Group 1, Natural resources & environment.
Item 1, 1998 17.650213.
Item 2, 2003 20.873474.
Group 2, Plants and their systems.
Item 1, 1998 32.172222.
Item 2, 2003 31.547092.
Group 3, Animals and their systems.
Item 1, 1998 23.7865.
Item 2, 2003 22.52856.
Group 4, Engineering & support systems.
Item 1, 1998 2.1335704.
Item 2, 2003 2.1362267.
Group 5, Food and nonfood products & processing.
Item 1, 1998 6.4470434.
Item 2, 2003 5.8992386.
Group 6, Economics, markets, & policy.
Item 1, 1998 6.6493855.
Item 2, 2003 4.87801.
Group 7, Human nutrition, food safety, and health.
Item 1, 1998 8.270552.
Item 2, 2003 9.543613.
Group 8, Family & community systems.
Item 1, 1998 1.569058.
Item 2, 2003 1.2913634.
Group 9, Research support.
Item 1, 1998 1.3214564.
Item 2, 2003 1.3024215.