<p>Tomato (Lycopersicum esculentum Mill) is one of horticulture commodities with high economic value and still need seriously handling especially for increasing fruits quality and quantity. However the production of tomato has not fullfilleed the demand yet. Therefore it is necessary to develop production. On lowland, the issue not only high temperature but also availability of water is unpredictable.This study aimed to investigate the effect of irrigation frequency on the growth of Mutiara, Opal, and Gondol tomato variety. This research was conducted at the Greenhouse Laboratory of the Agriculture Faculty, Sebelas Maret University with attitude 95 m asl. Implementation of the research conducted from January to May 2013. This research used completely randomized factorial design with two factors, namely variety of tomato (Gondol, Opal and Mutiara) and watering frequencies (everyday, once in 3 days, once in 6 days, and once in 9 days). The results showed that plant height, number of leaves and number of branches are influenced by the variety of tomato and irrigation frequency, whereas chorophyl content is influenced by the watering frequency. Growth component and chlorophyll content of tomato decreased with increasing irrigation frequency.</p>

Effect of Various Yeasts Antagonists on Anthracnose Disease and the Shelf Life of MangoPostharvest decay on mango may occur due to physiological damage and/or postharvest disease especially anthracnose. This postharvest decay may decrease the quality of mango fruit. The use of antagonists yeast as biocontrol agent is an alternative control measure for postharvest diseases of fruits. This study aimed to screen yeast species as biological control agents and in the same time delaying the maturity of fruits to extend its shelf life.  Six isolates of yeasts were evaluated, namely Cryptococcus albidus, Cryptococcus terreus, Aureobasidium pullulans, Rhodotorula minuta, Candida tropicalis, Pseoudozyma hubeiensis); fungicides treatment using azoksistrobin was applied for comparative treatment. The study was conducted at two temperature conditions, namely room temperature and 15 ° C. It was evidenced that C. albidus, A. pullulans, and C. tropicalis were effective to control anthracnose disease on mango under both temperatures.  Furthermore, C. tropicalis and A. pullulans were able to extend manggo shelf life for 21 days at room temperature and for 54 days at 15 °C, respectively.

Quality soybean seeds are one of the essential factors to support soybean production. One of the obstacles in providing quality soybean seeds was the physiological quality of soybean seeds declined speedily during storage, especially in open storage. This study aimed to evaluate the physiological quality of yellow soybean seeds during a six-month storage period. This research was carried out from October 2020 to March 2021 in the seed analysis laboratory of the Seed Technology Study Program, Lampung State Polytechnic. The study used a Split-Plot Completely Randomized Design (CRD) with four replications. The main plot was the seed storage period which consists of seven levels, specifically 0, 1, 2, 3, 4, 5, and 6 months. Sub-plots were soybean variety which consists of two levels, specifically  Dega variety and Deja variety. The results of the study indicated that (1) Deja variety had higher physiological quality than Dega variety based on germination, vigor index, growth speed, growth, maximum growth potential, and seed moisture content during the six-month storage period (2) Deja variety had longer storability than Dega variety in open storage.Keywords: Soybean, Physiological quality, Open storage.

Lettuce is one of the most popular vegetables from various groups, because it does not need special preparation to enjoy it immediately. Its cultivation is relatively easy and does not require special techniques, making lettuce can be grown in polybags or hydroponically. Rice washing water, which is usually not utilized, actually has the potential as liquid organic fertilizer. Besides being practical and environmentally friendly, liquid organic fertilizer can be applied easily. This study aims to determine the effect of the appropriate application time interval for giving rice washing water on the growth and yield of lettuce. This research was conducted in August-October 2020 using polybags containing soil: manure: husk (1: 1: 1). The design used was a single factor completely randomized block design (RAKL). The factor is the application time interval for giving rice washing water with 4 levels, namely: W0 = without giving rice washing water (control), W1 = once every 2 days, W2 = once every 4 days and W3 = once every 6 days with a dose of 50 ml polybag-1. The results showed that the time interval treatment with washing rice water had no significant effect on plant height, number of leaves, diameter, fresh root weight, and total fresh weight of lettuce plants. However, the treatment of giving rice washing water at an interval of 6 days (W3) once showed a better value than without treatment, the time interval for giving rice washing water once every 2 days or 4 days.

Salah satu cara untuk memperbaiki sifat fisika, kimia, dan biologi tanah yaitu dengan penerapan sistem pertanian organik yang memanfaatkan bahan-bahan alami yang tersedia di alam. Salah satu solusi yang dapat diterapkan yaitu dengan menggunakan biofertilizer sebagai alternatif untuk mengganti penggunaan pupuk anorganik. Penelitian ini bertujuan untuk: 1) mempelajari respon produksi tiga kultivar bunga kol yang dibudidayakan secara organik akibat aplikasi biofertilizer, 2) mempelajari konsentrasi biofertilizer yang terbaik dalam meningkatkan produksi bunga kol, 3) mempelajari interaksi antara kultivar dan konsentrasi biofertilizer terhadap produksi bunga kol. Penelitian ini dilaksanakan di Politeknik Negeri Lampung dari Juni sampai November 2021. Percobaan disusun secara faktorial dalam Rancangan Acak Kelompok (RAK) dengan ulangan 3 kali. Faktor pertama yaitu 3 kultivar bunga kol yang terdiri atas Diamond 40, PM 126, dan Snow white. Faktor kedua yaitu level konsentrasi biofertilizer dengan 4 taraf yang terdiri atas 0%, 25%, 50%, dan 75%. Homogenitas data diuji dengan Uji Barlette, dan aditivitas data dengan Uji Tukey, kemudian dialkuakan analisis sidik ragam, dan dilanjutkan dengan uji Beda Nyata Terkecil (BNT) pada taraf 5%. Hasil penelitian menunjukkan bahwa 1) aplikasi biofertilizer nyata meningkatkan bobot dan diameter bunga tanaman kembang kol; 2) dosis terbaik yang menghasilkan produksi tertinggi yaitu konsentrasi 25 %; dan 3) Kultivar Snow White direkomendasikan untuk dibudidayakan secara organik.