Fig. 6. Cross-correlograms between (a and d) cysts [log₁₀(cysts 100 cm^-3 soil + 1)], (b and e) eggs per cyst [log₁₀(eggs per cyst + 1)], and (c and f) eggs [log₁₀(eggs 100 cm^-3 soil + 1)] in 1999 and 2000 in (a, b, and c) Field A and (d, e, and f) Field B. r = linear correlation coefficient.