USE OF AN INNOVATIVE METHOD FOR STRUCTURAL ANALYSIS OF THE DISTRIBUTION DEVICE USED IN PNEUMATIC MACHINES FOR WEEDING PLANT SOWING

The topic addressed is a computer-aided design (CAD) method combined with computer-aided engineering (CAE) used in the analysis of choosing the optimal constructive variant of the distribution device used in pneumatic machines for weeding plant sowing. The CAD configurations, realized by the 3D parametric modeling using the SolidWorks program, were subjected to structural analysis (von Mises equivalent stress distribution, relative displacement field distribution and safety factor). Based on the resulting data, the mass/resistance coefficient for the 3 analyzed configurations were determined. The comparison of these indicators led to the choice of the optimal constructive variant, namely the most efficient one

CONSIDERATIONS ON EQUIPMENT USED FOR MORE EFFICIENT USE OF WATER IN PRECIPITATION

Soil is the element that underlies the development of agricultural activities but also of other human activities.It is the source of water supply and nutrients necessary for the growth and development of crops. the entire period of vegetation. The present work presents some of the most used equipment used in the technologies of crops of fodder plants and of grain crops. located on muddy or sloping grounds for the most efficient use of rainwater, preventing erosion and leakage. [8

RESEARCHES ON THE DEVELOPMENT OF AN EXPERIMENTAL MODEL OF WET SATURATED STEAM DISTILLATION EQUIPMENT

Distillation is a conventional method of extracting volatile oils from medicinal and aromatic plants. This is defined as a process of separating the components of a mixture that is based on the difference between the vaporization temperatures of the constituents, respectively water and oil when distilling medicinal plants. Distillation can be performed in three ways: distillation with water, by boiling the mixture of plants and water, condensation of resulting vapours and separation of oil, distillation with water and steam, in which the steam obtained by evaporating a quantity of water passes through the plant batch; steam distillation under pressure provided by an external generator, a process named in the literature and steam entrainment. The steam distillation process is applicable to many medicinal and aromatic plants that grow in our country. The extraction of volatile oils through this process depends on the different characteristics of the plants but also on the main parameters of the process, pressure and temperature, which are different

ASPECTS ON THE CONSTRUCTION AND OPERATION OF SPRAYING EQUIPMENT FOR REDUCING DRIFT IN FIELD CROPS

The paper presents innovative solutions on the construction si operation of spraying machines in the view of reducing drift in field crops: with innovative electrostatic spraying system, with special panels with static condenser, nozzle protection system, spraying devices provided with hoods, downward air curtain system and with shielded system with caps for controlling drop dispersion. The paper is important, on the one hand, for producers of spraying equipment for reducing drift and, on the other hand, for farmers in the view of efficiently applying treatments in field crops, but also for reducing environmental pollution

RESEARCHES ON THE DEVELOPMENT OF AN EXPERIMENTAL MODEL OF FISH POND FOR INTENSIVE FISH FARMING IN POLYCULTURE SYSTEM

In Romania, the fisheries and aquaculture sectors face several challenges. These mainly involve increasing competitiveness for the production and processing sectors. Polyculture is the breeding of several species of fish in the same space (pond, lakes, etc.). It has advantages: better capitalization of trophic potential, diversified assortment for consumers, increased production with the same human and financial effort and disadvantages: competition between species, the need for additional labour in harvest fishing, additional warehouses for parking fish. Polyculture is recommended in lakes, ponds and some ponds for extensive, semi-intensive and sometimes intensive production

RESEARCH REGARDING THE EQUIPMENT USED IN WATER TREATMENT PROCESSES OF RECIRCULATING AQUACULTURE SYSTEMS

Modern aquaculture technologies are made with the help of recirculation systems, which require the use of innovative and high-performance solutions for the treatment of recirculated water. Aquaculture recirculation is essentially a technology for growing and developing fish or other aquatic organisms by reusing water for more intensive fish production. The technology is based on the use of mechanical and biological filters, and this ecological method can be implemented for any species cultivated in aquaculture, such as fish, shrimp, mussels, etc. The scientific paper presents a brief summary of the control and solution of the main problems faced by water recirculation systems

RESEARCH ON INDUSTRIALIZATION IN OBTAINING BIOFERTILIZERS AND BIOFUELS FROM SEAWEED

Obtaining biofertilizers and biofuels from organic products has been of great interest in recent years and is an important step in combating pests and reducing soil chemicals. Seaweed is an great agent in reduction pollution, in the textile industry, in the manufacture of pulp and paper, in distillation, in petrochemistry, metallurgy, chemistry, food, pharmaceuticals, as well as in agriculture as biofertilizers.This article presents stages of research worldwide on the potential of industrialization in obtaining biofuels and biofertilizers from seaweed.The paper highlights technologies and processing methods in obtaining future biofertilizers and biofuels with a low impact on new climate change felt strongly on agriculture

CONSIDERATIONS CONCERNING THE COMPOSTING OF ORGANIC WASTE

Compost means a product obtained by an aerobic, thermophilic, decomposition process and microbial synthesis of the organic substances in the residual products, which contains over 25% relatively stable humus predominantly composed of microbial biomass and which is subsequently subjected to a slight decomposition. stable enough not to reheat or cause problems with smell or breeding of insects and has the ratio C: N = 10-15 Regardless of its origin and nature, organic matter, depending on the conditions of aeration and humidity, evolves towards a new qualitative state, relatively stable to biodegradation, characterized by a humus-likeC:Nratio. Â

TECHNOLOGY FOR ORGANIC WEED CONTROL

In recent years, crop maintenance works have become a major challenge for organic farming systems, where the application of chemical treatments is totally forbidden. The effect of weeds on crops varies according to pedoclimatic, biological or technological parameters, the resulting damages being both quantitative and qualitative. By weed control, we aim to prevent their competition in order to obtain maximum crop yields.Among the methods of thermal weed control, used as an alternative to chemical weeding, steam or hot water-based ones have been increasingly used as they provide an efficient, environmentally friendly and economical way of removing harmful plants.This paper presents a technology for the maintenance of medicinal and aromatic plant organic crops, based on the use of innovative equipment for weed thermal control by using hot water