Effects of Long Run Rotary Tilling on Soil Structure and Maize (Zea mays L) Root Growth

An experiment was conducted to examine the influence of soil aggregate size on maize root growth and development. The loamy samples resulted from different number passes rotary tilling experimental runs under controlled bin were selected. texture chosen in this study sandy loam. obtained after interval 10 (10, 20, 30, 40, 50, 60 passes) at moisture content 10.28 % (w.b). Soil collected kept for pot experiment. roots analysed 8DAE, 16DAE, 24DAE their early growth. Duncan’s multiple range tests effect showed decrease aggregates finer than 1.5 mm. decline length considerable 30 (40 passes:74.32cm, 50passes:63.77cm, 60passes:46.63cm).The declined 1.5mm attributed continuous deteriorated structure hindered starts degrading with excessive application rotavator which turn develops compacted layers 20-30cm sub depth.