Ammonia (NH₃) volatilization has become a prominent concern during manure land application not only for producers, but federal and state agencies as well.  NH₃ losses contribute to acid rain, deficiencies in crop nutrients, and inhibited nitrogen resources.  A system for measuring NH₃ volatilization from land applied manure can help to recognize the impact NH₃ has on atmospheric conditions.  Solid dairy manure was collected, analyzed, and mixed with a silt loam soil and a loamy sand soil in the laboratory.  The goal was to determine the effect of varied application rates and different percent total solids (TS) on the rate of NH₃ loss from the soil-manure mixtures.  Sixteen trials that each ran for approximately 24 hr were conducted in a controlled environment using a laboratory micro-tunnel air sampling protocol.  The results show an increasing trend of NH₃ emissions in the first 4 to 6 hr until a peak was reached.  Emission rates steadily decreased for several more hours until reaching steady-state conditions where emissions varied slightly.  Applications rates of 300 lb N/ac (336 kg/ha) produced higher emissions in the loamy sand than did application rates of 150 lb N/ac (118 kg/ha) in the same soil.  In addition, the soil-manure mixtures with 8% TS yielded greater emission rates than the mixtures containing only 4% TS regardless of soil type or application rate.  Hydrogen sulfide emissions in each of the trials showed little variability.