Judul: Efektivitas Teknik Perbanyakan Fungi Mikoriza Arbuskula dari Spora Tunggal dengan Tanaman Centrosema pubescens dan Pueraria javanica.
Abstrak: Limited availability of forage was caused by few constraints, like dry season, limited land, low productivity of forage, and cultivation management which is not optimal. Arbuscular Mycorrhizal Fungi (AMF) is one of microorganism that can be used to solve that problems. AMF needs host plant for its growth. This research aimed to evaluate the efectivity of multiply technique from a single spore by host plant Centrosema pubescens and Pueraria javanica. The treatment of this research is the difference kind of AMF that being used to roots inoculation. P1= Gigaspora margarita, P2= Acaulospora tuberculata, P3= Glomus etinucatum. Parameters in this research are percentage of growth plants, succeded infection precentage, the amount of spores and root infection. Result shows that the most effective AMF from single spore are Acaulospora tuberculata and Glomus etinucatum with the host plant Centrosema pubescens. Pueraria javanica only effective to growth of Acaulospora tuberculata.
Keyword: Pueraria javanica, AMF, Arbuscular Mycorrhizal Fungi, biofertilizer, Centrosema pubescens, forage availabity

Judul: Efektivitas Fungi Mikoriza Arbuskula (FMA) dalam Memperbaiki Produktivitas Rumput Gajah (Pennisetum purpureum Schum.) Berdasarkan Periode Pemanenan
Abstrak: The use of arbuscular mycorrhizal fungi (AMF) was expected to be an alternative environmentally friendly technology and efficiency of fertilizer to increase the productivity of forage. This study was aimed to determine the level of production of elephant grass (Pennisetum purpureum Schum.) inoculated by AMF and fertilizer dose reduction based on different harvesting period. This research used Completely Randomized Factorial Design with 2 treatments and 3 replications. The first treatment was fertilizer: P0 (control), P1 (100% fertilizer dose), and P2 (50% fertilizer dose and inoculated by AMF). The second factor was the interval of harvest H30 (30th day of harvest), H50 (50th day of harvest, and H60 (60th day of harvest). Variables measured were plant height increment of each week, the production of dry weight on the first harvesting period, the production of dry weight on second harvesting period, and percent of infection AMF. It can be concluded that the P2H60 treatment with 10 grams of AMF inoculation and fertilizer dose 50% (SP36 75 kg/ha, KCl 75 kg/ha, manure 2 ton/ha, and urea 100 kg/ha) on 60th day of harvest elephant grass get the best production, either the first and second periods and more effective and efficient use of fertilizer.
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Judul: Frekuensi Orang Kidal Usia 6-21 Tahun di Setu Babakan, DKI Jakarta.
Abstrak: Handedness didefinisikan sebagai preferensi seseorang dalam penggunaan salah satu tangan, baik kanan maupun kiri, secara lebih dominan untuk melakukan berbagai kegiatan sehari-hari dengan lebih tepat. Handedness dipengaruhi oleh faktor genetik, perkembangan, dan budaya. Orang dengan preferensi tangan kiri biasa disebut dengan kidal. Frekuensi orang kidal selalu lebih rendah dibandingkan orang yang tidak kidal. Terdapat sekitar 10% dari total populasi di dunia yang kidal. Tujuan penelitian ini adalah mempelajari handedness serta menentukan frekuensi orang kidal di Setu Babakan, DKI Jakarta dengan survei kuesioner. Subjek penelitian ini merupakan pria dan wanita yang tinggal di Setu Babakan, DKI Jakarta dengan rentang usia 6-21 tahun. Frekuensi orang kidal di Setu Babakan adalah 4.1%. Frekuensi orang kidal lebih tinggi ditemukan pada pria dibandingkan dengan wanita. Frekuensi orang kidal cenderung menurun pada kelompok usia yang lebih tua. Hal tersebut mengindikasikan tekanan budaya, sosial, dan lingkungan yang memengaruhi handedness.
Keyword: betawi, handedness, kidal