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Journal : Tropical Plantation Journal

Ecophysiology of Growth and Yield of Several Local Rice Varieties (Oryza Sativa L.) withVarious Kinds of Irrigation Bambang Heri Isnawan; - Hariyono; Iffa Nur Adillah
Tropical Plantation Journal Vol 2, No 2 (2023): TROPICAL PLANTATION JOURNAL
Publisher : Akademi Komunitas Perkebunan Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56125/tpj.v2i2.30

Abstract

A research aims to examine the physiology, growth and yield of rice in several varieties of rice plants with System of Rice Intensification and conventional irrigation methods. The study was conducted using 3x4 factorial strip plot design arranged in a Completely Randomized Block Design with 3 blocks as replications. The first factor was the type of irrigation that had 3 treatments, i.e.,  irrigation, intermittent irrigation: 10 days inundated, 5 days drained and intermittent irrigation: 7 days flooding, 3 days drying. The second factor was the rice varieties consisting of 4 varieties, i.e., Rojolele Genjah, Mentik Wangi, Mentik Susu and Cempo Hitam.The results showed that the plant height of the Rojolele Genjah variety was higher than other varieties. The grain yield per hectare of Mentik Wangi, Mentik Susu and Cempo Hitam varieties were higher than the Rojolele Genjah Variety. The treatment of irrigation for 7 days of flooding and 3 days of drying was greater than other irrigation for panicle length, and harvest index. CGR of conventional irrigation treatment was greater than intermittent irrigation. There was interaction between varieties and irrigation on the leaf area of rice plants, which in Cempon Hitam Variety with irrigation intermittently 10 days of flooding 5 days drying had the broadest leave area.
The Effect of Sample Weigh, Incubation Duration And Isolation Methods on The Quality of Phalaeonopsis amabilis root DNA Handayani, Etty; Rineksane, Innaka Ageng; Isnawan, Bambang Heri; Setiawan, Haris Anggita; Manto, Agus
Tropical Plantation Journal Vol 4, No 2 (2025): TROPICAL PLANTATION JOURNAL
Publisher : Akademi Komunitas Perkebunan Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56125/tpj.v4i2.63

Abstract

Orchid Ph. amabilis is one of the plants designated as "Indonesian National Flower" and designated as "Puspa Pesona Indonesia". Orchid Ph. amabilis has a diversity that is not widely known, so that it is necessary to identify it molecularly. DNA isolation is the first step in molecular testing. This study aims to determine the sample weight, incubation time and the appropriate isolation method for DNA isolation from samples of Ph.amabilis orchid roots. In this study, the DNA isolation stage used two experimental methods, namely the CTAB method (Murray and Thompson) and the mini kit. The research method used was a single factor experiment with a combination of sample weight and incubation time consisting of 6 treatments with 3 replications, so 18 experimental units were obtained. The experimental treatment used was from the roots of the orchid Ph. amabilis which has a sample weight of 0.25 g, 0.5 g, and 0.75 g and each sample weight treatment was incubated for 30 minutes and 60 minutes. In addition, DNA isolation using the kit method had a sample weight of 0.25 g, 0.5 g and 0.75 g and an incubation period of 10 minutes. The results showed that the DNA isolation of Ph. amabilis with a sample weight of 0.75g, incubation time of 30 minutes using the CTAB method showed the best treatment in producing DNA with a concentration of 384 ng/µl and a purity of 1.9. This study is expected to provide information on sample weight, incubation time and the appropriate method for DNA isolation of Ph. amabilis orchid roots.
Study of Liquid Organic Fertilizer Application with Empty Palm Oil Bunch Ash Nano on Soyabean (Glycine max L.) Samidjo, Gatot Supangkat; Mulyono, Mulyono; Isnawan, Bambang; Febriani, Henny; Ngafwan, Ngafwan
Tropical Plantation Journal Vol 5, No 1 (2026): TROPICAL PLANTATION JOURNAL
Publisher : Akademi Komunitas Perkebunan Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56125/tpj.v5i1.85

Abstract

Proper fertilization is an effort to increase soybean production. This study aimed to examine the effect of Liquid Organic Fertilizer (LOF) application enriched with Empty Palm Oil Bunch (EPOB) Ash Nano  and determine the optimal concentration on soybean growth and yield. This research was carried out at the Experimental Field of the Faculty of Agriculture, Universitas Muhammadiyah Yogyakarta. This research was conducted using a single factor experimental method which was arranged in a Completely Randomized Design. The treatments tested were rabbit urine LOF; Rabbit urine LOF + EPOB Ash Nano 1%; Rabbit urine LOF + EPOB Ash Nano 2%; Rabbit urine LOF + EPOB Ash Nano 3% and rabbit urine LOF + EPOB Ash Nano 4%. The results showed that the application of  rabbit urine LOF + EPOB Ash Nano 4% could increase soybean growth and was able to increase the dry weight of 100 seeds. Application of rabbit urine LOF enriched with EPOB Ash Nano can save nitrogen nutrient fulfillment for soybeans by up to half the recommended dose. 
Farmers' Behavior Towards the Risks of Cabbage and Chicory Farming in Plaosan District, Magetan Regency, East Java Sriyadi, Sriyadi; Isnawan, Bambang
Tropical Plantation Journal Vol 5, No 1 (2026): TROPICAL PLANTATION JOURNAL
Publisher : Akademi Komunitas Perkebunan Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56125/tpj.v5i1.86

Abstract

Vegetable horticultural goods like chicory and cabbage often face production and income risks. Rational farmers tend to be risk averse. Disparities in decision-making can result from individual differences in risk aversion. This study aims to (1) analyze the level of risk of costs, production, and income of cabbage and chicory farming; (2) analyze farmers' behavior towards the cost risk, production, and income of cabbage and chicory farming; and (3) analyze social factors that affect farmers' behavior on the risks of cabbage and chicory farming. A descriptive analytical method was used in the study. Observation and structured interviews with 100 farmers of cabbage and 100 farmers of chicory utilizing questionnaires were used to gather data. The findings indicate that growing cabbage is riskier than growing chicory. Regarding both commodities, the majority of farmers behave in a risk-averse manner. Risk aversion falls with better education, more years of agricultural experience, larger households, and higher farm revenue, but rises with larger acreage, older age, and more frequent crop failure. In general, farmers who grow cabbage are less willing to take risks than those who grow chicory. In order to lower farming hazards and increase revenue stability, extension programs are crucial for enhancing farmers' knowledge of the best times to grow chicory and cabbage.