The development of aquaculture with a hydroponic system is now more and more chosen by the community because of the increasingly limited land, but also comparable to the increasing demand for water. Hydroponics with the Nutrient Film Technique (NFT) system can be used as a solution to the water needs needed in the cultivation of hydroponics plants. This study aims to design the hydroponic installation of the NFT system and grow plants in the NFT system. The study was conducted with the stages of making the hut, making the installation, seeding, making nutritional solutions and transferring seed to the installation. The research will be conducted for five months. Descriptive research with qualitative data obtained is the way of making the NFT system, plant growth speed and the amount of water needed. Making the installation begin with the construction of the hut and shade then arranges the installation. For lettuce, the harvest time is 38 days dan tomatoes 50 days after the plants are moved to the plant. The need for water in the NFT hydroponic system is 190 liters.

Usaha perkebunan kelapa sawit menghasilkan limbah yang perlu dilakukanpengelolaan agar tidak berdampak bagi lingkungan. Serabut (fiber) kelapa sawitmerupakan salah satu limbah yang masih sedikit pemanfaatannya. Kandungan haraserabut kelapa sawit meliputi N, P, K, Mg dan Ca dan 44,4 % selulosa berpotensiuntuk dimanfaatkan dalam bidang pertanian.Jamur tiram putih (Pleurotus ostreatus)merupakan jamur kayu yang memerlukan nutrisi seperti selulosa dan lignin untukpertumbuhannya. Penelitian ini bertujuan mengetahui potensi serabut (fiber) kelapasawit sebagai media tanam alternatif bagi jamur tiram putih. Parameter yang diamatimeliputi berat segar basah badan buah dan frekuensi panen. Hasil menunjukanbahwa jamur mampu tumbuh pada formulasi media Y2 (83% fiber, 15% dedak, 2%kapur) dan Y1 (41,5% fiber, 41,5% serbuk kayu, 15% dedak, 2% kapur) denganproduksi berat segar yang tidak berbeda signifikan dengan jamur pada media kontrol.Frekuensi panen pada media Y1 dan Y2 hanya sebanyak 3 kali dibandingkan kontrolyang dapat dipanen sebanyak 5 kali.

Tujuan penelitian adalah untuk mengetahui kandungan HCN pada daging biji karet setelah dilakukan perendaman dan perebusan.  Tahapan penelitian dimulai sortasi biji karet, ekstraksi biji karet, reduksi HCN, dan analisis HCN.  Penelitian merupakan percobaan di laboratorium dengan menggunakan Rancangan Acak Lengkap (RAL) faktor tunggal. Faktor yang diteliti adalah teknik reduksi HCN pada daging biji karet terdiri dari 8 perlakuan dan setiap perlakuan diulang sebanyak 3 kali, sehingga diperoleh 24 satuan percobaan.  Faktor yang diteliti adalah M untuk klon PB 260 dan R untuk klon PR 300. 0 (tanpa perendaman dan perebusan); 1 (Perendaman 24 jam); 2 (Perebusan 90 menit); dan 3 (Perendaman 24 jam  + perebusan 90 menit).  Kandungan HCN biji karet paling rendah terdapat pada klon PR 300 dengan perlakuan perendaman 24 jam dan  perebusan 90 menit.   Kata Kunci : biji karet, HCN, perebusan, perendaman

Observations of soil conservation are carried out using qualitative method with descriptive, wwhere field activities include observations of vegetatif method, mechanic method and chemical method. Oil Palm plantation of PT. Citra Putra Kebun Asri uses 2 soil conservation methods, that is vegetative and mechanical methods. Vegetative method is carried out by utilizing litter (mulching), namely by arranging the oil palm fronds of prunning result in dead gawns with the aim of supressing growth of weeds and prevent erosion. Mechanical method is done by applying trenches and rorak. Trenches just made in low areas with the aim of being a drainage channel for block are not inundated and making rorak as a shelter for crop residues in the dry season to keep it moist.

Weeds have a direct influence on the growth and yield of oil palm production, resulting in various losses. Weed control aims to suppress growth or destroy weeds in plantations. In order to reduce the risk of failure in weed control, weed inventory activities need to be carried out first. Weed inventory is an activity to collect data on the types of weeds, and is expected to reveal potential and information about weeds. The purpose of this study was to identify and recognize the diversity of weed species that can be used as the basis for weed control in the productive phase of oil palm plantations at the Plantation Seed Monitoring and Certification Center. The method used in this study was a descriptive qualitative approach. The results of the study found 2 divisions, 4 classes, 13 orders, 18 families, 22 genera and 22 plant species on oil palm plantations with narrow, broad, and ferns. In general, based on the results of the inventory, broadleaf weeds were more common than narrow leaf weeds and fern weeds.