Influence of peripheral speed on grain spacing in popcorn maize sowing

U radu je provedeno ispitivanje ostvarenih razmaka pomoću aritmetičke sredine i drugih statističkih parametara kojima se željelo utvrditi koja je sjetvena ploča najpogodnija za sjetvu kukuruza kokičara pri brzini rada sijačice od 6 km/h. U simulaciji je korištena pneumatska sijačica PSK4 i Hibrid OSSK504 PC koji ima srednje krupno zrno. Upotrebom različitih sjetvenih ploča u sva četiri mjerenja ostvarena su odstupanja u prosječnim razmacima koja su viša od teoretskog razmaka. Najbliži prosječni razmak teoretskom utvrđen je kod upotrebe sjetvene ploče n=18 otvora i iznosio je 23,14 cm, odnosno 4,84 % više od očekivanog. Sjetva kukuruza kokičara se ne razlikuje puno od sjetve standardnog kukuruza, ali treba obratiti pozornost na adekvatnu pripremu i podešavanje sijačice. Datum sjetve, sorta i vremenski uvjeti su preduvjet za dobar urod, kao i dobro pripremljen sjetveni sloj.In the paper, the test of the achieved distances was carried out using the arithmetic mean and other statistical parameters, with the aim of determining which sowing plate is the most suitable for sowing popcorn corn at the seeder's operating speed of 6 km/h. The PSK4 pneumatic seed drill and the OSSK504 PC hybrid, which has medium-coarse grain, were used in the simulation. By using different seeding plates in all four measurements, deviations in the average distances were realized, which are higher than the theoretical distance. The closest average distance to the theoretical one was determined when using a sowing plate with n=18 openings and was 23,14 cm, apropos 4.84 % more than expected. Sowing popcorn corn does not differ much from sowing standard corn, but attention should be paid to adequate preparation and adjustment of the seeder. Sowing date, variety and weather conditions are prerequisites for a good harvest, as well as a well-prepared seed layer