TY  - SER
AU  - Wagner,Gail E.
TI  - Reports. Testing flotation recovery rates
T2  - American Antiquity. Journal of the Society for American Archaeology ; 
PY  - 1982///
CY  - Estados Unidos-US : 
PB  - Society for American Archaeology, 
KW  - BOTANICA
KW  - ARQUEOLOGIA
N2  - The poppy seed recovery test is a simple and inexpensive means of determining the effectiveness and consistency of any particular botanical flotation system. By adding a know number of charred poppy seeds to a sample before it is processed, archaeologists can check for loss, damage, and inter sample contamination. Different systems, equipment, methods, and personnel tested since 1976 yield recovery rate percentages ranging from 6% to 98%. Such percentages provide a basis of comparison among widely differing flotation systems and enable the  archaeologist to decide which flotation system to use under particular logistical constraints.
ER  -