Penerapan Sistem Monitoring Hidroponik berbasis Internet of Things (IoT)

Hydroponics is a method of planting without using soil media by utilizing water. The problem occurs when the farmer cannot control the water used in hydroponic. Therefore, we need a system to monitor the amount of water used in the hydroponic planting system. This service activity aims to develop and implement a hydroponic monitoring system based on IoT. This activity was carried out by students, followed by several accompanying lecturers. It aims to assist partners in measuring water content, temperature, and water pH in hydroponic plants. One of the business unit partners for this activity is SMEs engaged in hydroponic agricultural cultivation at the Science Technology & Industrial Park (STIPARK) NTB. This community service activity was held for four months. From the process of analyzing partner problems, they were testing the STIPARK management and hydroponic SME business partners and the community who later needed a hydroponic monitoring system based on the Internet of Things so that information could be received in real-time. This product can help hydroponic SME business partners know the level of water levels or nutrients, monitoring water temperature and water pH to help farmers increase crop yields from hydroponic cultivation.

The Key Factors for the Fate and Transport of Petroleum Hydrocarbons in Soil With Related in/ex Situ Measurement Methods: An Overview

Once petroleum hydrocarbons (PHs) are released into the soil, the interaction between PHs and soil media is dependent not only upon the soil properties but also on the characteristics of PHs. In this study, the key factors influencing the interactions between PHs and soil media are discussed. The key factors include: 1) the characteristics of PHs, such as volatility and viscosity; and 2) soil properties, such as porosity, hydraulic properties and water status, and organic matter; and 3) atmospheric circumstances, such as humidity and temperature. These key factors can be measured either ex-situ using conventional laboratory methods, or in situ using portable or handheld instruments. This study overviews the current ex/in situ techniques for measuring the listed key factors for PH contaminated site assessments. It is a tendency to apply in situ methods for PH contaminated site characterisation. Furthermore, handheld/portable Fourier transform infrared spectroscopy (FTIR) instrument provides tremendous opportunities for in-field PH contaminated site assessment. This study also reviewed the non-destructive FTIR spectroscopy analysis coupling with handheld FTIR for in-field PH contaminated site characterisation, including determining the concentration of total PH, dominant PH fractions and soil key properties for PH transport modelling.

Field accumulation and translocation of potentially toxic elements (PTEs) from industrial soil by the biodiesel plant, Jatropha curcas

Samples of Jatropha curcas, a non-edible biodiesel plant, which tolerates harsh environments was collected from an industrial area with high anthropogenic activities (Challawa Industrial area, Kano, Nigeria)and sorted into leaves, stems and roots. The aim is to assess the potentials of Jatropha curcas in accumulation and translocation of six Potentially Toxic Elements (PTEs) (Zn, Cu, Cd, Cr, Pb and Ni) from the soil media. Atomic Absorption Spectroscopy (AAS) was used to assess the concentrations. The bioaccumulation/ transfer of metals from roots to shoots and from soil to roots were evaluated in terms of translocation (TF) and bioconcentration factor (BCF). TF values of 1.02, 4.92, 2.68, 3.73, 1.5 and 3.19 for Zn, Cu, Cd, Cr, Pb and Ni respectively indicate that J. curcas was efficient in translocation of PTEs from roots to shoots. This is an indication that the plant is therefore suitable for phytoextraction of Zn, Cu, Cd, Cr, Pb and Ni. But CF value of 0.66 and 0.70 for Cu and Pb on the other hand shows that J. curcas is less able to translocate these two metals (Cu and Pb) indicating ineffective transfer. This show that J. curcas may be suitable a candidate for phytostabilization of Copper and lead in contaminated soils in the study area.

Multi-layer Budding of Oversized Rubber (Hevea brasiliences) Seedlings: Success and Growth in Different Soil Media

The study on Multi-layer budding of oversized rubber seedling aimed at evaluating the success of multiple budding operation on single seedling of rubber tree species comprising of 4 to 7 budding layers per seedling. The experiment used randomized complete blocked design layout with 3 treatments such as 4, 5 and 7 layer budding in a single seedling replicated 4 times. Results revealed that the highest number of budding layers succeeded significantly higher as compared to 4 and 5 layers. The main survival percentage is about 79.17% for the 7 layers, 76.52% for the 5 layers and only about 55.36% for the 4 layers. Pure garden soil reported to have significant results on sprouting rate, sprout length, stalk diameter and number of leaves. This finding emphasized that budding of rejected oversized rubber seedlings grown in an abandoned nurseries can be reutilized for mass production of budded cuttings through multiple budding of 7 layers per seedlings to maximize planting materials derived from single seedlings.

