Investigation and determination of the most appropriate tillage methods and their application conditions on irrigated wheat in various areas of Iran

Each year in different provinces of the different methods used for wheat seedbed preparation. The effects of tillage systems on soil structure, soil and water conservation, pollution, weeds and pests in the field, soil organic matter decomposition rate, activity of microorganisms, soil temperature, seed germination and emergence, and the efficiency of nutrient uptake use of fertilizers by plant roots, plant growth and ultimately crop yield have been considered special.block) in the national plan in five region in the country and was studied for three years running. We have evaluated treatments in ways that devices are available for farmers are the main areas. Treatments were considered included the following methods: 1 - tillage with plow moldboard and disc 2 - tillage with chisel plow and disc 3 - tillage with disc 4 - tillage with plow moldboard and Rotivator 5 - tillage with a crusher to plow back and Disc 6 - tillage with a chisel with a stem crusher and disc 7- Furrower tillage with no blade 8 - no tillage. Parameters of soil bulk density, cone index, soil, percentage emergence, emergence rate index and yield, were measured.cover and cultivated land can be prepared with this method.aspects of conservation tillage is recommended according to local conditions. Be reminded that high intensity with low evapotranspiration irrigation efficiency in surface irrigation of agricultural problems in Iran, especially in dry areas are. Increase in irrigation efficiency in surface irrigation and management methods to increase the level of cultivation and increase farmers' incomes could be helped.2 years in the crop rotation of wheat - corn were investigated. To test this, in a randomized complete block design and treatments implemented during the test plots was fixed. During two years of wheat 2 times and 2 times the corn was planted. The method of cultivation to atmospheric and water use efficiency than conventional stack of shows.However, the intensity of evaporation of the year (first year) is less than atmospheric and stack method does not induce a reduction in water use efficiency.