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PENGARUH PENAMBAHAN SEMEN PORTLAND TERHADAP LAPISAN PONDASI JALAN BERBAHAN TANAH LUNAK GAMBUT DI KALIMANTAN SELATAN Akhmad Gazali; Robiatul Adawiyah
Jurnal Transportasi Vol. 18 No. 3 (2018)
Publisher : Forum Studi Transportasi antar Perguruan Tinggi (FSTPT)

Abstract Subgrade conditions need to be considered in road construction. The area of Barito Kuala Regency, South Kalimantan Province, is a soft soil area of peat that has low soil carrying capacity and low CBR values. To build roads in this area, a study is needed on the effect of adding portland cement in increasing the carrying capacity and CBR value of the soil. All tests performed in this study are based on the ASTM method. In this study, the proportion of portland cement added to native soil was 5%, 10%, 15%, and 20% of the mixture weight. Curing was carried out before the CBR test, with the curing period of 7 days, 14 days, 21 days and 28 days. Based on the results of the analysis, it was found that for the original soil with a 7-day curing period, the CBRmax value was 4.0639% and for mixed soil with optimum cement content of 20% with curing period of 7 days, 14 days, 21 days and 28 days giving CBRmax values of 10.282%, 16.966%, 20.685%, and 21.801%, respectively. Keywords: subgrade, soft peat soil, portland cement, soil carrying capacity Abstrak Kondisi tanah dasar perlu diperhatikan dalam pembangunan jalan. Daerah Kabupaten Barito Kuala, Provinsi Kalimantan Selatan, merupakan daerah tanah lunak gambut yang mempunyai daya dukung tanah dan CBR yang rendah. Untuk membangun jalan di daerah ini diperlukan penelitian tentang pengaruh penambahan semen portland dalam meningkatkan daya dukung dan nilai CBR tanah. Pengujian pada penelitian ini didasarkan pada metode ASTM. Pada studi ini, proporsi semen portland yang ditambahkan pada tanah asli adalah 5%, 10%, 15%, dan 20% terhadap berat campuran. Pemeraman dilakukan sebelum melakukan uji CBR, dengan masa pemeraman 7 hari, 14 hari, 21 hari, dan 28 hari. Berdasarkan hasil analisis diperoleh bahwa untuk tanah asli dengan masa pemeraman 7 hari memberikan nilai CBRmaks sebesar 4,0639% dan untuk tanah campuran dengan kadar semen optimum 20% dengan pada masa pemeraman 7 hari, 14 hari, 21 hari, dan 28 hari memberikan nilai CBRmaks masing-masing sebesar 10,282%, 16,966%, 20,685%, dan 21,801%. Kata-kata kunci: tanah dasar, tanah lunak gambut, semen portland, daya dukung tanah

Kefeektifan Beberapa Jenis Daun Tanaman Sebagai Antifeedant untuk Mengendalikan Kutu Beras (Sitophilus oryzae L.) Satrio Wicaksono; Akhmad Gazali; Jumar Jumar
Agroekotek View Vol 1, No 2 (2018)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/agtview.v1i2.683

Rice is a staple food commodity consumed by 95% of Indonesia's population in addition to corn, sago and sweet potato. That rice consumption reached 139.15 kg per capita per year, far exceeding the world average consumption of 60 kg per capita per year. However, the high consumption of rice, not accompanied by a significant increase in rice productivity annually. Generally, post-harvest pests that exist in the deposited material is from the Coleoptera class, one of them is Sitophilus Oryzae L. Pest controls Sitophilus Oryzae L until now still use chemical pesticides and fumigation. Fumigants used in fumigation in Bulog warehouses today consist of Phosphine and Methyl bromide. The use of chemical pesticides in pest control has many negative impacts. The problem of environmental pollution is a clear consequence, besides the use of chemical pesticides in Indonesia has destroyed 55% of pest species and 72% of biological control agents. Therefore, it is necessary to replace environmentally friendly pesticides, One alternative choice is the use of vegetable pesticides. The vegetable pesticide is one of the pesticides which material comes from plants. This research uses Completely Randomized Design (CRD) with one factor. The treatment used in this research is 13 treatments with 3 replications, resulting in 39 units of experimental unit. Unit placement is done randomly on 39 barriers available. The results show that the treatment of repellent and antifeedant plant extracts affected on the population of rice lice and rice damage by rice lice. Plants that are able to make the population of rice lice decline namely Wuluh starfruit with a dose of 50 grams and which is able to reduce the damage of rice that soursop leaves with a dose of 40 grams

Pengaruh Aplikasi Bacillus thuringiensis Terhadap Populasi Predator dan Parasitoid pada Sawi Hendra Manyu; Akhmad Gazali; Jumar Jumar
Agroekotek View Vol 1, No 1 (2018)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/agtview.v1i1.655

The purpose of this study was to investigate the effect of Bacillus thuringiensis on the predator and parasitoid populations of mustard greens and to identify species of predators and parasitoids in Bacillus thuringiensis treated sauce. This study used a single factor Randomized Block Design with 5 treatments and 4 replications. The treatment consists of a). Control (water) b). Bacillus thuringiensis solution (2cc / l water) c). Bacillus thuringiensis solution (4 cc / l water) d). Bacillus thuringiensis solution (6 cc / l water) e) Bacillus thuringiensis solution (8 cc / l water). The results showed that the administration of Bacillus thuringiensis did not affect the predation of trapped predator and parasitoid populations, and found 12 species of predators consisting of 3 ordo of Arachnida, Coleoptera, Orthoptera, and parasitoid species of 8 species from Hymenoptera ordo.

Pengaruh Bokashi Eceng Gondok Terhadap Pertumbuhan Cabai Rawit (Capsicum frutescens L.) Varietas Hiyung Pada Fase Vegetatif Muhammad Ahyan; Antar Sofyan; Akhmad Gazali
Agroekotek View Vol 2, No 3 (2019)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/agtview.v2i3.1245

Cayenne pepper (Capsicum frutescens L.) the one is horticultural plants of the Solanaceae family that has high economic value. Cayenne pepper is used as a spice in cooking and medicine. The average national production of cayenne pepper in 2009 was 5.89 t ha-1, whereas in South Kalimantan in 2009 it was 4.4 t ha-1. This was due to uncertain season, also the handling of how to cultivate cayenne cultivation was less than the maximum For example, irrigation is still a matter of relying on rain and the use of seeds that are not selected, as well as the application of fertilizers that are not optimal. Water hyacinth is an alternative source of organic material that is widely available in waters that are not utilized, but can be used as pupu bokashi. This study aims to determine the different effects of the administration of several types of bokashi fertilizer to the growth of the chili variety in the vegetative phase. This study uses a completely randomized one factor in the form of water hyacinth dose consisting of 5 levels, P0 = Control (5 kg soil + 1 kg chicken manure fertilizer) / poly bag P1 = 10% g bokashi water hyacinth P2 = 20% g bokashi fertilizer water hyacinth P3 = 40% g bokashi fertilizer water hyacinth P4 = 80% g bokashi fertilizer water hyacinth. The observation variables in this study were plant height, stem diameter and number of flowers. The results of this study show that the application of water hyacinth bokashi has a significant effect on the diameter of the stem at the age of 35 HST where the best treatment is in the treatment P4 = 80% g of bokash ieceng goiter with 0.60 cm in diameter.

Respon Pertumbuhan dan Hasil Tanaman Selada (Lactuca sativa L.) Terhadap Pemberian Dosis Pupuk Hijau dan Bokashi Kirinyuh pada Tanah Ultisol Isnawati Isnawati; Zairin Zairin; Akhmad Gazali
Agroekotek View Vol 1, No 3 (2018)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/agtview.v1i3.705

This study aims to determine the response of growth and yield of lettuce (Lactuca sativa L.) to the dosage of green manure and bokashi kirinyuh on ultisol soil and to know the dose of green manure or bokashi kirinyuh which gives growth and yield of the highest lettuce plant. Performed At Greenhouse with Native Design. Factor A (type of fertilizer) is the type of green manure and bokashi while factor B (dose in the type of fertilizer) ie dose 125, 250 and 375 grams. So there are 6 treatments and repeated 4 times, so obtained 24 units of experiments and multiplied by 2 polybags, so there are 48 plants. In the observation of consumption harvest (40 days after planting) type of fertilizer affect the number of leaves and dry weight of the top of the plant. The dose in the fertilizer has a very significant effect on the wet weight of the upper part of the plant during the consumption harvest and the wet weight as the initial observation of the appearance of the flower. Bokashi with a dose of 375 grams yields the highest average against the wet weight of the upper part of the crop at the time of consumption harvest and at the onset of interest. The dose of 250 grams of bokashi is the best dose against the average wet weight of the top of the plant at the beginning of the flower

Keanekaragaman Arthropoda pada Pertanaman Sawi yang Diberi Perlakuan Penyemprotan Ekstrak Akar Tuba (Derris elliptica L.) Toni Suryanto; Akhmad Gazali; Untung Santoso
Agroekotek View Vol 3, No 1 (2020)
Publisher : Universitas Lambung Mangkurat

Organism disturbing plant is commonly found in the area of mustard planting that causes of losing production. The attempt to overcome organism disturbing plants to prevent using environmental pest control as an alternative substitute for chemical pesticides. The tuba plant (Derris elliptica L.) is one of the plant that can be used for biopesticide that has a compound poison called Rothenon (C22H2306). The purpose of this study is to know how the effect of several doses of the tuba root extract (Derris elliptica L.) in the level of arthropod diversity and determine the doses of the tuba root extract to produce highest of index diversity (H’) on a mustard green plant. The study was carried out at Experimental Field of the Faculty of Agriculture Lambung Mangkurat University on Banjarbaru, South Kalimantan From May – July 2018. Diversity is determined with the index of diversity (H’) Shannon-Wienner, the evenes of the index (E), the richness of index (R) and the domination of index (C). The design of this research is to use a completely randomized design consisting of 1 factor with 5 treatment. The research of this study indicates of the highest arthropod diversity is to T0 (0 g/l) of 2,53 and the lowest result is to T5 (8 g/l of water) at 2,16. The evenes index (E) and the richness index (R) of all treatment have steady dissemination of elevated index and the value of index domination (C) is close to zero which means there are no species dominating this field research. The sprayed pesticide on the mustard green plant was affected by the percentage of leaf damage, by using a dose of 4g/l of water was able to give a real result to the wet weight it causes the whole treatment has been given the same dosage of manure.

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