mollis and a second extinct progenitor superimposed with ongoing genetic introgression from other species in Mentzelia section Trachyphytum. packardiae (8×) from the combination of M. mollis (4×) followed by the allopolyploid formation of M. Previous molecular studies have suggested a relatively old allopolyploid origin of M. packardiae are narrowly distributed plants occurring primarily in the Owyhee Desert of southeastern Oregon and southwestern Idaho. Globally accepted soil salinity classification systems such as US Salinity Lab Staff and FAO-UNESCO have been included. Diversified salinity assessment, mapping and monitoring methods, such as conventional (field and laboratory) and modern (electromagnetic-EM38, optical-thin section and electron microscopy, geostatistics-kriging, remote sensing and GIS, automatic dynamics salinity logging system) have been used and results are reported providing comprehensive information for selection of suitable methods by potential users. Procedures for field assessment of soil salinity and sodicity are described and factors to convert EC of different soil:water (1:1, 1:2.5 & 1:5) suspensions to ECe from different regions are tabulated and hence providing useful information to those adopting such procedures. A new relationship between ECe (mS/cm) and total soluble salts (meq/l) established on UAE soils has been reported which is different to that established by US Salinity Laboratory Staff in the year 1954, suggesting the latter is specific to US soils, therefore, other countries should establish similar relationships based on their local conditions. Causes of soil salinization and its damages, socio-economic and environmental impacts, and visual indicators of soil salinization and sodicity have been reported. A hypothetical soil salinity development cycle has been presented. In this chapter soil salinity (dryland and secondary) and sodicity concepts have been introduced to make it easier for readers. For sustainable management of soil salinity, it is essential to diagnose it properly prior to take proper intervention measures. It is also triggered with the impact of climate change. We also do reparing for ECEE MA 810, ECEE MA 150.01, ECEE MA 55.It is widely recognized that soil salinity has increased over time. Ecee thermax boiler photocell/ photoresistors 8209 Thermax boiler Ecee photocell/ photoresistors 8205ĥ. Ecee Thermax boiler controller MA 150.01Ĥ. Detector model 8300.įollowing models are available in this category:Ģ. Petercem gas burner control unit is also available which can be use with U. It utilizes the flame sensor with photo resistant cell models 8209, 8205. These controls are provided with amplifier for flame detection. These are control and safety equipment for oil burners. The suitable flame detectors are photocells. In case of non ignition of the burner, the equipment is automatically brought to interlock position after the safety time. We offer Petercem Boiler Burner Controllers which are capable of controlling and monitoring oil burners of capacity 30 kg to 350 kw output.
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