V. Atanasov, E. Valkova, G. Kostadinova, G. Petkov, Ts. Yablanski, P. Valkova, D. Dermendjieva Abstract. A survey and assessment of manganese (Mn) levels was carried out on the chain water – sediment – algae from 6 monitoring points, situated at three rivers and a dam with high anthro

K. Trendafilov, V. Valcheva Abstract. In conditions of combined field experiment the influence of liming with Ca(OH) in rates of 1,0, 2,5 and 5,0 t/ha on the input of nitrogen, phosphorus 2 and potassium in the leaves of fertility vines from varieties Sauvignon Blanc, Chardonnay, Cabe