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Modern robots perform a number of comprehensive tasks. In the agricultural sector, they are able to work on large areas with a wide range of crops with different agronomic requirements. They are highly maneuverable, some of them have the ability to rotate around its axis (can work in hard to reach places and small terrains). In the beginning, agricultural robots were slow, light and small. At the same time, they could not fully meet the requirements of their „employers“ due to the comprehensiveness of agricultural activity and the level of development of scientific and technological progress. The tasks of the agrorobots will only increase - from data collection, weeding, performing various agrotechnical activities to offering many functions. The present article uses the famous TRIZ theory, developed by the Soviet inventor Henrik Altshuler. Its basic principle is the resolution of an unresolved contradiction by means of an inventive solution, if any. An unresolved inconsistency occurs if, when one parameter improvement is introduced into a system, another parameter deteriorates. These contradictions are called „technical contradictions“. The overall dimensions of an agricultural robot for growing some crops have been determined. [ABSTRACT FROM AUTHOR]

The present study aims at evaluating the influence of Reni preparations content on essential amino acids in aboveground biomass from the alfalfa varieties Multifolium 1 and Legend using correlation analysis. Three -year data from field experience conducted in the experimental field of the Agricultural University - Plovdiv in the period 2017-2019 were used. As a result of the analysis, correlations were found between the studied indicators in both varieties For Multifolium 1 the strongest positive correlation was reported between the amino acids valine and isoleucine (r = 0.981), threonine and phenylalanine (r = 0.980); and for Legend variety - between the indicators isoleucine and leucine (r = 0.995), lysine and threonine r = 0.966). The correlations between the accumulation of methionine and other amino acids were mathematically unproven. [ABSTRACT FROM AUTHOR]

During 2012-2014, the sugar, protein and cellulose content in the grain of six of the most popular sweet corn hybrids in Bulgaria was fixed as part of creating Sweet Corn Producing Technology at the Agricultural University. Challanger (F1) and GSS keep their sugar content longest, which makes them most suitable for fresh storing. The content of cellulose and protein in the cobs of all tested hybrids was relatively low - less than 6%, which makes them extremely suitable for human food. Protein is at least about 4%, values comparatively low even for cereals, but they are registered in the milky maturity of the crop and considering the high sugar content in the grain the crop is characterized as dietary and healthy food. [ABSTRACT FROM AUTHOR]

Sweet corn is infested by different pests which are almost constantly present in the planted fields and pest outbreak could cause serious losses. In this regard, identification of the species composition of pests and the critical moment of their control are quite important in growing the crop. Studies for identifying the species composition of pests in sweet corn fields were carried out in the period 2011-2013 on the training and experimental site of the Agricultural University - Plovdiv. Standard entomological methods were used: route observations, visual observations on labelled plants arranged in a checkerboard pattern over the entire planted area, etc. As a result of the performed studies, the species composition of harmful entomofauna was identified and its development during vegetation was followed. Immediately after sowing until the stage of 3-6th leaf soilborne pests of the following families were identified: Elateridae, Tenebrionidae, Melolonthidae and Noctuidae, as well as corn weevil (Tanymecus dilaticollis Gyll.) There were damages on the leaves caused by adult forms of the cereal leaf beetle (Oulema melanopa L.). Larvae of the cotton bollworm (Helicoverpa armigera Hb.) and the European corn borer (Ostrinia nubilalis Hb.) were isolated at the stage of tassel and silk development. Referring to omnivorous pests, single damages caused by locusts and crickets were established. The most serious damages in the sweet corn fields were caused by pests attacking the generative plant parts - the cotton bollworm and European corn borer. [ABSTRACT FROM AUTHOR]