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All Journal Jurnal Ilmiah Inovasi Jurnal Pengelolaan Perkebunan (JPP)
Nanda Satya Nugraha
Institut Pertanian STIPER Yogyakarta
Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Education Other

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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. 
Keragaan Kualitas Pertumbuhan Batang Pohon Balsa (Ochroma pyramidale) Umur 1 Tahun Di KP2 INSTIPER Ungaran Siman Suwadji; Nanda Satya Nugraha; Sri Widata
Jurnal Ilmiah Inovasi Vol 26 No 02 (2026): Agustus (In Progress)
Publisher : Politeknik Negeri Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25047/jii.v26i02.7198

Abstract

This study aimed to evaluate the growth performance of stem quality in 1-year-old balsa (Ochroma pyramidale) trees using the census method (100%). The research was conducted in April 2026 at the Educational and Research Forest (KP2) INSTIPER Ungaran, assessing a total population of 53 sample trees. The observed parameters included diameter at breast height (DBH), total height, clear bole height (CBH), stem straightness, number of active branches, stem taper, apical dominance, and pest/disease infestation levels. The stem quality assessment was calculated using the Stem Quality Index (SQI). The results showed an average DBH of 3.99 cm and an average total height of 283.23 cm. Based on the SQI values, the majority of the balsa trees fell into Quality Class B (Good) at 77.36%, followed by Class C (Moderate) at 9.43%, Class D (Poor) at 11.32%, and Class A (Excellent) at 1.89%. Correlation analysis among variables revealed a strong positive correlation between DBH and total height, while a negative correlation was found between the percentage of clear bole height and the total stem quality score, indicating that young trees have not yet optimally developed a stable mature canopy.
Co-Authors Bimantio, Mohammad Prasanto Dian Pratama Putra Ferhat, Amallia Siman Suwadji Sri Widata