Разширено търсене
Автор да съдържа Penka Zaprjanova
Каталог "Статии" | Списание
DTPA-extractable micronutrients in soils of Southern Bulgaria
(2019)
Penka Zaprjanova; Gergana Hristozova
Каталог "Статии" | Списание
Macroelement content and chemical composition of oriental tobacco varieties grown under the same agro-ecological conditions
(2018)
Penka Zaprjanova; Gergana Hristozova
Каталог "Статии" | Списание
Microelement content of oriental tobacco varieties grown under the same agro-ecological conditions
(2018)
Penka Zaprjanova; Gergana Hristozova
Каталог "Статии" | Списание
Selenium status in soil and wheat grain of northeast region of Bulgaria
(2018)
Каталог "Статии" | Списание
Defining of the mobile forms of Pb and Cd acid soils
(2004)
Violina Angeolova; Penka Zaprjanova; Krasinir Ivanov