Browsing by Author "Cimrin, KM"

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The Effects of Sewage Sludge Applications on Nutrient and Heavy Metal Concentration in a Calcareous Soil
(Parlar Scientific Publications (p S P), 2003) Bozkurt, MA; Cimrin, KM
The objective of this study was to examine the effects of sewage sludge (biosolids) and barnyard manure on nutrient and heavy metal concentrations of calcareous soil at Van, Turkey and to estimate its ecological conditions during 2000 and 2001. Sewage sludge applied at five rates (0, 10, 20, 40 and 60 kg.tree(-1)) in an apple orchard on calcareous soil significantly increased the available "Olsen" P estimated by extraction with sodium bicarbonate, but also diethylenetriaminepentaacetate (DTPA)-extract-able Fe, Mn, Zn, Cu, Ni and total N, Zn and Cu concentrations at the end of the study. The pH of topsoil (0-30 cm depth) decreased from 8.6 to 7.8 at the highest application rate. Extractable P, Zn and total Zn and Cu concentrations of calcareous soil significantly increased at all depths in the profile. Sewage sludge application only increased total N, DTPA-extractable Fe and Ni concentrations of topsoil. Treatment with barnyard manure at one rate (25 kg tree(-1)) did not increase nutrient and heavy metal concentrations of soil as far as sewage sludge. Only DTPA-extractable Mn and total concentrations of Zn and Cu rose with manure application at the end of the experimental studies.
Humic Acid Applications To Lettuce Do Not Improve Yield but Do Improve Phosphorus Availability
(Taylor & Francis As, 2005) Cimrin, KM; Yilmaz, I
The effects of humic acid ( HA) and phosphorus ( P) applications on plant growth and nutrient content of lettuce, together with available soil phosphorus remaining after harvest were examined. The amounts of phosphorus used were 0, 120, and 240 kg ha(-1) and those of humic acid were 0, 100, 200, and 300 kg ha(-1). Phosphorus increased the nitrogen content of lettuce significantly (P< 0.01) while the application of humic acid did not have significant effect. Humic acid, phosphorus, and HA x P interaction increased the nitrogen content of lettuce significantly (P< 0.05). All effects were not significant for plant K, Ca, Mg, Fe, Cu, and Mn contents. Application of phosphorus decreased Zn content significantly ( P< 0.05). Increased amount of phosphorus caused significant increases in residual soil phosphorus (P< 0.01). It was concluded that the application of 120 kg ha(-1) of phosphorus together with 300 kg ha(-1) of humic acid was convenient for the head weight of lettuce.