The correlation of major growth parameters with the yield of cassava in different growth phases was investigated in 2013 and 2014. This experiment was conducted to assess the effect of two cassava varieties and the different growth phases to the yield and yield components. In experiment, the varieties as treatment were arranged in a randomized complete block design (RCBD) with three replications. Two varieties consisted of superior Adira-4 and local varieties Singgah were used. The growth parameters (plant height, stem diameter, leaf number) and yield components (number of tuber, weight per tuber and tuber yield) in early growth phase, maximum vegetative growth phase and charging tuber phase, were observed. Based on the correlation results, the growth parameters and the yield highly affected to the final outcome of cassava tubers at different growth phases. In the early growth phase, occurs high demand to assimilate with the expense of storage root. However, from the maximum vegetative phase, growth parameters began to show a significant positive contribution to the tuber weight. Weight of fresh tuber in both varieties increased at the charging of tubers phase and thereafter (enlarged bulb). The early growth phase and maximum vegetative phase might not generate a significant contribution to the final yield of cassava tuber. Making those two periods were not suitable time for optimum harvesting result, and it still depended on the variety and its allocation.

Productivity relates to the ability of photosynthesis. Therefore, the process of photosynthesis is important to promote growth, development and yield. There are many varieties of superior and local cassava (Manihot esculenta Crantz) in Indonesia either unknown of their photosynthesis character. The study aims to investigate the characteristics of photosynthesis and influences of physiological parameters associated the activity of photosynthesis in cassava plants. A study was conducted on Inceptisol soils at UGM research at altitude 113 m above mean sea level between January and November 2014. The treatment of single factor is cassava varieties consist of Adira-4, Malang-6, UJ-5, Singgah and Ketan arranged in a randomized block design with three replications. Cuttings size ±20 cm are planted upright with a distance of 1 m × 1 m (population of 10,000 plants ha -1 ). After six months, observation has been done of characters and physiological activities at 10 samples per plots and per varieties. The results showed that there are differences in the density of stomata, stomata aperture width, water content, chlorophyll content and photosynthesis rate between varieties of cassava. Singgah varieties have the Ksd highest with medium Lbs and varieties local of Ketan lowest Ksd. The group of superior varieties of cassava have Kkt medium, but varieties of Malang-6 have Kkt slightly higher and the highest rate of photosynthesis. Singgah varieties have lowest leaves Kkt and medium rate of photosynthesis. Local varieties of Ketan have the highest Kkt and lowest rate of photosynthesis. Group cassava superior varieties had higher photosynthesis rate than the local varieties, local varieties Singgah has a moderate rate and higher than Ketan. Stomata density and the concentration of CO 2 correlated positively and significantly affect the rate of photosynthesis while transpiration increase conductivity stomatal but negatively correlated to the rate of photosynthesis.

