rare devices 1- Spectral emission device (plasma) for determination of major, minor and heavy elements in soil, plants, water, and manure. 2- Chromatographic analysis of liquid organic compounds. 3- Chromatographic analysis of solid organic compounds. 4- Atomic absorption device. 5- Electron microslope, fluorescent microscope. 6- ELISA device. 7- GC devices. 8- Electrophoresis, PCR. 9- Membrane pressure device for estimating soil water constants and constructing the . curve