PROBLEM TO BE SOLVED: To provide a very small amount of adjusting device and enable a very small amount of adjustment every roll type feeding device of each row in preparation for the occurrence of variations in the amount of fertilization/sowing in each row.SOLUTION: An amount-adjusting mechanism of a roll type feeding device is characterized as follows: a sliding roll structure A is fixed in a feeding drive shaft 3； the feeding drive shaft 3 is continuously installed with a multi-row adjusting handle 1 of a multi-row adjusting handle structure C in coordination with an amount of delivery； the feeding drive shaft 3 is made to slide by the multi-row adjusting handle 1 and a roll opening degree of the sliding roll structure A for the multi-row can be adjusted； and further, a fine adjusting mechanism B for enabling fine adjustment of the amount of delivery every each sliding roll structure A is provided along with the sliding roll structure A capable of adjusting multi-rows simultaneously by the multi-row adjusting handle 1.SELECTED DRAWING: Figure 7【課題】各条毎における施肥・播種の量にバラツキの発生に備え、各条のロール式繰出装置毎に微量調整装置を設けて微量調整を可能とする。【解決手段】繰出駆動軸３に摺動ロール仕組Ａを固定し、該繰出駆動軸３と、繰出量を調整する多条調整ハンドル仕組Ｃの多条調整ハンドル１とを連設させ、該多条調整ハンドル１により繰出駆動軸３をスライドさせて、多条分の摺動ロール仕組Ａのロール開度を調整可能とし、該多条調整ハンドル１により多条を同時に調節可能とした摺動ロール仕組Ａに、更に、各摺動ロール仕組Ａ毎の繰出量を微調整可能とする微調整機構Ｂを併設した。【選択図】図７
