Študije ostankov v tleh je treba predložiti, kadar je vrednost DT50lab večja od ene tretjine obdobja med uporabo in spravilom pridelka in kadar lahko pride do absorpcije ostankov pri pri naslednjem posevku, razen kadar je ostanke v tleh pri setvi ali sajenju naslednjega posevka mogoče zanesljivo določiti iz podatkov študij o razgradnji v tleh ali kadar je mogoče utemeljiti, da ti ostanki niso fitotoksični za, ali ne morejo pustiti nesprejemljivih ostankov v naslednjem posevku v kolobarju.
Soil residue studies must be reported where DT50lab is greater than one-third of the period between the application and harvest and where absorption by the succeeding crop is possible, except where soil residues at sowing or planting of a succeeding crop can be reliably estimated from the data of the soil dissipation studies or where it can be justified that these residues can not be phytotoxic to or leave unacceptable residues in rotational crops.