FINAL REPORT

During the field research inventory and mapping on holes of rodent Midday gerbil in private
fences of local residents that engage in cultivation areas were conducted. There were 21 holes
in 10 m 2 area that were networked with small tracks. It was found outthat the main reason of
the species distribution was deficiency of water in the area. If water is evenly supplied
throughout the area, this species of rodent would move to its natural ranges and bio-top and its
destructive effects on crop and yields would be eliminated.
11. Summary of Field Research Results and Sample Analysis (M. Walther)
In comparison with all field data, water analytical data, measurements in the field,
climatologic data based on the Survey data of Khovd station and laboratory analyses data
there can be given an overview of the most suitable areas for rehabilitation of irrigated
agriculture from the ecological point of view:
‣ The best average values from the point of chemical soil composition and water supply
are given in the areas 4, 5 and 6. Water should not have been a problem (recently it is
reaching the area), if the distribution is regulated by intes –sum agreements or other
legal regulations.
‣ The brown soil of the areas 4, 5 and 6 is well drainable, not compacted and developed
on a thin sand sheet of aeolian sands. The observations of the physical character show
good conditions (soil air, depth of roots, porous structure, actual soil moisture etc).
‣ The area 2 on the eastern part of the Buyant Gol delta has very coarse and poor A-C-
Soils and high compacted soils in the eastern part (old lake bottoms of Khar Nuur).
From the ecological point of view this area can not be recommended for the
rehabilitation of irrigated agricultural use.
‣ The danger of remobilization of heavy metals is not given in all areas. Heavy metal
content is mostly lower than the geo-accumulation index based on the natural
background value of heavy metals in rocks.
‣ The risk of saltification is very low because especially the areas 4, 5 and 6 have an
inclination of a little bit more than 2 %.
‣ From the point of water supply we have to take into account that we have a surplus of
water in the area 3 (Khovd Gol) and in the areas 4, 5 and 6 water is actually led
directly into the in neighborhood. A distribution of the water in those areas has to be
regulated by the authorities.
86