<![CDATA[AbstractThe purpose of this study was to evaluate the design concept and performance of the ditcher that has been designed for soybean cultivation on saturated soil culture. The design concept evaluation was done by experiment on 3 types of prototype ditcher to determine one of the best ditcher design concept. It was selected by a technique weighted performance method. The performance test on the best ditcher prototype was carried out in a field with silty loam soil at average moisture content 65.4% (dry basis) and 470 kPa average cone index. The last crop in the field was rice. The plastic limit and plasticity index of the soil were 34.05% and 19.80% respectively. Depths of operation considered were 20 cm. Tests were conducted at average forward speeds of 0.51 m/s resulting 28.7% average wheel slip. Theoretical field capacity was 0.74 ha/h. The average width and depth of the ditch that was formed were 32.6 cm and 18.3 cm respectively. The soil disturbance created as a result was also reported.AbstrakTujuan penelitian ini adalah mengevaluasi konsep desain dan kinerja ditcher untuk pembuatan parit pada budidaya kedelai jenuh air. Evaluasi konsep desain dilakukan dengan percobaaan pada 3 jenis prototipe ditcher untuk menentukan satu konsep desain ditcher terbaik. Desain terbaik dipilih dengan metode indeks kinerja berbobot. Uji kinerja prototipe ditcher terbaik dilakukan di lahan sawah bekas panen padi dengankelas tekstur tanah liat berdebu, kadar air rata-rata 65.4% (basis kering) dan tahanan penetrasi rata-rata 470 kPa. Batas plastis dan indeks plastisitas tanah masing-masing adalah 34.05% and 19.80%. Kedalaman operasi dipertahankan pada 20 cm. Slip roda traksi rata-rata yang terjadi 28.7% dengan kecepatan maju rata-rata 0.51 m/s. Kapasitas lapangan teoritis diperoleh 0.74 ha/jam. Lebar dan kedalaman parit yangterbentuk adalah 32.6 cm dan 18.3 cm. Parameter tanah terusik sebagai pengaruh operasi ditcher juga dilaporkan di dalam hasil penelitian ini.]]>
Copyrights © 2018
