The loss of soil particles due to erosion is one the main problems current agriculture. However, tillage may also contribute undesirable transport particles. It note that effects particular working elements used on implements for have not been described in a sufficient way. To determine translocation particles, measurements were done Central Bohemian region. Two basic machines measureme...

The authors have developed a row-crop cultivator equipped with ridge former, which allows performing high-quality operations of row crop cultivation in one pass. inter is carried out cultivator, on each section two formers are mounted so that their flat discs directed towards the plants at an acute angle, and extreme edges wings V-shaped sweeps located lower base soil ridge. When moves, loosen ...

Tillage is the base operation in agriculture and its energy represents a considerable portion of the energy utilized in crop production. To measure the implement force requirements, are used dynamometers that are pull or three-point hitch types. In this research, an 82 kW research tractor equipped with an instrumentation system was used to determine the draft force inputs for four common tillag...

SURGICAL TREATMENT OF ELEPHANTIASIS SCROTI COMPLICATED WITH REDUCIBLE SCROTAL HERNIA, 1st BY PERFORMING A MODIFICATION OF WOOD'S OPERATION ON THE HERNIA; AND 2ndlt, BY EXCISION OF THE DISEASED SCROTUM. Case I.? Aheer, u Mahoinedan cultivator, aged 40 years, who Lad long been in bad health, was admitted into Mr. Cntcliffe's ward on the 28th November, 1871, with elephantiasis of the scrotum of tw...

METHODS: Plots measuring 9 ft X 17.5 feet (2.5 X 5 m), consisting of 4 rows with 3 ft (0.9 m) row spacing, were located on the Southern Agricultural Research Center (SARC) at Huntley, MT. The trial was planted 28 May, using third generation, PVX certified seed potatoes, cv. “Russet Norkotah”, machine-cut into 2 to 2.3 oz seed pieces, with all seed pieces being placed into furrows by hand, and c...

AIM The aim of this study was to measure the increase in root canal surface area and canal transportation after biomechanical preparation at 1, 3, and 5 mm short of the apex with three different rotary systems in both continuous rotary and reciprocating rotary motions. MATERIALS AND METHODS Sixty freshly extracted human mandibular molars with mesial root canal curvatures between 20° and 30° w...

It is generally believed that stable airflow can effectively reduce tip burn, a common lettuce plant disease in closed factories severely restricts the sustainable development of these factories. This study aims to achieve cultivator by zoning seedling and growth stage crops installing differential fans, while ensuring comprehensive quality. In this study, three-dimensional simulation factory m...

A polygon A in a configuration C is called rotary if C admits an automorphism which acts upon A as a one-step rotation. We study rotary polygons and their orbits under the group of automorphisms (and antimorphisms) of C. We determine the number of such orbits for several symmetry types of rotary polygons in the case when C is flag-transitive. As an example, we provide tables of flag-transitive ...