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All Journal Jurnal Agroekoteknologi Jurnal Pengelolaan Perkebunan (JPP)
Dian Pratama Putra
Institut Pertanian Stiper Yogyakarta
Agriculture, Biological Sciences & Forestry

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SMARTFERTI, SISTEM PAKAR PEMUPUKAN KELAPA SAWIT BERBASIS ANDROID Erick Firmansyah; Dian Pratama Putra
Jurnal Agroekoteknologi Vol 11, No 1 (2019)
Publisher : Jurusan Agroekoteknologi Fakultas Pertanian Untirta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/jur.agroekotek.v11i1.7614

Abstract

ABSTRACTKnowledge of good fertilization for oil palm on smallholder farmers is still limited.The availability of fertilizer knowledge both from primary sources and in theliterature as a secondary source, does not make it easy for farmers. An expert system is built in the form of a mobile application to implement the available knowledge base to provide fertilizer recommendations. The oil palm fertilization expert system in this research is called SmartFerti. SmartFerti is developed with a reasoning approach using a forward chaining method. The application design is based on the type of nutrients, planting density (stand per hectare, SPH), land area, type of fertilizer, and location. SmartFerti was built using 8 knowledge bases collected from reputable sources which were processed to obtain conclusions. SmartFerti provides fertilizer recommendations which include doses per semester and application time for 11 provinces in Indonesia. Nutrients that can be recommended include nitrogen, phosphorus, potassium, calcium, and magnesium. SmartFerti fertilization expert system uses an android-based interface built using App Inventor 2,0 (www,appinventor,mit,edu).
Stevia rebaudiana Bertoni M. Under Stress Condition: An Environmental Case Dian Pratama Putra; Prasanto Bimantio; Amallia Ferhat; Nanda Satya Nugraha
Jurnal Pengelolaan Perkebunan (JPP) Vol. 2 No. 2: September 2021
Publisher : Politeknik LPP Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54387/jpp.v1i1.6

Abstract

The importance of sugar makes every household life must have these sweeteners to meet daily needs. Stevia has several advantages including the level of sweetness that reaches 100-200 the sweetness of sugar cane and low calorie so safe to be consumed by diabetics and obesity. The possibilities of plants to grow on soil properties and fertility become an important issue in agricultural cultivation systems. In the case study conducted, this study looked at 4 behaviors that characterize the relationship between soil and Stevia, the relation was: (1) the condition of the soil and plants when water is lacking, (2) the condition of plants lacking nutrients, (3) differences in the type of soil and (4) conditions that contradict the growing conditions of Stevia. Data taken included: soil moisture content, soil NPK element content, plant and soil appearance descriptively and plant stevioxide content under stress conditions. The result stevia under stress conditions must be watered as much as 250 ml/day if below that the plant will wither in 1 week and if more than that the plant will experience root rot. Stevia which lacks nutrition when under stress will flower 1 month faster than usual, a condition where there are nutrients but high temperatures will trigger the wilt of stevia stems even though it has been watered 250 ml/day. This study also looked at the reaction of plants to different types of soil, where soils with more Stevia clay texture produce more leaves than those planted on sandy-textured soils. 
Co-Authors Bimantio, Mohammad Prasanto Erick Firmansyah Ferhat, Amallia Nanda Satya Nugraha