Water quality of the Panasen River in upstream of Tondano’s watershed is important to study because the Panasen River crosses residential areas, agriculture, and livestock farms, carrying solid and liquid wastes from these activities, which ultimately leads to Lake Tondano. This waste has the potential to become residue in Lake Tondano. The objective of this research was to study water quality of the Panasen River in the upper of the Tondano watershed throughout a five-year period (2014-2018). Water sampling is done by using composite sampling in the one location of Panasen River which become the inlet of Lake Tondano, analyzed using Colorimetry method, and compared with the Quality Satndard in accordance with the Law of No. 82/2001 Class II about Water Quality Management and Water Pollution Control (KLH, 2001). The results showed that 30 parameters (temperature, pH, TDS, TSS, NH3, DO, BOD, COD, chloride, CN, F, NO3, NO2, sulfate, sulphide, PO4, As, B, Ba, Cd, Co, Cu, Fe, Mn, Pb, Se, Zn, Hg, Cr-VI, surfactant (MBAS)) analyzed generally met the Water Quality Standard in accordance with the Law of No. 82/2001, except the chlorine parameter concentrations: Chlorine concentration in 2013 (0,1 mg-0,19 mg/l), 2014 (0,1 mg/l-0,44 mg/l), 2015 (<0,02 mg/l- 0,11 mg/l), 2016 ( 0,05 mg/l − 0,08 mg/l), 2017 (<0,02 mg/l-0,07 mg/l), 2018 (0,03 mg/l-0,06 mg/l). Average chlorine concentrations exceeded Quality Standards according to the Law of No. 82/200101 (Chlorine 0,03 mg/l). The high concentration of chlorine in the Panasen River water bodies is partly due to the application of KCI fertilizers, pesticides to rice fields, horticultural lands, and domestic waste.
The suitability of water for irrigation purpose can be determined using the Sodium Adsorption Ratio (SAR) method. The method describes the extent of sodium will be absorbed into the soil. This study aims to assess the water quality of the Talawaan river as a source of irrigation water using the Sodium Adsorption Ratio (SAR) method. The measurement was carried out by field observation at the tertiary channel and laboratory analysis of water samples obtained from the channel. The concentration of Na+, Ca2+, Mg2+ were calculating using the SAR. Sampling of Water quality parameters was determined using the Composite Sampling, then analyzed with the UV-Spectrophometry The data referring to the standard values from Ayers and westcott. The results showed that the Sodium Adsorption Ratio (SAR) at the Talawaan irrigation varied from 1.33 meq/l to 1.55 meq/l. These results meets the requirements of the Ayers and Westcott standard standard, which stated that SAR at less than 3 meq/L is good quality standard (table 2). SAR value affects soil conditions, especially related to soil structure and soil permeability and infiltration.
Pindol River is a river that is a source of irrigation water and raw water in Bolaang Mongondow Regency. The Pindol River is a source of the Lolak Dam water supply. The Lolak Dam which will irrigate rice fields covering an area of around 3,714 ha in Bolaang Mongondow Regency. The purpose of this study was to assess the water quality of the river Pindol as a source of irrigation water in terms of the value of Sodium Adsorption Ratio (SAR). The used method was field observation and laboratory analysis for river water samples. Water quality was carried out using the Composite Sampling Method in the Pindol River at two sampling points and three replications. The measured parameters were Na, Ca, Mg, as well as other chemical parameters. The measured data Na, Ca, Mg were calculating using the SAR formula. The data generated from laboratory analyzed descriptive statistics. The results showed that the concentration Na was 0.991 meq/l to 1.040 meq/l, Ca 0.281 meq/l to 0.292 meq/l, Mg 0.345 meq/l to 0.354 meq/l and Sodium Adsorption Ratio (SAR)at the Pindol River varied from 1.76 meq/l to 1.84 meq/l.
Chrysanthemum kulo plant is a variety native to The City of Tomohon which has a high aesthetic and economic value. Good quality chrysanthemum plant seeds can be obtained through vegetative multiplication techniques. One of the vegetative multiplication techniques is cuttings. The problem with the propagation of cuttings is that the rooting is less dense, so it can not hold the plant to grow upright. One source of natural growing regulators that can support the formation of roots is shallot bark. Shallot bark contains ABA, IAA, GA, Cytokinin. The purpose of this study was to study the interaction between concentration and length of soaking of shallot bark solution against the formation of cuttings root chrysanthemum shoots. This research was conducted in March 2021 until May 2021 at Screen House, Nursery, And Agrowidya Seeding Center of Tomohon City Tourism, Agriculture and Fisheries Office of Tomohon City. The design used is a Complete Randomized Design (RAL) Factorial with two factors, namely the first factor of concentration of shallot bark solution (K) consisting of 5 levels of 0%, 25%, 50%, 75%, 100% and the second factor soaking the shallot bark solution (T) consisting of 3 levels of 10 minutes, 20 minutes, 30 minutes. The variables measured are the percentage of root formation (%), the number of roots, and the length of the root (cm). Keywords: Chrysanthemum plants; Cuttings; Roots; Concentration, Shallot Bark.AbstrakTanaman krisan kulo merupakan varietas asli dari Kota Tomohon yang memiliki nilai estetika dan ekonomis yang tinggi. Bibit tanaman krisan yang berkualitas baik dapat diperoleh melalui teknik perbanyakan secara vegetatif. Salah satu teknik perbanyakan secara vegetatif ialah stek. Masalah pada perbanyakan stek yaitu perakaran yang kurang lebat, sehingga tidak dapat menahan tanaman untuk tumbuh dengan tegak. Salah satu sumber zat pengatur tumbuh alami yang dapat mendukung pembentukan akar adalah kulit bawang merah. Kulit bawang merah mengandung ABA, IAA, GA, Sitokinin. Tujuan dari penelitian ini adalah untuk mempelajari interaksi antara konsentrasi dan lama perendaman larutan kulit bawang merah terhadap pembentukan akar stek pucuk tanaman krisan. Penelitian ini dilaksanakan pada bulan Maret 2021 sampai bulan Mei 2021 di Screen House, Balai Perbenihan Pembibitan dan Agrowidya Wisata Kota Tomohon, Dinas Pertanian dan Perikanan Kota Tomohon. Rancangan yang digunakan adalah Rancangan Acak Lengkap (RAL) Faktorial dengan dua faktor yaitu pertama faktor konsentrasi larutan kulit bawang merah (K) yang terdiri dari 5 taraf 0%, 25%, 50%, 75%, 100% dan faktor yang kedua lama perendaman larutan kulit bawang merah (T) yang terdiri dari 3 taraf yaitu 10 menit, 20 menit, 30 menit. Variabel yang diukur adalah persentase pembentukan akar (%), jumlah akar, dan panjang akar (cm).Kata Kunci: Tanaman krisan; Stek; Akar; Konsentrasi; Kulit Bawang Merah.
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