Browsing by Author "Arvas, Osmetullah"

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Assessment as Establishing Fertilizer of Biosolid in a Sod Establishment With Creeping Red Fescue (Festuca Rubra Var. Rubra)
(Foundation Environmental Protection & Research-fepr, 2011) Celebi, Seyda Zorer; Arvas, Osmetullah; Celebi, Rafet; Yilmaz, Ibrahim Hakki
This study was carried out to determine the assessment as establishing fertilizer of biosolid in a sod establishment with creeping red fescue (Festuca rubra var. rubra) in Van in 2007-2008 years. In this study carried out using randomized complete-block design with three replications, it was evaluated the doses of 3, 6, 9 and 12 t/da biosolid (sewage sludge) and application as establishing fertilizer of farmyard manure that was used as a control. In the study, criteria such as plant height, green grass yield, plant covered area, weed rate, color and turfgrass quality of creeping red fescue were evaluated. In the result of study, in observations at the first period of primary year, plant height, green grass yield and plant-covered area values were found to be a low in applications where high doses of biosolid were used and at the further periods, these values were found to be a high. Color and turfgrass quality criteria in fields used as establishing fertilizer of biosolid give generally the best results according to fields used the farmyard manure in each observation period. In the result of this study, it has been considered that biosolid was increased the turfgrass performance of creeping red fescue and was an important alternative to a farmyard manure in establishing stage.
The Effect of Sewage Sludge and Chemical Fertilizer on Natural Pasture's Yield and Botanical Composition
(Wfl Publ, 2011) Arvas, Osmetullah; Celebi, Seyda Zorer; Yilmaz, Ibrahim Hakki
Meadows converted into poor quality pastureland, as a result of early and over grazing, must regained their productive capacity. Since sewage biosolid (sewage sludge) contains high ratio of organic matter and nutrients, its use as fertilizer has become widespread. The aim of this research is to investigate the usability of waste of sewage biosolid (SB) as fertilizer as an alternative to chemical fertilizers in amending the poor quality pastureland. In this study, in the first experiment 25, 50, 75 and 100 ton ha(-1) year closes of sewage biosolid (SB) and in the other one 50(N-1) +25(P-1), 100(N-2) +50(P-2), 150(N-3) +75(P-3), 200(N-4) +100(P-4) kg ha(-1) year doses of chemical fertilizers (CF) were applied to investigate their effects on yield and botanical composition. The experiment was conducted in complete block design with three replications in the same plots during two years. While the rate of contribution of grasses to the hay was increasing, rate of legumes was decreased by biosolid applications. In terms of biological diversity, the most stable botanical composition was reached by application of 25 ton ha(-1) year doses of biosolid and 50 kg N ha(-1)+25 kg P2O5 ha(-1) doses of chemical fertilizer. Green herbage, hay and crude protein yield and crude protein ratio were more increased by biosolid application. The highest yield was obtained from 75 ton ha(-1) year doses of biosolid and 150 kg N ha(-1) +75 kg P2O5 ha(-1) doses of chemical fertilizer. It was concluded that in similar ecological conditions, lowest doses of sewage sludge provided herbage with equal yield and high quality as the highest doses of chemical fertilizers.
Effect of Sewage Sludge and Synthetic Fertilizer on Ph, Available N and P in Pasture Soils in Semi-Arid Area, Turkey
(Academic Journals, 2011) Arvas, Osmetullah; Celebi, Seyda Zorer; Yilmaz, Ibrahim Hakki
Activated sewage sludge from the aerobically-digested treatment and synthetic fertilizer were used to determine total N, available P and pH in different soil depth of pasture in semi arid ecological condition, in Van, Turkey. The study was carried out in a completely randomized block. Four treatment of sewage sludge, one treatment of synthetic fertilizer and no treatment as a control were used in two consecutive years. Soil samples were collected from surface soil (0 to 20 cm) and subsoil (20 to 40 cm) 11 months after SS (sewage sludge) and TSP (triple super phosphate) application and 7 months after AN application for both years. By using sewage sludge and synthetic fertilizers treatments, surface and subsoil pH decreased. The decreases of pH in SF and control plots in both soil depths in 2008 were attributed to root biomass. Although, sewage sludge contains less amount of nitrogen than synthetic fertilizer does, it enabled nitrogen detection in both soil depths for a longer time and in a higher amount. While an increase in the amount of nitrogen in surface soil and subsoil was determined in 2007, a decrease in these was determined in 2008 in both depths. Amount of subsoil available phosphorus increased more by sewage sludge applications. However, amount of surface soil available phosphorus increased more by sewage sludge applications in 2007, while it increased more by synthetic fertilizer application in 2008. The lowest pH value, highest amounts of total N and available P was obtained by higher doses of sewage sludge. However, when long time applications and mineralization process were considered, sewage sludge's dose of 2.5 ton/ha(-1) ya(-1) can be said to provide more beneficial results than the synthetic fertilization's highest dose which is suggested for pastures and meadows.