Jurnal Keteknikan Pertanian
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Empirical Evaluation of Kostiakov and Philip Infiltration Equation on Greyish Brown Regosol
No full textInmation is important to note because it is related to potentialsurface run-08 jlood, erosion, water storage of soil, and stream discharge especially during dry season. However, because the infiltration equation is valid for certain condition of the land measured, it is important to collect infltartion data on all types of soil manually. This research is mainly to evaluate constants of infltration equation formulated by Kostiakov (constants K and n) and Philip (constants C and D) in relation with initial soil water content. The measurements are on vegetated soil and bare soil
The Influence of Position of Durian in Determination of Ripeness of Durian Non-Destrucyively by Ultrasonic Wave
No full textThe study was conducted to assess the influence of durian \u27s position toward transmission properties of ultrasonic wave for determination of the fruit ripeness using non-destructiive technique. Three ripe and unripe durian were used to assess transmittance wave that was passed the durian. The measurement was conducted at 3 peak and valley positions and it was repeated 20 times. The result showed that position durian \u27s inJluenccad thetransmissions of ultrasonic wave. Mo mzJ a (attenuation) values can be used as indicator for durian ripeness. Ripe durian tends to have highera value than unripe durian
Cutting Torque and Blowing Effect of Slanted Blade Model for Rotary-Type Mower
No full textRotary-type mower is commonly used for cutting turfgrass as a part of landscape maintenance. Cutting torque and quality to turf surface resulted by cutting are two important factors that have to be considered in designing rotary-type mower blades. The objectives of this research are to design and build a slanted blade model, and to study its cutting torque, blowing effect, and friction between blades and turf surface on a several rotational speeds, slant angles and blade types. The blade model was tested on a specially designed turf-bin test apparatus
Desorption Equilibrium Moisture Content Isotherm of Corn
No full textThe concept of equilibrium moisture content or EMC is important in study of storage. The EMC of cereal grain is defined as the moisture content\u27 of the material after it has been exposed to a particular environment for an infinitely longperiod of time. The EMC is dependent upon the humidity and temperature conditions of the environment.The more important limitation in process design for agricultural products is the lack of exprimental data can be found. The variety of products and the differences in measurement method make limitation on the valueof the available data, especially for Indonesian\u27s products. The data are needed to get information about moisture content change when product was processed like storage or drying.The objective of this research is to determine the EMC equation models of local corn with the static method. The result indicates that Chung-Pfost and polynomial models are better reprentative to predict the EMC than Henderson\u27s
Drying Simulation of Rough-Rice in a Horizontal-Semi Cylindrical Plenum (Drying-Bed)
No full textSimulation technique was used to determine the drying charaden\u27stic of roughrice in a horizontal-semi cylindrical plenum (drying-bed). The mathematical model simulation used in study was a set of partial d&rential equation. In order to ve*the validity of the simulation technique, the experimental tests were tun to provide data to he compared with the simulation results. The experimentation was conducted using rough-rice samples at two levels of drying temperatures, 50% and45%. The results indicate that the mathematical model predicts the charactetkiics of the actual rough-rice dtying very closely that the differences are staWicaUy no significant, although there are little bit (=95%) differem between the simulatitmtechnique and the test run results. These are true not only for the drying air temperature data but also for the moisture content data as well
Reengineering of Position and Role of Institution and Policy on Land Rehabilitation
No full textThe purpose of land rehabilitation (LR) is to improve of landuse capability. Actually, LR needed participation of many institutions and policies. The objective of this research is to access the role, position, and function of each institution and each policy related to LR. The research methodology is intrepretation Structural Modelling (ISM). The result showed there are 26 institutions and 12 policies related to LR. Department of Forsetry, Environment Non-Government Organization (NGO), and District Department of Forestry have high score driver power and dependensy to LR programs
During vegetative growth period, sugarcane required a lot of water but decreasing afterward and minimum at ripening period. Sugarcane water requirement was calculated by radiation method and USDA (1969) method was used to determinate effective rainfall. Average of monthly actual evapotranspiration (ETa) was calculated by the available soil water index. The total of water requirement of sugarcane (1-12 month) was around 37.38 mmlmonth to 143.22 mmlmonth. The highest water requirement was found at age of 4 to 9 month, while the lowest was in the ripening period. Accordingly drip irrigation should be operated at maximum water use of about 3.96 mm/day, or by sprinkle irrigation not less than 118.70 mm/mounth.
No full textDuring vegetative growth period, sugarcane required a lot of water but decreasing afterward and minimum at ripening period. Sugarcane water requirement was calculated by radiation method and USDA (1969) method was used to determinate effective rainfall. Average of monthly actual evapotranspiration (ETa) was calculated by the available soil water index. The total of water requirement of sugarcane (1-12 month) was around 37.38 mmlmonth to 143.22 mmlmonth. The highest water requirement was found at age of 4 to 9 month, while the lowest was in the ripening period. Accordingly drip irrigation should be operated at maximum water use of about 3.96 mm/day, or by sprinkle irrigation not less than 118.70 mm/mounth
Simulation Study on Freeze-drying Characteristics of Mashed Beef
No full textDrying characteristic of a particular product is important in analyzing the appropriateness of the drying method for the product. This is especially important for freeze drying, which is known as the most expensive drying method, asideji-om its good drying quality. The objectives of this experiment are to develop a computer simulation program using a retreating drying-frontmodel for predicting freeze drying characteristics of mashed nteat, especially for the influence of sublimation temperature and thermal conductivity
Effectivitas of Pitcher Fertigation System on Bushes Pepper Crops
No full textThe successful application of pither irrigation system has motivated to investigate the pitcher as a fertigation system. The experiment was conducted at Leuwikopo Experiment Station, Agricultural Engineering Departement, Bogor Agricultural University. The main objective of this study is to study the effectiveness of pitcher fertigation system on bushes pepper crops. The result shows that the pitcher wall is capable to release NPK solution. Diffusion rate of fertilizer solution was measured as affected by the concentration inside and outside of the pitcher. The soil moisture distribution in the soil is sufficient to transport the solution available for crops development. Concentration of Phosphate (P) and Potassium (K) decrease laterally and the Nitrogen (N) tends to accumulate homogeneosly in moist part around the pitcher
Terminologi traktor beserta peralatan dan pengoperasiannya atau yang berkaitan dengan traktor, umumnya berasal dan berkembang dari negara-negara pembuat dan pengembang traktor pertanian. Ide awal dari penyusunan terminologi ini berasal dari usulan Prof. Dr. Jun SAKAI (JICA expert), dan diterima dengan baik oleh staf Laboratorium Alat dan Mesin Budidaya Pertanian, Jurusan Teknik Pertanian, FATETA, IPB, yang juga melihat perlunya penyusunan terminologi di bidang keteknikan pertanian agar orang-orang yang bergerak di bidang keteknikan pertanian berkomunikasi dalam istilah dengan pengertian yang sama.
No full textTerminologi traktor beserta peralatan dan pengoperasiannya atau yang berkaitan dengan traktor, umumnya berasal dan berkembang dari negara-negara pembuat dan pengembang traktor pertanian. Ide awal dari penyusunan terminologi ini berasal dari usulan Prof. Dr. Jun SAKAI (JICA expert), dan diterima dengan baik oleh staf Laboratorium Alat dan Mesin Budidaya Pertanian, Jurusan Teknik Pertanian, FATETA, IPB, yang juga melihat perlunya penyusunan terminologi di bidang keteknikan pertanian agar orang-orang yang bergerak di bidang keteknikan pertanian berkomunikasi dalam istilah dengan pengertian yang sama.