Browsing by Author "Yarilgaç, T."

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The Effects of Sewage Sludge Applications on the Yield, Growth, Nutrition and Heavy Metal Accumulation in Apple Trees Growing in Dry Conditions
(TUBITAK, 2003) Bozkurt, M.A.; Yarilgaç, T.
The effects of various sewage sludge (biosolid) rates and a single dose barnyard manure application on the fruit yield, growth, nutrition and heavy metal accumulation of apple trees were investigated. The experiment was conducted using a completely randomized design with 4 replicates in dry conditions in Van, in the East Anatolia region of Turkey in 2000 and 2001. Sewage sludge was added to the soil at the rates of 0, 10, 20, 40 and 60 kg tree-1. Barnyard manure was applied to the soil at a rate of 25 kg tree-1. Two years' data showed that the addition of sewage sludge to calcareous soil significantly increased fruit yield, cumulative yield efficiency, shoot growth and leaf N, Mg, Fe, Mn and Zn concentrations at the end of the study. These increases were generally lower with barnyard manure applications. The sewage sludge and manure applications did not cause any significant increase in tree trunk girth and P, K, Ca, Ni, Cr and Cd concentrations in leaf samples. Leaf Fe, Mn and Zn concentrations increased at the highest sludge rate from 88.0 to 105.3, from 44.2 to 75.5 and from 9.2 to 10.4 mg kg-1, respectively. The 2-year results of this study demonstrated that sewage sludge applied to apple trees did not cause toxicity in the leaves. However, long-term sewage sludge application may result in the accumulation of some heavy metals in the soil and their entry into plants in quantities above the maximum permitted concentrations.
Fruit Characteristics of Selected Chestnut (Castanea Sativa Mill.) in Inebolu (kastamonu/Turkey) District
(International Society for Horticultural Science, 2009) Yarilgaç, T.; Çolak, F.; Balta, M.F.
In the Inebolu (Kastamonu) district of the West Black Sea Region, there are many chestnuts (Castanea sativa Mill.) trees. This study was carried out to determine promising chestnut genotypes and fruit samples from 62 trees representing the population that was investigated. The selected superior chestnuts had a nut weight between 5.68±0.35 g and 11.94±0.33 g, a kernel weight between 4.97 g and 9.79 g, a kernel ratio between 77.33% and 86.25%, shell thickness between 0.25 mm and 0.44 mm, fruit width between 16.11±0.47 and 20.48±0.87 mm, fruit length between 25.91±0.53 mm and 34.93±0.47 mm and fruit height between 23.87±0.45 mm and 34.89±0.28 mm and number of nuts/kg between 83 and 169. In addition, Chestnuts were determined as fruit characteristics brightness and harshness of shell, color of shell, color of kernel, peeling of testa, number of nut/kg. The data were evaluated by the weighted-rankit method. Relative scores of the chestnuts for general quality, nut size and suitability to chestnut paste were examined.
Kernel Sugar Components of Turkish and Foreign Apricot (Prunus Armeniaca L.) Varieties
(Chemical Publishing Co., 2008) Yarilgaç, T.; Bostan, S.Z.; Karadeniz, T.; Balta, M.F.
This study involves in determining kernel sugar contents of Turkish apricot varieties (Kabaasi, Sakit, Alyanak, Tokaloglu, Salak, Hasanbey, Hacihaliloglu and Sekerpare) and foreign apricot varieties (Paviot, Colomer and Thyrinte) grown in Van (eastern Anatolia, Turkey). The sugar contents of kernels were detepted by HPLC. The main sugar was sucrose in the majority of apricot varieties. Kernels of Turkish varieties contained 2.20-5.30 g/100 g sucrose, 0.40-3.40 g/100 g maltose, 0.90-3.64 g/100g glucose and 0.57-5.58 g/100 g fructose. Sugar contents of seeds belonging to foreign varieties were 3.30-4.67 g/100 g sucrose, 1.50-2.52 g/100 g maltose, 3.38-3.72 g/100 g glucose and 1.86-2.93 g/100 g fructose. Sugar contents significantly, differed by varieties. In addition, positive correlation coefficients were computed among kernel sugars.
Morphological and Pomological Traits of 'kutahya Sour Cherry (Prunus Cerasus) Grafted on Rootstocks of Prunus Avium and Prunus Mahaleb in Van Conditions
(2002) Yarilgaç, T.; Kadan, H.
A study was conducted during 1999-2000 on fruits and trees of 'Kutahya' sour cherry (Prunus cerasus L.) grafted on [Prunus avium (L.) L.] and Prunus mahaleb L. rootstocks to determine pomological, morphological and chemical characteristics under climatic conditions of Van, Turkey. Its full flowering period was 10 May and 5 May on Prunus avium and 6 May and 8 May on Prunus mahaleb in the first and second year respectively. In the first year, its fruits harvested on 5 July had 2.97 g fruit weight, 32.46% titratable acidity, 17.48% soluble solids, 1.13 (kg/cm2) fruit flesh firmness on Prunus mahaleb and 2.47 g fruit weight, 31.18% titratable acidity, 18.25% soluble solids and 0.62 (kg/cm2) fruit flesh firmness on Prunus avium. In the second year, fruits were harvested on 3, 5, 7 and 10 July on Prunus mahaleb, and on 3, 5 and 7 July on Prunus avium, 'Kutahya' had 3.08-3.94 g for fruit weight, 2.55-3.07% for acidity, 15.72-16.53% for soluble solids and 1.16-1.53 (kg/cm2) for fruit flesh firmness on Prunus mahaleb in the second year, and 2.59-3.28 g for fruit weight, 2.47-2.75% for acidity, 13.60-15.30% for soluble solids and 1.27-1.53 (kg/cm2) for fruit flesh firmness on Prunus avium. On both rootstocks, fruit skin and fruit flesh skin were dark coloured and fruit flesh colour was light red or red. The harvest time of this cultivar was later than the other parts of Turkey because of heavy climatic conditions and altitude of Van, and this can be considered as an important local advantage in terms of harvest season extending its marketing life.