. Effective farming; a text-book for American schools . Fig. 199. — Disc harrow. 223. Harrows. — For the purpose of following the plow and breaking up the clods and smoothing the surface soil, harrows are used. Disc, spring-tooth, spike-tooth, and blade harrows or Acme, are the common types. In choosing a harrow one 2g

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear