Studies on the Efficient Utilization of Agricultural Machinery (1)

Relation between the Working Rate and Working Methods in Grain Harvesters of Row Crops

Abstract

1. The authors classifild the operating methods of rowcrop grain harvesters into I-IV types as in Fig. 1. To study the relation between the field size (W′, L′) and the machine operating rate (C), the general equation of each operating method was determined by working locus.
2. When the types II and III were combined, the general equation was determined to define the optimum width (W″_best) to change from II to III type. Also the general equation for the work rate (C₂₃) was introduced.
3. The standard values of work elements for row crops grain harvesters (two row riding type combine, walking type thresher, walking type binder) as shown Table 2 and 3 were obtained from the investigation using them. These values were put into the general equation. The combined equation of type II and III was able to apply to rotary plowing.
4. We studied on the reaping area by hand of the headland. The total working rate of machine (C_M) was estimated from the sum of working rate of machine (C) and threshing time of headland. All working rates (C_T) were calculated from the sum of (C_M) and hand reaping time of head land. The values of (C), (C_M) and (C_T) for each working method and the size of field were obtained concerning two row riding type combines.
5. The optimum operating method for a field size was confirmed concerning two row riding typ combines.