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The impact of different combine harvester regulations during the mechanical harvesting of forat rice variety | ||
| Kufa Journal for Agricultural Science | ||
| Article 1, Volume 7, Issue 3, 2015, Pages 186-204 | ||
| Author | ||
| Kamal Muhsin Ali Al-Qazzaz | ||
| Abstract | ||
| The research was conducted at the Mishkhab research station to study the impact of different combine harvester regulations on the rice losses inflected by harvester units and the total losses for the Class Dominater harvester .The forat variety which was verified by the ministry of agriculture was used in this experiment .However , the research consist of three factors with three levels for each factor , these are : combine field speed are 1.7, 2.3 and 3.0 km/hr, threshing cylinder speed are 800,1000and 1200 r.p.m , cylinder concave clearance are 1.25, 1.5 and 2 cm , the research performed as a factorial experiment at the RCBD design with three replications. The forat rice crop variety showed a clear response to change combine harvester regulations. These regulations are combining harvester field speed, threshing cylinder concave clearance which were counted as the three main factors of this research. The results observed showed that the losses of the each combine harvester unit and the total losses were changed significantly as the combine harvester field speed changed. The highest total losses ratio of combine harvester was 7.24% at the highest field speed (3.0km/hr). However this ratio decreased at the other two combine harvester field speeds and the reason was the combine reel index which was at its optimal condition. This reel condition coincided the combine field speed with the reel speed and the result was a reduction in the combine platform losses and this result reflected on the combine total losses .This phenomenon was observed particularly with this variety because it is easily shattered. The results also showed that the effect of increasing the threshing cylinder speed or reducing the cylinder concave clearance within the range of this research was identical interim of the results achieved .However, it was observed that no significant effect of changing these factors on the combine platform losses, while a significant in losses was noticed in the threshing and separation units. It was also noticed that no significant effect either the threshing cylinder speed or cylinder concave clearance on the ratio of the total losses. The results of the interactions showed that the lowest percentage of the total losses for harvesting of forat varies was 4.72 % at 1.7 km/hr combine field speed 800 r.p.m threshing cylinder speed and 2.0 cm cylinder concave clearance while the highest total losses was 8.3 % at the highest combine field speed 3 km/hr, 1000 r.p.m threshing cylinder speed and 1.25 cm cylinder concave clearance. | ||
| Keywords | ||
| harvesting; losses; mechanical adjustment | ||
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