The forest sample had been tampered with and time constraints prevented us from repeating the comparison. Some interesting results were obtained in the open field. During the 24-hour period 226.5 mL of precipitation fell. Discussion We can only speculate about the results of the chemical tests. We may infer the pH values are due to alkaline ammonium compounds that result from decay of plant matter.
Tree canopy does affect rainfall amounts that can be collected at ground level.
Seventy-two mL more of rain was collected in the open area. The pH of the collected samples varied greatly. The pH in the primary forest area was more basic than in the open area. Since compounds of ammonia are alkaline and concentrations of these compounds was higher in the primary forest, there may be a relationship. It appears that even during intense periods of rainfall, the intermittent dry spells maintain conditions to promote some evaporation.