Erosion of Soil and Poultry Manure— A Laboratory Study

ABSTRACT THE transport of soil and manure by simulated rainfall on 1 m X 0.64 m laboratory test plots was investigated to determine the effects of rainfall intensity, soil type, manure type, loading rate and drying time. A factorial experimental design was used with each factor at two levels. As expected, rainfall intensity and soil type were significant factors for solids transport, and manure loading rate was a significant factor for nutrient transport. Manure type and drying time were also significant factors for transport of certain nutrients. Overall, several factors and their interactions had significant effects on erosion and transport of soil, manure and nutrients. This indicates that prediction models of erosion and nutrient transport from areas receiving manure should consider several factors, including manure type, manure loading rate, and time between application and rainfall