A field experiment was carried out in a randomized complete block design (R.C.B.D) to study the effect of inoculation with R. leguminosarum at two levels (with and without inoculation) The compost made from azolla plant interaction between them efficiency root nodule formation growth yield faba bean grown gypsiferous soil after being isolated identificated by phenotypic, biochemical molecular m...

agh darreh tailing dam located in 23 km north of takab, west azarbayjan province is used for disposal of mine tailings. the tailing dam and its reservoir were constructed on gypsiferous marlstones. this is emphasis on geotechnical and environmental importance of the site. although construction of dams on gypsum rocks were not yet prohibited, but the dissolution of gypsum in contact with water i...

a knowledge of soil surface conditions, especially desert crust, salt crust and desert varnish is useful for improving classification of remotely sensed data. desert crust can generate high levels of reflectance, similar to those areas with high salt concentration and non-saline soil. therefore, soil surface crusts might bias thematic remote sensing of soils. in this study, we evaluated the eff...

Abstract An experiment was conducted to compare the unsaturated hydraulic conductivity (K) calculated by Jackson equation and van Genuchten for soils different in gypsum content treated with some soil conditioners. Two were used, gypsiferous (410 gm kg-1gypsium) clayey (435 kg-1 clay), mixed three levels 0, 50, 100%. The peat moss 0 and1%, polymer,0,1.and 2% without addition. Then, packed into ...

Pot experiment was conducted to study the alternate and fixed partial root zone drying on irrigation water use efficiency phosphorus absorption of corn (Zea mays L.) in a gypsiferous soil during spring growing season. The included three techniques, which were conventional (C1), alternating root-zone (APRD) (FPRD), levels phosphate fertilizer application (40, 80, 120 Kg h-1), for stages plant gr...