Effect of conventional and conservation tillage with management residue on some of Soil physicochemical properties in wheat.

In order to study the effect of conventional and conservation tillage with management residue on wheat physiological properties ,a field experiment was conducted in 2013-2014 at Mashhad Agricultural and Natural Resources Research center of Razavi Khorasan province. This experiment was arranged in a split plot design based on randomized complete block with three replications. Main plots were tillage systems: 1) conventional tillage, 2) reduced tillage and 3) no tillage; subplots were management residue: 1) 0%, 2) 30% and 3) 60% residue. The results showed that tillage systems had significant effect on Mycorrhizal colonization(spore), soil temperature, Water-holding capacity of the soil, porosity. The highest Mycorrhizal colonization (spore)(72.88), Water-holding capacity of the soil (21.59%), porosity (62.09%), were obtained from no-till method. Residue management were significantly different effect on Mycorrhizal colonization(spore), soil temperature, Water-holding capacity of the soil, resistance to penetration, porosity. The highest grain yields were obtained under no-till (6912.2 kg/ha) and 60% residue treatment (6980.8 kg/ha). It is concluded that conservation tillage with more residue aboveground could improve wheat yield and some of soil physicochemical properties