Show ROTATE TO PREVENT DISEASE aliments ailments increase in activity when same game crops are grown yearly on the same sama soli practically every farni farm I 1 rop crop Is attacked by some disease ivicic h In increase es ea in activity when the salad bamo crops are grown year after year ou oil tile tho same soil root rot be become conle 3 more pro walent when corn corn smut in n corn is intensified with continuous culture potatoes tire oro often attacked by several plant diseases if they are grown on the same soil sell or more fearls in succession with proper crop rotations the off diseases season do not hayo hato ua lie same ame host plant for two successive vears ars which prevents them from gaining a headway |