ekS - Instytut Agrofizyki im. Bohdana DobrzaÅskiego PAN w Lublinie ...
ekS - Instytut Agrofizyki im. Bohdana DobrzaÅskiego PAN w Lublinie ...
ekS - Instytut Agrofizyki im. Bohdana DobrzaÅskiego PAN w Lublinie ...
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Fig. 55. S<strong>im</strong>plified functional diagram of the MIDL setup in MASTER<br />
configuration .....................................................................................114<br />
Fig. 56. Serial RS232C port terminal window with the MIDL system<br />
initial tests..........................................................................................115<br />
Fig. 57. Portable TDR meter, FOM/mts, for the measurement of soil water<br />
content using TDR technique as well as soil apparent electrical<br />
conductivity and temperature ............................................................121<br />
Fig. 58. Prototype of a handheld soil water content, salinity and<br />
temperature meter constructed with the application of modern<br />
components........................................................................................123<br />
Fig. 59. An example of the D-LOG/10/mts-controlled stand incorporating<br />
six D-MUX/10/mts 2-nd level multiplexers. Max<strong>im</strong>um amount of<br />
the controlled FP/mts (or FP/m) probes is 60. For clarity only a<br />
single D-MUX was linked with the D-LOG and a single probe<br />
was connected to each D-MUX when taking the picture ..................124<br />
Fig. 60. Example of an arrangement of the D-LOG/mts system able to<br />
scan 60 FP/m(ts) probes. All cables are laid about 30 cm beneath<br />
the soil surface to protect them against static electricity, UV<br />
radiation and rodents as well. FP/mts feeder cables (6 m) ................125<br />
Fig. 61. FP/m, FP/mts - Field Probe for water content, temperature and<br />
salinity of soil developed in the IAPAS, Lublin................................127<br />
Fig. 62. The principle of installation of the FP-type probes. In order to<br />
min<strong>im</strong>ize disturbances in the soil structure the probes are inserted<br />
into the soil via pilot holes, circularly distributed over the soil<br />
surface. The holes run slantwise and converge along a chosen<br />
vertical line. The cables are buried below the soil surface to<br />
protect them against the UV sun radiation as well as against<br />
rodents. ..............................................................................................127<br />
Fig. 63. A near-surface probe FP/mts/ns ........................................................129<br />
Fig. 64. Approx<strong>im</strong>ate region of influence of the FP probe, defined as a<br />
solid beyond of that changes in water content do not markedly<br />
affect readings of water content ........................................................130<br />
Fig. 65. Example of structure of a LOM/4/mpts based stand for recording<br />
instantaneous profiles of soil water content, capillary pressure of<br />
soil water, temperature and salinity (apparent electrical<br />
conductivity) from soil column(s), with application of a single<br />
MUX/8/mpts......................................................................................131<br />
Fig. 66. LP/ms - Laboratory miniProbe for soil water content and salinity<br />
measurement......................................................................................133<br />
148