Plant Physiology

Plant Physiology (Biology 327) - Dr. Stephen G. Saupe; College of St. Benedict/ St. John's University; Biology Department; Collegeville, MN 56321; (320) 363 - 2782; (320) 363 - 3202, fax; ssaupe@csbsju.edu

Maple Sap Exercise

The data in Table 1 were published by Marvin et al (1967; Forest Science 13: 346 - 351). Transfer these data to a spreadsheet such as Excel. Then answer the following questions:

Questions:

What was the mean sugar concentration in the trees that they studied? (show your data/work)
What was the mean sap volume in the trees that they studied? (show your data/work)
For each tree, calculate how much syrup could be made from the sap that was produced? (show your data/work)
Do these data indicate a correlation between sugar concentration and sap volume? (append your graph)

Table 1. Sugar concentration and sap volume for 27 maple trees over 14 years
[Sugar] %	Total Sap Volume (liters)
2.98	1571
3.18	1474
2.99	1293
3.05	1181
3.24	1313
3.57	155
2.96	1166
2.72	1205
2.83	1347
2.61	1376
2.83	934
2.65	812
2.69	902
2.60	823
2.55	1011
2.56	1139
2.34	958
2.37	780
2.25	953
2.33	928
2.21	888
2.25	878
2.32	757
2.49	677
2.21	645
2.09	592
2.54	499