Thesis (Ph. D.)--Washington State University, May 2010. / Title from PDF title page (viewed on June 3, 2010). "Department of Biological Systems Engineering." Includes bibliographical references.

Thesis (M.S.)--University of Wisconsin--Madison, 1967. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (Ph. D.)--Washington State University, December 2009. / Title from PDF title page (viewed on Feb. 19, 2010). "Department of Biological Systems Engineering." Includes bibliographical references.

Considerable amounts of N can be lost from manure through NH$ sb3$ volatilization. Four laboratory studies were conducted to evaluate the effects of organic amendments on reducing NH$ sb3$ loss from liquid hog manure (LHM). The organic amendments used in these studies were sugar, sawdust and paper products including filter paper (FP), paper bag (PB), newsprint (NP) and pulp sludge (PS). Generally, organic amendments had significant effects on reducing NH$ sb3$ loss from LHM and their effectiveness increased with increasing addition rates. Sugar addition of 3% or higher could eliminate the NH$ sb3$ loss, depending on LHM properties and incubation conditions. The effectiveness of sugar, especially lower rates, decrease with time. The unrecovered NH$ sb4$ loss increased and manure pH decreased with the increase in sugar rates, indicating that the reduction in NH$ sb3$ loss due to sugar addition may have been caused by N immobilization and pH reduction. Sawdust addition reduced the NH$ sb3$ loss by as much as 20% compared to the control. The mixture of 5.5% sugar and 5% sawdust was more effective in reducing NH$ sb3$ loss than 5.5% sugar alone but, lower sugar rates were not similarly affected by sawdust addition. Addition of 5% FP, PB, NP and PS resulted in the decrease in NH$ sb3$ loss by as much as 40, 47, 37 and 29% in comparison to the non-amended manure. The unrecovered NH$ sb4 sp+$ loss and the loss of added C increased with increasing C addition, indicating that N immobilization may be the cause of the decrease in NH$ sb3$ due to paper product additions. (Abstract shortened by UMI.)

Ammonia (NH$ sb3$) volatilization from manure can represent a major process through which nitrogen (N) is lost from the soil-plant-animal system. Reductions in NH$ sb3$ volatilization have significance both in economic and ecological aspects. Calcium lignosulphonate (CaLS), an acidic, water-soluble organic waste product of the pulp and paper industry, is expected to reduce NH$ sb3$ volatilization from liquid hog (Sus scrofa dometicus) manure (LHM) and consequently increase fertilizer value of LHM. Reduction of NH$ sb3$ loss from LHM was studied using added CaLS at 0, 6% 12% and 18% CaLS (based on fresh LHM weight) during 21 d incubation. Cumulative losses of NH$ sb3$-N ranged between 0 to 46% of initial total N. Compared to untreated LHM, the 6% CaLS treatment control N loss for 7 d and promoted N loss thereafter, while 12% and 18% CaLS treatments effectively reduced N losses throughout the 21 d incubation period. The N availability and the effect of CaLS-LHM mixtures on ryegrass (Lolium multiform Lamb.) growth were assessed on two soils mapped as St. Amable (sandy loam) and Ste. Rosalie (clay loam) from eastern Canada. Calcium lignosulphonate showed adverse effect on ryegrass plant growth, while as an amendment it did not reduce the effectiveness of LHM-N for ryegrass dry matter yield (DMY) and chemical composition at application rate up to 12% of LHM for the sandy loam soil and 18% of LHM for the clay loam soil. These findings suggested that CaLS may be used as an amendment for controlling N losses from animal manures.

Thesis (M.S.)--University of Tennessee, Knoxville, 2000. / Vita. Includes bibliographical references. Also available via the Internet.

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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