Browsing by Author "Khaledian, Mohammadreza"
Now showing 1 - 2 of 2
- Results Per Page
- Sort Options
Item No-Tillage impacts on soil hydraulic properties compared with conventional tillage(Uludağ Üniversitesi, 2012-10-11) Khaledian, Mohammadreza; Mailhol, Jean-Claude; Ruelle, PierreSoil hydraulic properties are very important in precision irrigation, water and solute transport and irrigation scheduling. Tillage can change near surface soil hydraulic properties. In this study Beerkan method was used to better understand tillage and no-tillage impacts on transmission properties of topsoil. Beerkan is a simple in situ method using a single ring to measure infiltration rate. This method depends on an algorithm namely BEST to estimate soil hydraulic properties. This study was carried out at Cemagref experimental station in Montpellier in the South-eastern France. Three different infiltration measurement series were done in both no-tillage and conventional tillage treatments. The first infiltration measurement series was performed after harvest of durum wheat; the second one was performed after sowing of corn and finally the last one was performed after the harvest of corn. By using those three series as input data, BEST model estimated saturated hydraulic conductivity (Ks), sorptivity, the mean characteristics of hydraulically functional pore size and capillary length. The results indicate that after harvest, hydraulic properties were not significantly different; however after sowing of corn, Ks was significantly higher in CT system (p<0.05). These conditions should be taken in account to perform irrigation, fertilization and agrochemical agent applications.Item Yield and energy requirement of durum wheat under no-tillage and conventional tillage in the mediterranean climate(Uludağ Üniversitesi, 2012) Khaledian, Mohammadreza; Mailhol, Jean-Claude; Ruelle, PierreA key principle of no-tillage (NT) system is the retention of crop residues on the soil surface to preserve soil water for crop growth. In response to the negative impact of soil degradation processes under conventional tillage (CT) systems that are based on soil tillage, NT systems without tillage practices and with protective cover of crop residue are being developed in many parts of the world. Apart from the positive effects on soil conservation and sustained land productivity, another major impact of NT is decreasing labor costs, generally leading to higher income and a better standard of living for the farmers. However NT is a successful system especially in the South of America, but the impacts of this system in the Mediterranean climate especially in the south of France is less well known; so that this study has been carried out within the scope of a European project. Durum wheat was sown for two years under two tillage treatments i.e. CT and NT. Time requirement and fuel consumption in these two systems were measured. The results show that the crop production is higher in CT system, while work duration and energy requirement is lower in NT system.