Changes in Senna obstuifolia Germination Requirements over 12 Months under Field Conditions
Figure 2
Senna obtusifolia percentage germination in response to constant and fluctuating () temperatures with after-ripening following maturation in late October 2003. One half of the S. obtusifolia seeds was buried in soil 10 cm deep in Spring 2004; therefore, Summer and Fall evaluations included seeds from the soil surface and buried (B) ones. The fluctuating temperature experiment did not include a mean temperature of . Means with different lowercase letters within a month, thermal amplitude (constant or fluctuating), and burial depth are significantly different at .
