Indices of flow fruit detacher with angular vibrations at inertial threshing of sesame

An experimental stand of flow rotational fruit detacher with asymmetric angular vibrations has been developed at the Agricultural University - Plovdiv (Bulgaria).   It is designed to detach fruits and seeds from the plants via inertial way. The aim of the presented paper was to evaluate the main indices of the flow fruit detacher at inertial threshing of non-dehiscent sesame varieties.  The results indicated that the detacher threshes over 95% of seeds without reducing their germination.   The seed moisture content is from 12.2% to 13.3%, which is two times higher than recommended for harvesting sesame with grain harvester.   The portion of the impurities in the threshed mixture is from 20.99% to 38.41% depending on varieties.   The detacher has reached 225 times higher threshing productivity than single person, but it is 1.4 times lower than the thresher of the grain harvester

Tačnost vođenja poljoprivredne navigacije sa RTK korekcijom u prolećnoj setvi

They are carried out two comparative experiments for determining the real guiding accuracy of a seed drill during spring sowing an earth-up crop. At the first one the seed drill is running with circle turns. The juxtaposition is made for the guiding accuracy by conventional disk markers and by agricultural navigation with RTK correction. At the second experiment the seed drill is running with stretch turns. The guiding accuracy of both navigation without RTK and RTK navigation are compared. The agricultural navigation with RTK ensures better statistical estimations, better qualitative indices for the boundary row distance and higher operational indices of the tractor with a seed-drill during sowing of the earth-up crop.Sprovedena su dva komparativna ogleda za određivanje stvarne tačnosti vođenja sejalice tokom prolećne setve. Sejalica se u prvom ogledu kretala sa kružnim okretima. Tačnost navođenja pri slaganju prohoda je određivana korišćenjem konvencionalnih diskosnih markera i poljoporivrednom navigacijom sa RTK korekcijom. U drugom ogledu sejalica se kretala sa produženim okretima. Poređena je tačnost navođenja kod obe navigacije, sa i bez RTK. Poljoprivredna navigacija sa RTK obezbeđuje bolje statističke procene, bolje kvalitativne pokazatelje za ivični prohod i više operativne pokazatelje agregata traktora sa sejalicom tokom setve