USDA Department of Agriculture

USDA Department of Agriculture

Science Facts Written by USDA Department of Agriculture


Inventor: George Washington Carver

George Washington Carver, born a slave in 1864 (approximately), contributed significantly to agricultural research. Although he was orphaned as an infant, endured hardship in pursuit of his education, ... Continue reading


Nematodes Are Everywhere

Nematodes are simple worms consisting of an elongate stomach and reproduction system inside a resistant outer cuticle (outer skin). Most nematodes are so small, between 400 micrometers to 5 mm long, ... Continue reading

Soybean cyst nematode female (large lemon-shaped) with egg mass. Eggs are also retained inside the female body, which becomes a resistant structure capable of surviving harsh environmental conditions for several years. The diameter of the mature female is approximately 300 micrometers.