By Toma Shishkov
The Soils of Bulgaria deals a accomplished research of the features of soils and ideas on their significance. the aim of the booklet is to introduce readers to the soil tricky and ecology in Bulgaria. the quantity is split into three components. the 1st comprises historic evidence on soil study in Bulgaria, in addition to normal stipulations and elements of soil formation, whereas the second one applies an unique pedological process. The book’s 3rd half specializes in crucial details pertaining to land use/cover in Bulgaria. all the thirteen chapters bargains extra particularly with primary chemical and actual soil houses, techniques of soil evolution, outdated and sleek tactics, geographic distribution, weather conditions, topography, guardian fabrics, plant institutions, morphology and the connection with diversified type platforms. The interactions among soil prestige and administration also are highlighted. using the newest, statistically major information guarantees targeted conclusions. The booklet additionally encompasses a huge variety of charts and new illustrations. The Soils of Bulgaria is essential examining fabric for someone attracted to soil administration and agriculture in Easter Europe, from scholars to coverage makers and can be of specific curiosity for researchers within the field.
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About 40–50 % of the mineral nitrogen applied as a fertilizer was used by plants and the rest was lost in the form of gas. It was established that in the different regions of the country the biological fixation of atmospheric nitrogen had as a limiting factor an unfavorable ratio of nitrogen and phosphorous. It was also established that all soils in Bulgaria were poorly supplied with available forms of phosphorous for plants. Bulgarian soils had a comparatively high supply of potassium for plants; however, the main resource is at inextricable form.
Nikola Poushkarov Institute of Soil Science, Sofia (In Bulgarian) Rousseva S, Stefanova V (2006) Assessment and mapping of soil erodibility and rainfall erosivity in Bulgaria. In: Morel M et al. (eds) BALWOIS 2006 conference on water observation and information system for decision support, Ohrid, Republic of Macedonia. Book of abstracts (ISBN 9989-9594-1-2), pp 28–29. pdf. Accessed 23–26 May 2006 Rousseva S, Lazarov A, Stefanova V et al (2006) Soil erosion assessments in Bulgaria. In: Morel M et al.
16 1 General Facts of Soils in Bulgaria Fig. 14 Soil map of Bulgaria based on the digitized soil map at scale 1:1 million (Kolchakov et al. 1994) in compliance with the Revised Legend of the Soil Map of the World (FAOUNESCO-ISRIC 1990) Razgrad towns. 8 % or 1,300,000 ha of the deep soils are affected by moderate and severe erosion. Yearly soil loss for the country is 40,000,000 m3. Soils in the different regions of the country possess a number of provincial features related to the type of parent rocks and duration of weathering.