Fig. 8. Cross-correlograms of soybean cyst nematode cyst population density and percentage sand (solid line) or clay (dashed line) in the soil in (A–D) Field A and (E–H) Field B. (A and E) planting 1999, (B and F) harvest 1999, (C and G) planting 2000, and (D and H) harvest 2000. Linear correlation coefficients for cyst density with sand and clay are indicated.