Author: Tatyana Yoncheva, Dimitar Dimitrov, Anatoli Iliev
soil
4. Determining the Consistency and the Breaking down of Soil by Rotary Cultivation on Mountainous Terrains
Author: Dimitar Kehayov
6. Factors causing the development of water erosion of soil in vineyards
Author: Lukyanov Alexei Alexandrovich
36. Estimate of the soils in the region of Saedinenie – the district of Plovdiv for rice growing
Author: Ivanka Toromanova, Rada Popova, Tonia Georgieva
7. Selenium status in soil and wheat grain of northeast region of Bulgaria
Author: Stefan Krustev, Violina Angelova, Penka Zaprjanova, Margarita Nankova, Krasimir Ivanov