craig. January 2009 (has links) (PDF)
Thesis (Ph. D.)--Washington State University, August 2009. / Title from PDF title page (viewed on July 31, 2009). "Department of Biological Systems Engineering." Includes bibliographical references.
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