Proses yang ingin dihindari ketika akan mengoperasikan traktor tangan adalah pada saat melakukan starting menggunakan engkol tangan untuk menghidupkan mesinnya karena dianggap melelahkan bagi operator, apalagi ketika tidak langsung berhasil dan harus diluang berkali-kali. Penelitian analisis input energi minimal untuk menghidupkan mesin traktor tangan bertujuan membantu menganalisis besaran nilai energi yang dibutuhkan pada setiap kali proses starting melalui penggunaan rumus energi kinetik (EK) pada komponen roda gila (flywheel). Hasil analisis nilai input energi minimal untuk menghidupkan mesin traktor tangan dengan mesin diesel yang memiliki daya maksimal   8,5 hp diperoleh sebesar 353,82 joule (≈ 0,098 watt-jam). Nilai tersebut diperoleh berdasarkan dari nilai kecepatan putar dan berat/massa pada komponen roda gila (flywheel) melalui pengukuran lapangan. Nilai kecepatan putar roda gila (flywheel) yang digunakan adalah nilai yang paling rendah (nmin) dari beberapa percobaan, yaitu sebesar 359,61 rpm yang diukur menggunakan tachometer, sedangkan berat/massa roda gila (flywheel) yang digunakan sebesar 30 kg.

Fresh cut flower has characteristis such as perishable and short shelf life. Pulse treatment is akind of method that can prolong fresh cut flower’s shelf life. Pulse treatment is a postharvesthandling which is done by soaking the stem of flower into a solution containing nutrients(glucose and sucrose) and germicides. The objectives of this reseacrh were to determine the bestalternatives of pulse treatment and determine shelf life of fresh cut rose flower of eachtreatment. There were 6 alternatives, namely P 1 (5% sucrose+20 mg/l AgNO 3 ), P 2 (150 mg/lAgNO 3 ), P 3 (1,2% sucrose+0,2 mM STS), P 4 (5% sucrose+20 mg/l AgNO 3 +320 mg/l citricacid), P 5 (1,2% sucrose+ 0,2 mM STS+ warm water (40 0 C)), P 6 (5% sucrose+20 mg/lAgNO 3 +320 mg/l citric acid+warm water (40 0 C)). The parameters used for determining shelflife are color of petals (lightness and redness), moisture content, and texture of stem. As results,shelf life of P1 was 8 days, P2 was 6 days, P3 was 4 days, P4 was 6 days, P5 was 5 days, andP6 was 5 days. All of the alternatives gave longer shelf life than control (4 days). The bestalternatives was P1 with 8 days shelf life. Moisture content in that day was 78,313%, texture ofstem was 47,0603 N, lightness was 31,237 and redness was 46,942.