Over time, different ways have been used to increase vegetable production per unit area; from the crop systems used (field crops, protected crops and forced crops), to intensive land use (successive, associated, double and intercropping) and to the technologies applied to them. In this paper we aimed to observe some aspects related to the behavior of tomatoes grafted on potatoes.The biological material was represented by: 'Sweet Million F1' cherry tomato hybrid variety, "Carrera" white potatoes, "Memphis" red potatoes, "Blue Star" hybrid purple potatoes. The experimental variants were: tomato control variant, potatoes control variants and tomato variant grafted on red, white and purple potatoes. It was observed that the best grafting was the tomato version grafted on the red potato. The control potato variants had the highest production compared to the grafted ones.The control tomato variant registered the highest number of flowers and formed the most fruits.The three grafted variants had a lower degree of fruit binding compared to the control variant.
The performance of PEM fuel cells is influenced by several factors such as: the operating temperature of the cell, the reactant gas flow, work pressures, the reaction gas humidity. In the present work we aimed to identify the optimal values of these parameters for operation of a PEM cell to achieve maximum power in conditions of high efficiency; the technological possibilities of its use in a portable energy application have been evaluated. Experimental measurements regarding the integrating polymeric membrane in three different fuel cell construction designed were performed. The influence of the mechanical compression of the GDL diffusion layer on the total internal resistance of the cell was achieved by comparative analysis of the polarization curves. It was found that as the deformation level of the MEA increases, the power generated by the battery increases progressively. The resulting experimental data subsequently allowed the design and implementation of a PEM fuel cell assembly, fully functional at power level, corresponding to the number of constituent elements.
Biodegradable nutrient media based on cellulose fibers and peat with added protective materials and stimulating represent the higher form of transplant used in current technologies for producing plant seedlings. Worldwide intensive development of the pots production industry (the effect of increasing demands from agriculture and their quality level in terms of degradability and operational sustainability, with outstanding results in reducing stress factors) led to fast expansion of their use with a high economic efficiency. Determination of potential and effective degradation was achieved by the method for determining cellulolytic activity in soil. Biodegradation potential recorded differences during the course of experience in the sense that it increases as the pots exposure time to treatment is higher. In conclusion, the pots treatment (planted/without plant) has a great influence on the effective biodegradation.
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