Judul: Analisis Pola Agroforestri Tradisional di Distrik Kokas Kabupaten Fakfak Propinsi Papua Barat
Abstrak: One method of cultivating the forest in Fakfak Regency is the practice of traditional agroforesty system known as garden system. The garden managemen It is based on the existing local knowledge and was produced to substance needs. It is necessary to study the management and the benefits from this agroforestry garden. This study was conducted in one month, on May 2012, and located in the province of West Papua, Fakfak Regency, Kokas District. Targeting farmers who have gardens (traditional agroforestri). Respondets interviewed were as many as 37 people in two villages, namely the villages of Kiriwas-was and Kinam. The respondents in each village were selected by a purposive sampling method. The data were collected from secondary data as well by interview and observation. The data were processed and analyzed with a method of reduction, presentation, and conclusion. The gardens owned by the respondents came from natural forests, which were then opened and made into gardens. Natural forests are opened and divided among the clans; and the respondents‟ gardens were in general inherited property (land). Garden cultivation is divided into several simple (traditional) activities such as land preparation, seed preparation, planting, maintenance, and harvesting. The results of the field study showed that the most common planting pattern (agroforestri) was the combination of wood, fruits and plantation crops. The crops selected were the types that do not require too much care, attention, and of local mainstay for example, nutmeg (Pala). These garden gave so many contribution to farmers income. It can be seen from the average contribution to the total income from the farmers garden, that is equal to 53,5%. The problem faced by the average farmers from the three tribes is the intrusion of animals such as wild boar, deer and other forest animals.
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Judul: Analisis pola agroforestri tradisional di Distrik Kokas Kabupaten Fakfak Propinsi Papua Barat
Abstrak: Penelitian ini dilaksanakan selama satu bulan yaitu, pada bulan Mei 2012 di Distrik Kokas, Kabupaten Fakfak, Propinsi Papua Barat. Responden yang diwawancara sebanyak 37 orang dari dua Desa yaitu Desa Kiriwas-was dan Desa Kinam. Pemilihan responden pada tiap desa contoh dilakukan dengan cara purposive, dengan sasaran para petani yang memiliki kebun agroforestri tradisional. Metode pengumpulan data dengan teknik wawancara, observasi, dan pengumpulan data sekunder. Pengolahan dan analisis data dilakukan dengan cara reduksi, penyajian data, dan penarikan kesimpulan. Kebun yang dimiliki oleh responden berasal dari hutan alam yang kemudian dibuka dan dijadikan kebun. Hutan alam yang dibuka dibagi berdasarkan marga dan pada umumnya kebun yang dimiliki responden merupakan harta warisan (tanah milik). Pengelolaan kebun terbagi atas kegiatan persiapan lahan, persiapan bibit, penanaman, pemeliharaan, dan pemanenan yang masih bersifat sederhana. Pola tanam kebun adalah pola dengan kombinasi antara kayu, buah-buahan, dan tanaman pertanian. Tanaman yang dipilih merupakan jenis yang tidak terlalu banyak membutuhkan perawatan, perhatian khusus, dan merupakan jenis andalan setempat seperti pohon pala. Kebun memberikan kontribusi yang besar terhadap pendapatan petani. Hal ini dapat dilihat dari rata-rata kontribusi kebun terhadap pendapatan total petani yaitu sebesar 53,5%. Kendala pengelolaan yang dihadapi oleh petani umumnya adalah adanya gangguan binatang liar seperti babi hutan, rusa, dan binatang hutan lainnya.
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Traditional agroforestri, Local knowledge, Garden, Contribution of income

Judul: Sintesis layered double  hydroxide (LDH) dan aplikasinya sebagai adsorben kromium heksavalen (Cr(VI))
Abstrak: Layered double hydroxide (LDH) merupakan material hidrotalsit yang dapat berperan sebagai adsorben ion Cr(VI) melalui mekanisme tukar anion, adsorpsi-reduksi, dan interaksi elektrostatik. LDH MgAl dan MgAlFe disintesis menggunakan metode kopresipitasi dengan rasio molar M2+:M3+ sebesar 9:4,5. Hasil difraktogram XRD LDH MgAlFe menunjukkan terbentuknya fase hidrotalsit dengan puncak basal d003 mengalami pergeseran ke daerah 2θ yang lebih besar dibandingkan LDH MgAl, hal ini menandakan berkurangnya ukuran spesi basal dari LDH MgAlFe. Studi skala laboratorium dilakukan dalam mengkaji dosis dan profil isoterm adsorpsi dari LDH sebagai adsorben Cr(VI) yang dilakukan pada pH 4. Aplikasi LDH sebagai adsorben ion Cr(VI) menggunakan dosis optimum 12,5 mg/mL. Profil adsorpsi LDH MgAl mengikuti model isoterm Langmuir dan memiliki nilai kapasitas adsorpsi maksimum (Qm) sebesar 45,95 mg.g-1, sedangkan profil adsorpsi LDH MgAlFe mengikuti model isoterm Freundlich dan memiliki nilai kapasitas adsorpsi maksimum (Qm) sebesar 37,54 mg.g-1. Hasil adsorpsi menunjukkan bahwa LDH MgAl dan MgAlFe dapat berfungsi sebagai adsorben potensial dalam penanganan limbah ion Cr(VI)., Layered double hydroxide (LDH) is a hydrotalcite material that can serve as a Cr(VI) adsorbent through anion exchange, adsorption-reduction, and electrostatic interaction mechanisms. LDH of MgAl and MgAlFe materials were synthesized using the coprecipitation method with a M2+:M3+ molar ratio of 9:4,5. The results of the XRD diffractogram of LDH MgAlFe showed the formation of a hydrotalcite phase with a basal peak of d003 shifting to an area 2θ larger than that of LDH MgAl, which indicated a reduction in the basal spacing of LDH MgAlFe. A laboratory study was conducted to examine the dose and profile of the adsorption isotherm of LDH as Cr(VI) adsorbent at pH 4.The LDH can adsorb Cr(VI) at the optimum dose of 12.5 mg/mL. The LDH MgAl adsorption profile followed the Langmuir model has a maximum adsorption capacity (Qm) value of 45.95 mg.g-1. The MgAlFe LDH adsorption profile followed the Freundlich model has a maximum adsorption capacity (Qm) value of 37.54 mg.g-1. The adsorption results show that LDH MgAl and MgAlFe can function as promising adsorbents for treating Cr(VI) waste.
Keyword: isoterm adsorpsi, kromium heksavalen, layered double hydroxide, limbah ion logam