V. Koteva Abstract. The investigation was carried out in a field certified for organic agriculture, on soil type Pellic vertisol (FAO) during 2004 – 2012. The changes in soil acidity, total humus content and reserves of mineral nitrogen, mobile phosphorus and available potassium in so

N. Valchev, V. Yankova, D. Markova Abstract. Tomato leaf miner Tuta absoluta (Meyrick) (Lepidoptera:Gelechiidae) is a dangerous pest in tomato grown in greenhouses. The control of this pest is difficult because of the latent way of life of the larvae in the mines, high reproductive po

G. Delchev, N. Georgieva, I. Nikolova Abstract. With the purpose to study the stability of mixtures among preparations with different biological effect on the basis the grain yield in spring vetch a three-factor field trial was carried out during the period 2007-2009 in Institute of F

I. Saldzhiev, A. Muhova Abstract. Field trial on cotton (Vega cultivar) was carried out during 2007–2011 on leached vertisols under irrigation regime of sprinkling – 75 % of the field moisture capacity (FMC) for the soil layer of 0 – 40 cm. The trial included the following variants: f

T. Penev, Z. Manolov, I. Borissov, V. Dimova, Tch. Miteva, Y. Mitev, V. Kirov Abstract. The investigation was performed in three Bulgarian free-stall cattle farms with different flooring types. The floor of farm A was covered with two rubber mat types, with and without abrasion lining

G. Delchev Abstract. During the period 2010 – 2012, on the experimental field of the Field Crops Institute, Chirpan was carried out a field experiment with durum wheat cultivar Elbrus (Triticum durum var. valenciae). A total of 24 variants were investigated. They include vegetat

V. Radev, I. Varlyakov, R. Mihaylov Abstract. An experiment was conducted to evaluate the effect of rations with different lipid and protein levels on total counts and generic composition of rumen ciliates, and bacterial cellulolytic activity in the rumen of yearling rams. Three ratio

V. Radev Abstract. To establish the effect of different dietary lipid and protein content un rumen fermentation in yearling rams, three rations have been tested. The main component in them was ground barley and meadow hay (ration I), plus a different lipid and protein source – sunflow

I. Valchev, N. Grozeva, L. Lazarov, D. Kanakov, Ts. Hristov, R. Binev, Y. Nikolov Abstract. The toxic effect of AFB in mulard ducks was evaluated through the changes in several blood parameters, namely uric acid, urea, creatinine, creatine 1 kinase, calcium, inorganic phosphate, sodiu

R. Shumkova, I. Zhelyazkova Abstract. The study was conducted in the spring and autumn of 2011 at the Experimental apiary of the Agricultural and Stockbreeding Experimental Station (ASES), Smolyan and at the private apiary of Mitev’s bee farm, Smolyan. For stimulating feeding of