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Due to its importance for organic agriculture, one of the most important agricultural production systems, various sources have been proposed to increase soil organic matter content. Vermicompost is one of those sources known as the resistant last form of farmyard manure which is degraded by earthworms. Soil organic matter or humus and their compounds are nutrient sources that increase physical, chemical and biological quality of soil. Humus and humus compounds improve soil physical, chemical and biological quality parameters increasing rhizosphere aeration and water holding capacity, rehabilitating soil structure, providing plant nutrients and constituting natural media for microorganisms with their regulative effects on soil reactions. In this study, the effects of vermicompost on yield and some growth parameters of lettuce were investigated. For this purpose, a random block designed experiment with 5 different applications was conducted in 3 replicates. The applications were control, vermicompost applications of 100 kg, 200 kg and 300 kg per decare and conventional fertilization. According to the results obtained, yield and growth parameters were improved by vermicompost application when compared to control and conventional fertilization. As a result of this study, it was concluded that 300 kg vermicompost/da is a promising application in lettuce production for optimal yield and soil improvement.

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Bu çalışmada, bor uygulamalarının şeker pancarında azot, fosfor, potasyum konsantrasyonu ile verim üzerine etkileri araştırılmıştır. Çalışma Gaziosmanpaşa Üniversitesi Ziraat Fakültesi arazisinde toprak taksonomisine göre tipik ustifluvent alt grubuna ait topraklar üzerine kurulmuştur. Deneme, tesadüf blokları deneme desenine göre 3 tekerrürlü olarak 4 farklı dozda bor (0, 0,18, 0,27 ve 0,36 B kg da The Effects of Boron Fertilizatıon to Yield Properties in Sugar Beet (Beta vulgaris L.) A R T I C L E I N F O A B S T R A C T Research ArticleReceived 03 January 2017 Accepted 18 May 2017In this study, the effect of agribor fertilizer (18% pure B) on yield features of sugar beet were investigated. The study was conducted on ustifluvent subgroup soils according to soil taxonomy of agricultural faculty of Gaziosmanpaşa university. Randomized block experiment design with three replications were used and three treatments of agribor fertilizer 0.18 kg da -1 B (1 kg da -1 agribor); 0.27 kg da -1 B (1.5 kg da -1 agribor); 0.36 kg da -1 B (2 kg da -1 agribor) and control (no fertilizer) were applied. The effects of applied doses on yield properties were studied. From yield properties for sugar beet tuber weight, green leaf weight, and proportion of polar sugar in tuber were investigated. Results showed that green leaf and proportion of polar sugar in tuber not statistically important but the first application (0.18 kg da -1 agribor fertilizer) gave an statistically important yield increase in sugar beet. Boron contents of soils and boron uptake of plant species should be considered at boron application.

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