Judul: Uji Kolom Tanah Latosol, Podsolik, Dan Regosol Sebagai Objek Simulasi Parit Infiltrasi (Infiltration Trench) Limbah Domestik
Abstrak: Nowadays, domestic waste water has seriously become a potential pollution source of water bodies. The lack of in situ domestic waste water treatment facilities lead to river pollution. One of the technics used to treat domestic waste water is infiltration trench. Infiltration trench filters out the domestic waste water by certain media and infiltrate them through soil body. The objective of the research is to identify the capability of soil in neutralizing some components of the domestic waste water in infiltration trench application. A set of laboratory scale research has been done using a series of soil columns of 30 cm length (top soil and subsoil) and 4 inch diameter. The columns were subjected to a periodic waste water application. Soil adsorption properties were indicated by the vertical flow velocity of the waste water flowing through the soil column and its quality after discharging off the column. Podzolic has a higher capability in adsorping waste water than Latosol or Regosol. It were indicated by the longer time needed by the waste water to pass through Podzolic column. The volume of waste water discharging off the soil column increased since the second week till the end of the research. Nitrogen and phosphate content of the waste water passing through soil column were affected significantly by the type of soil. However the filter media applied on the top of soil column have no effect on nitrogen and phosphate content of the waste water. Nitrogen content decreased respectively up to 63%, 87%, and 75%, after passing through Latosol, Podzolic, and Regosol. And phosphate content decrease up to 99% either after passing through Latosol, Podzolic, or Regosol. Although filter media have no effect on nutrient content of domestic waste water after passing through soil column they tend to have the ability to protect soil surface from being hit by waste water application and tend to make the waste water clearer after passing through soil column.
Keyword: 

Judul: Keragaan Infiltrasi Tanah Latosol pada Beberapa Penggunaan Lahan di DAS Ciujung
Abstrak: Land use is an important aspect in maintaining ecosystem sustainability, particularly in the watershed ecosystem. Land use determines to physical, chemical, and biological characteristics of soil. These soil characteristics influence to the growth of plants and the performances of water infiltration into soil. Infiltration is an essential part of the hydrological cycle that has an important role water availability in the soil. Infiltration process have an important role to the distribution of rainfall and control to runoff, flood, erosion and ground water storage and finally will determines the availability of river discharge in dry season. The aims of this research is to assess the performance of soil infiltration in various land use in Ciujung watershed. The study was conducted on three land use types that included plantative forest (HT), dense mixed garden (KCR), and less-dense mixed garden (KCTR). The field observation was done by using the Double Ring infiltrometer method, while the the analysis of the physical and chemical and other soil characteristics were done in the Laboratory of Soil and Water Conservation, Department of Soil Science and Land Resources, Faculty of Agriculture. The results of this research showed that the infiltration rate is strongly influenced by land use. Infiltration rate is the highest and most stable on HT land use, followed by KCR and KCTR. Constant infiltration rate at HT and KCR is belonging to quickly class, while at KCTR is relatively moderate to fast. The magnitude of the rate constant infiltration in HT (23.4 cm h-1) is higher than KCR (13.2 cm h-1) and KCTR (6.0 cm h-1). The high rate infiltration of the soil on the land use of HT support it able to accommodate as much water (6.45 dm3) that higher than at KCR (3,66 dm3) and at KCTR (1.52 dm3). Infiltration rate is influenced by pores with large size (PDSC), while the volume of water infiltration is more influenced by the total porosity of the soil. Besides it is influenced by land use, soil infiltration in the study area is also determined by the physical and chemical characteristic of the soil organic matter, bulk density, total porosity, aggregate stability, macro pores, very fast drainage pore (PDSC), and soil texture.
Keyword: Bogor Agricultural University (IPB), infiltration volume., physical and chemical characterstics of soil, land use, Infiltration rate

Judul: The Anatomy of the skull of Kalimantan Orangutan (Pongo pygmaeus pygmaeus)
Abstrak: Penelitian ini bertujuan untuk mempelajari anatomi tengkorak orangutan Kalimantan (Pongo pygmaeus pygmaeus) jantan yang dikaitkan dengan fungsi unsur-unsur di kepala dan perilaku kesehariannya. Penelitian ini dilakukan dengan cara mengkaji ciri-ciri anatomi tengkorak orangutan dan membandingkannya dengan literatur tengkorak manusia dan hewan yang memiliki kedekatan taksonomi dan anatomi dengannya, yaitu gorilla dan simpanse serta dengan tengkorak hewan lain. Hasil penelitian menunjukkan beberapa karakteristik tengkorak orangutan yang diamati, diantaranya sutura yang tidak terlihat jelas dan diduga tengkorak ini berasal dari orangutan yang sudah berumur tua. Disamping itu, juga terdapat krista yang sangat berkembang pada daerah calvaria tengkorak, yaitu crista frontalis, crista sagittalis externa, dan crista nuchae. Crista frontalis diduga sebagai tempat pertautan cheek pad yang sangat berkembang pada orangutan jantan, crista sagittalis externa diduga sebagai tempat pertautan m. temporale dan crista nuchae diduga sebagai tempat pertautan otot-otot ekstensor leher dan kepala. Selain itu, arcus zygomaticus yang sangat kuat dan berkembang, dibentuk oleh processus zygomaticus dari os temporale dan processus temporale dari os zygomaticus. Bagian tengkorak yang paling berkembang pada orangutan adalah pars splanchnocranii yang terlihat pada daerah mulut yang menonjol dan panjang. Formula gigi dari hewan ini adalah 2 (I 2/2, C 1/1, P 2/2, M 3/3) dengan dentes canini yang terlihat sangat berkembang dan merupakan ciri sexual dimorphism-nya.
Keyword: