The purpose of this study was to analyze the nutrient content of POC produced from household waste using the stacked bucket method. This research was conducted for 3 months from September to November 2020. This research is a descriptive study. The first process is the process of making organic fertilizer from household waste which is fermented in a stacked bucket for 2 months. Leachate from organic waste is dried in the sun for one month or until the leachate is blackish in color and has no more subtle aroma. The finished POC is sampled and tested in the laboratory to determine the content of micro and macro nutrients as well as organic C. To measure the content of macro and micro nutrients, the test material used was Kjeldahl for nitrogen content while P, K, Fe, Mn, Cu, Zn, S, Ca, Mg, Na used spectrometric wet oxidation method and the content of C-organic by spectrophotometric method. The test results showed that the POC of household waste contained 0.08% total N, 0.07% total P, 0.28% total K, 5 ppm total Fe, 0.4 ppm total Mn, 0.0 ppm total Cu, Zn total 0.6 ppm, total S 0.5%, total Ca 165.0 ppm, total Mg 106.9 ppm, total Na 172.7 ppm, organic C 1.06%, and C/N ratio 13.27.

The aim to this study was to determine the effect of plastic silver mulch and rice straw mulch on soil moisture conservation of green bean so that the plant can grow in dry season with enough water. The method used in this study was a randomized block design with three treatments: no mulch (T0), plastic silver mulch (T1) and rice straw mulch (T2). The parameters observed were physical soil of initial and final research, soil moisture measurements every 3 days, as well as growth and crop production parameters including plant height, number of seeds in pods, 100 seeds weight, sample plant production and total production. The results showed that the physical of soil analyzed were clay textured soil, preliminary porosity 60.77 and at the end of the study increased to 77.50%, organic matter 1.52%, initial bulk density 1.04 g/cm3 at the end of the study decreased to 0.60 g/cm3, soil permeability of 7.77 cm / hour and available water is 13.95%. The use of rice straw mulch from the beginning to the end of the study showed the best water content while the use of plastic silver mulch and no mulch showed water content not much different. The use of palstic silver mulch gives the highest yield of the best crops on 14 HST measurements where the plastic silver mulch differs markedly by the rice straw mulch and no mulch. The yield of green beans produced in the treatment of plastic silver mulch using the best results with a total production of 2.00 tons/ha, this result is significantly different from no mulch but not significantly different of rice straw mulch. Rice straw mulch is better used for soil conservation because it can improve soil aeration, retain water, prevent soil erosion, and increase organic matter on the soil.

The purpose of this research is to produce a sago starch sieving machine with an electric motor drive. This study used an experimental method by making and testing a sago starch sieving tool. The starch material used is Dwitrap sago starch. The calculations carried out are the calculation of the pulley speed and the capacity of the tool, while the sieving test was carried out by sifting 5 kg of sago starch which was repeated 3 times. The size of the sieve used is 100 mesh, from the sifting results will be obtained sago starch that passes and does not pass the sieve. In addition, the water content of sago starch was calculated before sieving. The results showed that the sago starch sieving machine with electric motor drive had specifications: length 114 cm, width 74 cm, overall height 90 cm. This tool consists of 4 main components, namely, the frame, the output, the sifter, and the electric motor. The resulting pulley speed is n1 1,400 rpm, n2 600 rpm while n3 150 rpm. The working capacity of the machine is 76.75kg/hour. with an average of 4.03 kg of sago starch that passed the sieve and 0.96 kg of which did not pass. The water content test on Dwitrap sago starch showed that the water content was still high, namely 16.23%. The high water content in sago starch will greatly affect the sieve results.

The purpose of the study was to determine the quality of the grainand rice are planted, the ricevarieties Inpago Unsoed 1. The research method use dis data collection, namely primary data andsecondary data. Primary data is used for observed in this research about grain moisturecontent,density of grain, foreign bodies, empty grains, grain crackedor broken, after the percentage ofgrain milled head of rice, broken rice, graing roats, grain limestone, yolk broken and milled rice yield.The results showed that during the observation the quality of grain varieties Inpago Unsoed 1 hasmilled at about 13,33% moisture content, grain density of 0,57g/ml, and grain weight is 27,60g/1000grain. The percentage point for the determination quality of head point is 73,49%, broken grainsabout 13,92%, and 12,34% graing roats. The quality of rice milled varieties inpago Unsoed 1 includelow. The lower of rice quality is due to the low of head rice percentage, while the percentage ofbroken grain sand high graing roats. Rice milled yield about 51,23%

The purpose of this study was to produce a fish smoking device for hot smoking and cold smoking methods. This study used 3 types of fish, namely paha fish (Leptobrama sp.), stingray (Dasyatis sp.), and tilapia fish (Oreochromis mossambicus), and the fuel used as fuel for smoking is coconut shell. The data measured included smoking room temperature data, fish weight before and after smoking. The data obtained were analyzed descriptively. The results showed that smoking fish using hot smoking and cold smoking methods with specifications, length 50 cm, width 50 cm, overall height 83 cm. This tool consists of three main components, namely, a fumigation chamber which is combined with a hot smoking biomass combustion chamber, a cold smoking biomass combustion chamber and a connecting pipe. The performance test of the tool was carried out by calculating the weight loss of fish during hot smoking and cold smoking. The smoking time used for hot smoking is 2 hours (temperature 50 – 75℃) and cold smoking 4 hours (30 – 45 ℃). The results showed that the highest percentage of weight loss during hot smoking occurred in stingrays on the second shelf, which was 29.25%, while the highest percentage of weight loss during cold smoking occurred in stingrays on the first shelf, which was 23.79%. The weight loss of fish in both hot and cold smoking is strongly influenced by the smoking time, the distance between the smoking rack and the heat source and the type of fish. Keywords : cold, heat, shrinkage, smoking, weight