El Catálogo Colectivo reúne los registros del material que posee cada una de las
bibliotecas de la Universidad Nacional de Córdoba, pudiendo encontrarse colecciones
especializadas y actualizadas en todas las áreas del conocimiento; lo que permite una
amplia visibilidad y garantiza el acceso al patrimonio documental de la Universidad.
Se encuentra disponible para toda la comunidad académica: estudiantes, docentes,
egresados e investigadores.
Si formas parte de la comunidad de la UNC también podés solicitar préstamos de material,
a cualquier biblioteca universitaria, utilizando el servicio de préstamo interbibliotecario,
independientemente de la facultad a la que pertenezcas, la carrera que curses o la cátedra
que dictes.
Evaluation of different construction materials in the shield sunflower harvester head (Helianthus annuus L.) for the reduction of capitulum shelling
In the harvest, the highest percentage of grain losses occurs in the harvester head. This exceeds 70 % of the total loss in the cultivation of sunflower (Helianthus annuus L.). The objectives of this work were to test the different manufacturing materials of the shield of the sunflower head at diffe...
In the harvest, the highest percentage of grain losses occurs in the harvester head. This exceeds 70 % of the total loss in the cultivation of sunflower (Helianthus annuus L.). The objectives of this work were to test the different manufacturing materials of the shield of the sunflower head at different speeds to reduce losses due to impact and to propose different recommended speeds for each material. The test was carried out on confectionery sunflower (Hybrid NTC 90). A Mainero brand head was used. It was tested at two different forward speeds (6.5 km/h and 8 km/h) with three shields made of different materials: a 2 mm thick sheet metal shield, a shield covered with elastomer, and a shield made of fiberglass. The parameter evaluated was the loss of grains in the harvester head. The results obtained show that the fiberglass shield presented the lowest percentage of grain losses and that at 8 km/h grain losses exceeded those recommended regardless of the shield used. It is concluded that the use of more elastic materials reduces grain loss due to impact.
