Effects of tillage systems on physical properties of a cohesive yellow argisol in the northern state of Espírito Santo, Brazil

摘要: Tillage systems are a key element of the technology crop production, both with view to yield and from perspective soil conservation sustainability production system. The aim this paper was evaluate effects five tillage on physical properties cohesive Yellow Argisol. experiment installed in field January 21, 2011 lasted 260 days, an area previously used as pasture Brachiaria grass without liming or fertilization, but irrigated by low pressure spray treatments, replications randomized block design, consisted of: 1) disk plow (twice) + harrow ridge-furrow (raising ridge along planting row), 135 days after transplanting (DP RID); 2) no 3) subsoiler (SB); 4) scarification three shanks plant row SPR); 5) total STA). In all systems, furrows were mechanically opened for papaya plants. After mechanical resistance penetration determined, followed moisture, mean weight diameter (MWD), geometric (GMD), bulk density (BD), macroporosity (Ma), microporosity (Mi), number fruits per plant. There differences (PR) between treatments. more effective decrease RP distance 0.35 m plants, perpendicular row. scarifier resulted lower PR than DP SB, even at depth 0.40 m, it greater distances All induced 2.0 3.0 MPa highest concentration tree roots (0-0.25 m), improving conditions depth. statistical difference among treatments BD, Ma, Mi, MWD, GMD 0.20 m. changed most intensely use scarification, reduced forest subsoiler, did not improve rhizosphere. Reduced other which differ each other.