No-till direct seeders are specifically engineered to plant seeds into undisturbed soil without prior tillage, typically using coulters or disc openers to cut through crop residue. Conventional seeders and planters that require a prepared seedbed are classified under 843239. The design of the soil-engagement mechanism — and whether the machine is marketed and used for no-till or minimum-till systems — is the key classification factor.

Lawn and sports ground rollers are explicitly included in heading 8432 alongside agricultural and horticultural soil preparation machinery. They are not classified under sports or recreation equipment headings. Parts for these rollers are covered under 843290 along with parts for the other machinery in the heading.