This research was done to find out the effect of increasing vermicompost application on yield of lettuce (Lactuca sativa L. var. crispa) plant. For this purpose Lactuca sativa L. var. crispa cv. Bellafiesta lettuce kind and Riverm Company vermicompost were used in this research. Four vermicompost doses (0 kg/ha, 4000 kg/ha, 8000 kg/ha and 12000 kg/ha) were applied to lettuce plant. According to the results, important increases of fresh weight, plant size, number of leaf, length and width of leaf for each plant and dry matter yield of plants were determined with increasing vermicompost applications. But the effects of Vermicopmost applications on some macro element (N, P, K, Ca and Mg) contents of plant were not found significant statistically.

Herein is reported the remediation of cadmium in agricultural soil using patience dock (Rumex patientia L.). Potted experiments were performed on the campus of Namık Kemal University in greenhouse conditions. The soil was classified to have a neutral pH, low lime, and to be deficient in organic matter. The available phosphorus and the exchangeable potassium concentrations of the soil were both adequate. The soil was found to have a clay texture. Cadmium was added to the soil at 100 mg/kg. Ethylenediaminetetraacetic acid (EDTA) was added at one of four concentrations during the growing season of the patience dock. The plants were harvested after two months. The yield of the roots and shoots of patience dock decreased with increased application of EDTA. However, the mass of cadmium in the roots and shoots increased with EDTA application. These changes in the plant properties were statistically significant at the 1% significance level. These results show that patience dock (Rumex patientia L.) is suitable for the phytoremediation of cadmium.

Journal of Advanced Agricultural Technologies

In this study, the effects of the increasing doses of vermicompost implementation [0 % (VC1), 3 % (VC2), 5 % (VC3), 7 % (VC4)] on some heavy metal contents of cucumber (Cucumis sativus L. have been investigated. With the increasing doses of vermicompost implementation, Cr, Co, Cd, Ni and Pb contents of cucumber decreased. While the Cr content of cucumber is 65.94 mg/kg with the implementation of VC1 (control) dose, it decreases to 20.58 mg/kg with VC4 dose. The plant’s Co, Cd, Ni and Pb contents decreases with the increasing doses of vermicompost implementation, as well, and, VC1and VC4 doses of vermicompost are determined as 7.66- 2.09, 1.05-0.71, 47.93- 14.57 and 15.68- 5.01 mg/kg respectively. These results revealed that vermicompost can be used as a fertilization program to protect the plant’s quality and to eliminate its heavy metal contents. On the other hand, the use of organic fertilizers such as vermicompost should be extended for the maintenance of soil productivity.

Disseminations of organic fertilizer use in olive sapling nursery is very important. When the saplings are developed well at the beginning, this will be important for root development after planting to land, decreasing the future yield lowness, and even obtaining large amount of high quality olive grain and oil, therefore studies about this subject are essential. In this study, Gemlik olive (Olea europaea L. cv. Gemlik) variety saplings were grown with applications of different doses of the vermicompost that is an organic fertilizer (0, 5, 10, 20 and 40%) to production material and single dose of chemical fertilizer which is used commonly by planters (100% production material + chemical fertilizer). The micro nutrients content of the production material were analyzed. According to the results, the micro nutrients analysis of the production material used for the growth of olive saplings at the 3rd and 6th months was significant. Fe, Cu, Mn, Zn and B values as the average of all treatments were 12309.56, 34.74, 625.66, 52.61 30.85 at the 3rd month and 12066.24, 28.60, 507.03, 47.40, 29.98 mg kg(-1) at the 6th month. In general, 40% vermicompost (VC) + 60% production material (PM) increased the micro elemental content. Use of vermicompost in production material can be said to increase quality of production material and positively affect nourishment of olive saplings and their developments. Vermicomposting is a simple biotechnological process of composting, in which certain species of earthworms (Eisenia foetida etc.) are used to enhance the process of waste conversion and produce a better product. The use of vermicompost is important for the sustainability of agriculture. These results showed that the effects of different organic material (vermicompost) applications on olive sapling properties are important.

Leafy parsley (Petroselinum crispum (Mill)) plant is an important source of Ca for human and 100 grams of leafy parsley plant provides 200-300 grams of Ca. This research was conducted to determine the different doses of calcium nitrate application on some macro and micro phytonutrient element contents of leafy parsley (Petroselinum crispum (Mill)) plant. For this purpose, the experiment followed randomized block experimental design with three replications in greenhouse conditions. 1.5 gm^-2 plant seeds sowed for each parcel. Four calcium nitrate application doses (I. dose: 0 ppm, II. dose: 15 ppm, III. dose: 30 ppm and IV. dose: 45 ppm) were applied. Parsley plants were harvested 75 days after of seed sowing. Some macro and micronutrient element (N, P, K, Ca, Mg, S, Fe, Cu, Zn and Mn) contents of plants were analyzed. According to the results, average total N contents of plant samples were determined as 3.93%, 3.96%, 4.01%, and 4.07%, respectively. Other macro elements were determined as follows: P (0.32 %, 0.33 %, 0.35 % and 0.33%), K (5.78%, 5.92%, 6.09% and 6.46%), Ca (0.67%, 0.76%, 0.78% and 0.79%), Mg (0.10%, 0.11%, 0.11% and 0.12%), and S (0.26%, 0.34%, 0.39% and 0.52%), respectively. Nevertheless, for some microelements, the contents were obtained as; Fe (59.06, 62.16, 65.01 and 72.07 mgkg^-1) Cu (27.62, 32.03, 38.90 and 39.80 mgkg^-1) Mn (24.70, 27.50, 29.03 and 31.87 mgkg^-1), and Zn (21.97, 23.30, 29.60 and 57.17 mgkg^-1), respectively. The increasing doses of calcium nitrate application resulted in increasing outcomes, which are statistically significant, for each of the nutrient elements.