EJPAU, 2017, Volume 20, Issue 4

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20(4) #01
12 Oct 2017
Agricultural Engineering
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Experiments were carried out to evaluate synthetic fertilizers effects on seed germination and seedling growth of barley (Hordeum vulgare L.). In this study, three most commonly used synthetic fertilizers including Urea (100, 200, 300, 400, 500 and 1000 ppm), Triple superphosphate (10, 20, 30 and 60 ppm) and K2SO4 (100, 200, 300, 400 and 800 ppm) were used in four replications. The results showed that fertilizers at given concentrations did not change seed germination performance. However, there was a significant influence on seedling performance. Seedling growth under Triple superphosphate and K2SO4 applications was slightly enhanced, but the enhancement for Urea was notice only at low concentrations. At high concentrations the seedling growth significantly decreased in comparison with control. The root to shoot ratio was influenced by Urea and when the concentrations exceeded 300 ppm the ratio was decreased. The results also showed that Triple superphosphate improved root dry weight, but the other treatments decreased this trait slightly. It was concluded that the seedling growth of barley was more sensitive than seed germination to the fertilizers, and among the treatments Urea application due to inhibition effects at high concentrations must be used carefully.

20(4) #02
16 Oct 2017
Wood Technology
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Electrical and dielectric wood properties are used in many applications. In this work, the complex impedance of seven wood species was measured for frequency range 1 kHz–1 MHz. The measurements were conducted with parallel and perpendicular orientation of the electrical field with respect to specimen visible grain cut from sapwood and heartwood. Based on the complex impedance, values of relative permittivity and loss coefficient were calculated. These parameters of various wood types differs significantly below 10 kHz for relative permittivity and below 200 kHz for loss coefficient. For wood samples classification, the relative permittivity values measured at frequency 5.1 kHz and the loss coefficient values measured at frequency 110 kHz were used in this work. Three different classification methods were employed for clustering. Results show that relative permittivity looks more promising parameter for wood species differentiation.

20(4) #03
03 Nov 2017
Economics
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This article is about analysis of the dependence of industrial and agricultural production in the regions of Azerbaijan on two main factors: capital funds and workforce. It was mainly used the Cobb-Douglas production function and linear function in this analysis. The Cobb-Douglas production and linear functions that have economical and statistical meaning are used during analysis. In the analysis, it is decided not to take account of the main funds that indirectly used in the production and to improve the statistical database because the main funds that indirectly used in the production and the lack of statistical database create some hardships for making exact decisions and calculation.

20(4) #04
21 Nov 2017
Agronomy
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Limited supplies of freshwater are of concern worldwide. The ever growing demand for water for agricultural purposes warrants the need for alternative water sources for irrigational purposes. Soap-based grey water was used to irrigate fluted pumpkin plants (Telfairia occidentalis) at different frequencies of wetting for a period of 3 months; this was coupled with the concomitant effects of shading conditions. The results obtained showed that grey water had favourable effects on the growth and yield of Telfairia occidentalis, having little or no effect on the proximate content. With regard to yield, determined herein as number of leaflets, since the plant is majorly utilized for its leafy vegetable, was better under partial shade; no significant differences were recorded for leaf area under various shading conditions. Increased superoxide dismutase and catalase activities in higher plants, as reported in this study, is an indication of disturbed physiological stress condition, triggered by biotic stress condition. Thus grey water can serve as alternative source of irrigation while augmenting with fresh water.


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