The publication of this Handbook was supported by the Russian Federation

The land registry is based mainly on the large-scale soil assessment data and a generalized 
evaluation system. Hence, it has the same shortcomings as the above-described information 
source and fails to record rapid changes in soil quality.
3)  Information from 
the agrochemical records of agricultural lands (10 agrochemical 
records of  soils since 1964) are compiled and published in the National report on the state 
of  soil fertility. However, methods of  such agrochemical soil assessments differ from those 
used in irrigated soil assessments, for instance, mixed soil samples are taken without a 
spatial reference to a geographic coordinate system and the particle-size composition of  
soils is not taken into account. The resulting data characterize a whole field, but not soils 
per se and, therefore, don’t reflect any irrigation-induced changes in soil cover.
4)