PERTUMBUHAN DAN PRODUKSI TANAMAN SELADA (Lactuca sativa L.) PADA SISTEM HIDROPONIK NFT DENGAN BERBAGAI KONSENTRASI PUPUK AB MIX DAN GROWMORE

One of the efforts to continuously increase lettuce production is by using hydroponic technology. Hydroponics is a way of farming without using soil media but using water or porous materials. Nutrient Film Technique (NFT) including hydroponic farming methods. In this system, some of the roots of the plants are submerged in water that contains fertilizer and some are above the surface of the water with a continuous 24 hours of circulation. The research was conducted from June to November 2020. The research was carried out on the Hydroponic Roof Top of the Red Building. Plantation Cultivation. This research method used a non-factorial randomized block design (RBD), the treatment of 1100 ppm AB Mix nutrition at the age of 1-14 days, 1300 ppm from the age of 21-28 days, 1500 ppm at the age of 29 - 35 days and B2 = Fertilizer Growmore 1100 ppm at the age of 1 - 14 and 1300 ppm from the age of 21 - 28 days, 1500 ppm at the age of 29 - 35 days Each treatment consists of 20 sample plants.The results showed a significant difference in the application of AB Mix fertilizer to Growmore fertilizer from week 1 to week IV on plant height increase, number of leaves and wet weight or yield on lettuce plants.

Groundwater Vulnerability Mapping in Muntilan and its Surrounding Area, Magelang Regency, Central Java, Indonesia

Groundwater resources are vital for residents in Muntilan Sub-District and its surrounding area in Central Java. The residents use groundwater for daily consumption by developing dug wells. Therefore, groundwater sources from contamination should be protected to guarantee sustainable groundwater use in this area. Groundwater vulnerability maps can be used as basic information to prevent groundwater contamination, land-use planning, and groundwater resources management. Therefore, this study aims to develop the groundwater vulnerability map in the Muntilan, Salam, Ngluwar Sub-Districts, Magelang Regency, Central Java. The vulnerability assessment used the DRASTIC method. The method has used the sum of the weighting of various parameters, including topography, net recharge, groundwater depth, the impact of the vadose zone, soil media, hydraulic conductivity of the aquifer, and aquifer media. The analysis results described that the DRASTIC Index (DI) value ranges from low to high levels, low levels, and the moderate level of vulnerability covers Muntilan sub-district and salam sub-district, while high levels of vulnerability are located in Muntilan, Ngluwar, and Salam Sub-Districts. Therefore, this vulnerability can be used for regional spatial planning and groundwater protection in the district.

MODIFIKASI MEDIA TANAM UNTUK MENINGKATKAN MUTU BIBIT HANDEULEUM (Graptophyllum pictum L. (Griff.)) DARI BEBERAPA MACAM ASAL STEK

The research titled "Modification of Planting Media to Improve the Quality of Handeuleum (Graptophyllum Pictum L.) Seedling from Several Kinds of Cuttings Source", was conducted in Sukoharjo, Central of Java. The first treatment was the kind of cuttings source, namely: cuttings from the shoot (S1), cuttings from the second section (S2), and cuttings from the third section (S3). The second treatment factor is the kind of media: sandy soil media (M1), rockwool media (M2), and cocopeat media (M3). The data obtained were analyzed by using the F test at 5% and 1% significantly levels, while the follow-up test was carried out using Duncan's multiple range test at the 5% significantly level. The results obtained indicated that the S treatment (kind of cuttings source) had a significant effect on the variables of the number of branches, number of leaves, and leaf area of ​​each seedling. The highest number of branches and leaves was achieved in the S3 treatment (third section cuttings), followed by S2 (second section cuttings) and S1 (shoot cuttings) treatments. There were a significant difference between the treatments. In leaf area variables, the highest yield was achieved at S1 (shoot cuttings), followed by S2 and S3 which were significantly different between each other. Treatment S showed no significant effect on variables the appearance time of the buds, fresh weight of leaves and dry weight of leaves. The treatment of various media had a significant effect on the leaf area variables of each seedling. Cocopeat media (M3) produced the highest leaf area, followed by M1 (sand media), and M2 (rockwool media) treatments. There was no interaction between treatments of kind of cuttings source and types of media for all observed variables.