A study conducted over a period of two years in a Western Serbian valley included in situ identification of autochthonous plum cultivars. Observation and recording of their phenological and pomological traits were performed using IBPGR and UPOV methodologies. Fifteen cultivars derived from Prunus domestica L. and two cultivars derived from P. insititia L. were identified. Flowering started between 24 March and 7 April and fruit ripening between 12 July (Petrovača) and 16 September (Trnovača). Fruit weight ranged from 6.79± 0.018 to 36.62± 0.251 g and stone weight from 0.14± 0.002 to 1.95± 0.023 g. The cultivars were classified as being extremely small in terms of fruit size. Rounded fruit shape and light-yellow ground colour were dominant. Skin colour ranged from amber to black. Yellow green was a dominant flesh colour and medium flesh firmness predominated. The fruits of the above cultivars could be processed, particularly into plum brandy, or they could be used fresh or dried. The selected plum cultivars can be used both in breeding programmes and as rootstocks as well as in further disease-related systematic studies under field and laboratory conditions.

In situ selection of vineyard peach (Prunus pérsica spp. vulgaris Mill.) genotypes was conducted in 2006 and 2007 in the region of Kfusevac (Central Serbia). Identification, observation and recording of the phenological and pomological properties of the highest-quality genotypes were carried out. Twenty-eight genotypes of the highest quality were selected out of 2093 genotypes, based on biological and pomological properties, and compared to those of cv. Redhaven (control). The onset of flowering varied (April 7-21), being early in two genotypes and late in one genotype, as compared to Redhaven, while 25 genotypes showed an intermediate flowering date, as Redhaven did. Campanula flowers were found in six genotypes, as in Redhaven, and the rosaceous type in 22 genotypes. All genotypes showed late harvest time in relation to Redhaven. Fruit weight and stone weight ranged between 10.23 ±0.5 to 78.03±3.6 g, and 1.91 ±0.1 to 5.40±0.9 g. Fruits were predominantly rounded, while the stones were ovoid. The selected vineyard peach genotypes showed favorable phenological and pomological properties that can be used in further breeding programs.

Se realizó la recolección in situ de genotipos de durazno nativo de los Balcanes (Prunus pérsica spp. vulgaris Mili.) en 2006 y 2007, en la región Krusevac (Serbia Central). Se efectuó la identificación, la observación y el registro de las propiedades fenológicas y pomológicas de los genotipos de más alta calidad. De 2093 genotipos se seleccionaron 28 de la más alta calidad con base en las propiedades biológicas y pomológicas, para compararlos con la la cv. Redhaven (testigo). El inicio de la floración varió (7-21 de abril), siendo temprana en dos genotipos y tardía en un genotipo, comparado con Redhaven, mientras que 25 genotipos mostraron una fecha de floración intermedia, como Redhaven. Se encontraron flores campanuladas en seis genotipos, como en Redhaven, y de tipo rosáceo en 22 genotipos. Todos los genotipos tuvieron un periodo de cosecha tardío respecto a Redhaven. El peso de los frutos y de los huesos osciló entre 10.23±0.5 y 78.03±3.6 g, y 1.91±0.1 y 5.40±0.9 g. Los frutos fueron predominantemente redondos, mientras que los huesos fueron ovoides. Los genotipos de durazno nativo seleccionados mostraron propiedades fenológicas y pomológicas favorables, y se pueden usar en programas de reproducción.

Dois anos de ensaios (2006-2007) sugeriram que o uso deóxido cálcio (CaO) em solos ácidos aumentou o pH do soloe o rendimento das cultivares de morango, Marmolada, Selena e Senga Sengana, sob as condições ambientais de Cacak (oeste da Sérvia). O rendimento mais elevado foi obtido quando CaO foi aplicado na quantidade de 750 kg ha-1. O aumento da quantidade para nível até 1500 kg ha-1 não mostrouaumento correspondente do rendimento; o resultado foi umaligeira queda em comparação com o rendimento máximo obtidoa 750 kg ha¹. Globalmente, os resultados a taxas superiores a 750 kg ha¹ foram ainda mais elevados do que no controle e no tratamento empregando quantidade mais baixa de 250 kg ha-1 de CaO.

Two-year trials (20062007) suggested that the use of calcium oxide (CaO) on acid soils increased soil pH and yields in strawberry cultivars Marmolada, Selena and Senga Sengana, under the environmental conditions of Cacak (Western Serbia). The highest yield was obtained when CaO was applied at 750 kg ha-1 rate. Further increase in rate up to 1,500 kg ha-1 did not show corresponding increase in yield; the result was a slight yield drop compared to the peak yield shown at 750 kg ha¹ rate. Overall, yields at rates above 750 kg ha¹ were still higher than control and in the treatment employing lowest CaO application rate of 250 kg ha-1.