Chili Plants (Capsicum annum L.) originating from the tropics and subtropicsAmericas, especially Colombia, South America, and continue to spread to Latin America. Evidence of chili cultivation was first discovered in Peru's historical siteand leftover seeds that are more than 5000 years old BC in a cave in Tehuacan, Mexico. The spread of chili to the whole world including countries in Asia, like Indonesia carried out by Spanish and Portuguese traders. The purpose of this study was to determine the effect of electromagnetic radiation on the growth and yield of red chilies in the city of Tarakan.This research was conducted from September 2018 to January 2019, at the screen house of the Faculty of Agriculture, Borneo Tarakan University. This study was prepared using factorial Randomized Block Design (RBD) with 5 treatments repeated 5 times. The factors studied were large electromagnetic radiation 56 microtesla with exposure time (P0) 0 minutes, (P1) 20 minutes, (P2) 40 minutes, (P3) 60 minutes, (P4) 80 minutes. Observation parameters; plant height, number of leaves, leaf length, leaf width, stem diameter and number of branches. Analysis of variance using variance ANOVA with a confidence level of 95% and if it is significantly different it will be continued with DMRT further testing.The results of the study show that: 1) Observation parameters that showed statistically significant differences were parameters of plant height, number of branches and number of leaves while parameters that did not show different results were parameters of leaf length, leaf width and stem diameter., 2) The best treatment for each observation parameter is P2 treatment (exposure to electromagnetic radiation for 40 minutes), and the lowest treatment is treatment P0 (without exposure to electromagnetic radiation). Suggestions from this study should be carried out further research on the use of electromagnetic radiation in the vegetative phase until the results of red chili plants (Capsicum annum L.)Keywords: chili, electromagnetics radiation, Randomized Block Design  ABSTRAK Tanaman cabai (Capsicum annum L.) berasal dari dunia tropika dan subtropika Benua Amerika, khususnya  Colombia, Amerika Selatan, dan terus menyebar ke Amerika Latin. Bukti budidaya cabai pertama kali ditemukan dalam tapak galian sejarah Peru dan sisaan biji yang telah berumur lebih dari 5000 tahun SM di dalam gua di Tehuacan, Meksiko. Penyebaran cabai ke seluruh dunia termasuk negara-negara di Asia, seperti Indonesia dilakukan oleh pedagang Spanyol dan Portugis. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh radiasi elektromagnetik terhadap pertumbuhan dan hasil tanaman cabai merah di kota Tarakan. Penelitian ini dilaksanakan pada tahun 2018, di screen house Fakultas Pertanian Universitas Borneo Tarakan. Penelitian ini disusun dengan menggunakan Rancangan Acak Kelompok (RAK) faktorial dengan 5 perlakuan diulang sebanyak 5 kali. Faktor yang diteliti yaitu besar radiasi elektromagnetik 56 mikrotesla dengan lama pemaparan (P0) 0 menit, (P1) 20 menit, (P2) 40 menit, (P3) 60 menit, (P4) 80 menit. Parameter pengamatan; tinggi tanaman, jumlah daun, panjang daun, lebar daun, diameter batang dan jumlah cabang. Analisis ragam menggunakan sidik ragam Anova dengan tingkat kepercayaan 95% dan apabila berbeda nyata maka akan dilanjut dengan uji lanjut DMRT. Hasil penelitian menunjukkan bahwa: 1) Parameter pengamatan yang menunjukkan hasil berbeda nyata secara statistik adalah parameter tinggi tanaman, jumlah cabang dan jumlah daun sedangkan parameter yang tidak menunjukkan hasil yang berbeda nayata adalah parameter panjang daun, lebar daun dan diameter batang, 2) Perlakuan terbaik untuk setiap parameter pengamatan adalah perlakuan P2 (pemaparan radiasi elektromagnetik selama 40 menit), dan perlakuan terendah adalah perlakuan P0 (tanpa pemaparan radiasi elektromagnetik). Saran dari penelitian ini sebaiknya dilakukan penelitian lanjutan mengenai penggunaan radiasi elektromagnetik pada fase vegetatif sampai hasil tanaman cabai merah (Capsicum annum L.)Kata kunci : cabai merah, radiasi elektromagnetik, Rancangan Acak Kelompok

The world of agriculture promises development prospects both from the point of view of region, commodity and cultivation technology. The urgency of Agronomy is to recognize, understand the ins and outs of plants, and their breeding activities. Furthermore, food crops, plantations, fruit, vegetables, spices, and even flowers require a proper and adequate technique of propagation of planting material and growing media for plants to grow and develop into production. Modern plant cultivation technology with all its developments has become a practical plant management option such as tabulampot, hydroponics, silviculture and aeroponics also requires knowledge and skills, all of which are summarized and presented in "Basic Agronomy". Books with rich knowledge and benefits for humans and their lives, described in simple and easy-to-understand language, related to the history of agriculture and agronomy, the origin and distribution center of plants, conditions for growth and reproduction, cultivation techniques, harvest and post-harvest, technological developments. cultivation. The existence of this book is expected to answer people's curiosity about the world of agriculture, especially plant cultivation, from the selection of commodities, planting materials and growing media, planting to maintenance and even harvesting and post-harvest handling.

Budidaya tanaman hortikultura di kota Tarakan memiliki peluang besar karena permintaan pasar yang cukup tinggi. Namun usaha ini tidak lepas dari berbagai tantangan. Tantangan  utamanya adalah upaya pengendalian Organisme Pengganggu Tanaman (OPT). Berbagai upaya pengendalian telah dilakukan oleh petani, seperti penggunaan pestisida kimia dan nabati. Solusi lain yang belum banyak diketahui oleh petani adalah penggunaan agens hayati (bakteri atau cendawan). Banyak petani di Kota Tarakan  belum mengetahui perbedaan pestisida nabati dan hayati, maka perlu adanya kegiatan transfer ipteks yang dimiliki oleh Fakultas Pertanian UBT kepada petani di Kota Tarakan. Teknologi yang diberikan kepada petani dalam kegiatan adalah teknik perbanyakan dan teknik aplikasi bakteri indigenous sebagai pestisida hayati serta pembuatan demplot. Setelah pelaksanaan kegiatan ini; 1) petani dapat memanfaatkan mikroorganisme indigenous untuk usaha tani, 2) petani dapat membedakan serangan hama, bakteri patogen, cendawan patogen, dan virus patogen sehingga mampu memilih jenis pestisida yang spesifik, 3) petani dapat membedakan pestisida hayati dengan pestisida lainnya, dan mampu memproduksi pestisida hayati berbasis bakteri fungsional indigenous, 3) petani mengharapkan adanya kegiatan lain sejenis untuk mengatasi berbagai kendala dalam usaha tani, 4) perlu adanya dukungan dan kerjasama dari pihak terkait seperti Dinas Pangan, Pertanian dan Perikanan Kota Tarakan untuk menyelesaikan berbagai permasalahan usaha tani.