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All Journal Jurnal Pendidikan IPA Indonesia Journal of the Indonesian Tropical Animal Agriculture
H. Hidayat
Faculty of Agriculture, Bengkulu University Jl. WR Supratman, Kandang Limun Bengkulu, 38371
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Education

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THE EFFECT OF PLANTING SPACE AND LEVEL OF PHOSPHOR FERTILIZER DOSE ON GROWTH, DRY MATTER YIELD, AND CRUDE PROTEIN CONTENT OF Indigofera arrecta Akbarillah, T.; Hidayat, H.
Journal of the Indonesian Tropical Animal Agriculture Vol 35, No 2 (2010): (June)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.35.2.120-123

Abstract

Study on Indigofera arrecta has not been explored widely yet. Therefore, its growth characteristicand its nutritive value need to be studied. The research was conducted to evaluate growth characteristicand its nutritive value of Indigofera arrecta planted on different planting spaces and different levels ofNPK fertilizer dose. Two factors experiments were assigned in a Split-Plot Design. The first factor (A)was planting space, (1) 50x50 cm and (2) 75x75 cm. The Second factor (B) was level of fertilizer dose,(1) 0 kg P2O5/ha+100kg K2O/ha, (2) 100kg P2O5/ha +100kg K2O kg/ha and (3) 200kg P2O5+100kgK2O/ha. The results showed that planting space had no effect on height of plant (P>0.05) but diameter ofstem were statistically different (P<0.05). In addition, their dry matter yield and crude protein contentwere not different (P>0.05) on either planting space or P fertilizer dose. There were no interactionbetween planting space and P fertilizer dose. In addition, there were no effects either planting space or Pfertilizer dose on dry matter edible part, crude protein content, and plant height. Indigofera arrectaplanted on wider planting space produce bigger stem diameter and bigger number of branch.
Students' Environmentally-Friendly Behavior: The Mediating Effect Investigation Desnita, D.; Usmeldi, U.; Hidayat, H.
Jurnal Pendidikan IPA Indonesia Vol 12, No 1 (2023): March 2023
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v12i1.40219

Abstract

The discovery of problems linked to environmentally-friendly behavior and several antecedent factors motivates this study. This study examines the effect of environmental physics understanding, scientific reasoning, and environmental behavior intentions on environmentally-friendly behavior and investigates the mediating role of scientific reasoning and environmental behavior intentions. This quantitative study used an associative approach. The research population was high schoolers in West Sumatra. The research sample was 407 high schoolers in West Sumatra, obtained through convenience sampling. Data were collected by applying a questionnaire. The research objectives were answered with a structural equation modeling approach. In this study, environmental physics understanding, scientific reasoning, and environmental behavior intentions are significant predictors of environmentally-friendly behavior. The results show that scientific reasoning had a mediating effect on the relationship between environmental physics understanding and environmentally-friendly behavior (β= 0.098, t = 1.794, p-value = 0.006). The environmental behavior intention has no mediating effect on the relationship between scientific reasoning on environmentally-friendly behavior (β= 0.045, t = 1.843, p-value = 0.066) and environmental physics understanding on environmentally-friendly behavior (β = 0.018, t = 1.467, p-value = 0.143). This study has limitations where data are only collected in high schools in West Sumatra, so generalizations are limited. Cross-sectional data add a further limitation to it. Conversely, this research augments the current literature on environmental physics understanding, scientific reasoning, and environmental behavior intentions by focusing on previously unstudied environmentally-friendly behavior. Furthermore, this study offers a novel theoretical explanation for the relationship between realizing the mediating role of scientific reasoning and environmental behavior intentions.
Co-Authors Desnita Desnita T. Akbarillah Usmeldi Usmeldi