The publication of this Handbook was supported by the Russian Federation

Vorobieva, Lyudmila Andreevna – Doctor of  Biological Sciences, Honorary Professor of  the 
M.V. Lomonosov Moscow State University (MSU) (Moscow, Russia), specialist in the field of  soil 
acidity and alkalinity, analytical chemistry and theory of  the mobility of  chemical elements in soils. 
E-mail: [e-mail]
Vorotyntseva, Lyudmila Ivanovna – Candidate of  agricultural sciences, National Scientific 
Centre  ‘Institute  of   Soil  Science  and  Agrochemistry  Research  named  after  A.N.  Sokolovsky’ 
(Kharkiv,  Ukraine),  specialist  in  the  field  of   soil  conservation,  ameliorative  pedology  and  the 
integrated management of  land and water resources. E-mail: [e-mail]