This paper presents results regarding the variation of the qualitative parameters of the organic fertilizer machines according to the parameters of the material and control, of the working regime. These results are obtained from mathematical models that interpolate experimental data. The functions thus obtained allow the investigation of the existence of optimal working regimes and, if confirmed, the identification of these operating modes (of the optimal control parameter set: rotational speed, inclination angles, flow rate, etc.). The analysis can be extended to other types of agricultural machinery for the administration of solid organic fertilizers, chemicals or amendments.
Harvesting, preparation and conservation of hay is a frequent method for harvesting fodder from grasslands and forage crops, especially from the hill and mountain areas. The greatest losses of nutrients are obtained by traditional drying on the stubble of the hay. These losses are in the case of unfavourable weather even at 50 ... 60%, the drying time increasing to over 6 ... 8 days. This paper presents the results of the experimental researches achieved within a new technology for shortening the time from harvesting the clover to obtaining the hay at storage humidity. A pilot ventilation installation with a monitoring and control system for working processes was used to carry out the research. During the experiments, the parameters of the aeration agent were measured: temperature and humidity, as well as clover mass characteristics: humidity, temperature, drying uniformity.
In the last period, a sector that has seen an important development in fruit growing is the one dedicated to sea buckthorn crops, respectively the technologies for the valorisation of fruits and food by-products deriving from the technological processes dedicated to these fruits with high human and animal nutritional value. In this paper, the aim is to present the results obtained by implementing innovative technologies for the integrated management of works in agricultural farms, vineyards and orchards, particularly intended for the cultivation of sea buckthorn, through which were tracked the technological parameters achieved by an equipment for the separation of sea buckthorn seeds from the pulp of the fruit, respectively the distribution of the separation fractions from the raw material depending on the working regime (the rotation frequencies of the functional systems) and the sizes of the holes of the separation sieve as well as the energy indices of the equipment. From the analysis of the obtained results, it was concluded that, in order to increase the performance of the experimental equipment, the site sections must include a wider range of hole sizes, it should be equipped with a brush system for their cleaning and improve the box system for collecting the material separated on fractions in order to reduce losses.
Abstract. Conservation of fodder plants harvested from meadows and hay fields, in order to provide hay feed for animals, is an important objective for livestock farmers. The rational feeding of animals, especially during the cold season, when they cannot feed, is the determinant factor that highlights their biological potential to produce various, high, constant, year-round and good quality productions. That is why animal husbandry, the health of animals and their productive capacity depend to the greatest extent on the supply of feed / fodder rich in different chemical constituents throughout the year. Harvesting, preparation and conservation of hay is a frequent method for harvesting fodder from grasslands and forage crops, especially from the hill and mountain areas. The greatest losses of nutrients are obtained by traditional drying on the stubble of the hay. These losses are in the case of unfavourable weather (by hay molding) even at 50-60 %, the drying time increasing to over 6-8 days. This paper presents the results of the experimental researches achieved within a new technology for shortening the time from harvesting the fodder plants to obtaining the hay at storage humidity. A pilot ventilation installation with a monitoring and control system for working processes was used to carry out the research. During the experiments, the parameters of the aeration agent were measured: temperature and humidity, as well as fodder mass characteristics: humidity, temperature, drying uniformity. Experiments were conducted in two time periods with different characteristics. The results obtained for two plant varieties were analysed comparatively and the influence of the environmental parameters on the duration of the aeration process has been highlighted.Keywords: aeration, fodder plants, technology, animals. IntroductionWithin the new concept of sustainable development in animal husbandry, animals in general and ruminants in particular have a special future due to the fact that judicious organization can produce nutritionally balanced and qualitative feed for all species and categories of farm animals.Under climatic conditions in Romania, the vegetation period lasts for 5-7 months, depending on the altitude. For the rest of the time, animals are given preserved fodder. Besides fodder that is kept as such (feed beet) there are two preservation systems, namely by drying (hay) and by milling (silo) [1; 2].Internationally it distinguishes research, production and providing of a wide range of preparations and additions that compete for the best preserved fodder.Bovine diet has a specific architecture based on the production of high quality feed and in sufficient quantities to provide balanced rations that will meet the daily requirements of the animal [3].The feed used in cattle feed can be divided into the following groups: fibrous fodders (hay, coco, straw, etc.); concentrated fodders (cereals, cakes, residues from the milling industry); juicy fodders (silos, roots, chickpeas and bobs); feed additives (premixes) [3].The...
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