Judul: Karakteristik Fisik Tanah pada Sistem Pengolahan Tanah Konservasi (Studi Kasus: Kebun Percobaan Cikabayan, Bogor)
Abstrak: Continuous growth of population, leads to continuous increase of food and water need. This situation requires continuous increase of food production is inevitable. One attempt to increase agricultural production is by doing soil intensive tillage (IT). However, in the long term, intensive soil tillage willreduce soil quality. Therefore, a good soil tillage that can maintain land productivity is neccessary, one of which is soil conservation tillage (CT). Nevertheless, how faris this tillage system better than intensive soil tillage system still debatable until now. This research aims to identify and compare the influence of continuous soil conservation tillage and soil intensive tillage practiced for ± 15 years on soil physical properties.The parameters observedinclude C-organic, aggregate stability, field moisture content, soil water movement, soil macroorganisme, and soil macroporosity.The results show that the soil with conservations tillage (CT) has better quality of soil physical properties than soil with intensive tillage (IT). It is shown by higher soil organic matter in CT (3.05%) than that in IT (2.50%), higher aggregate stability in CT (24.44%) than that in IT (20.24), higher total macroorganisme in CT than that in IT, higher available water in CT than that in IT, and higher distributes macroporosity total in CT (28.56%) than that in IT (12.95%).
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Judul: Karakteristik sifat fisik dan hidrologi tanah pada berbagai penggunaan lahan: studi kasus di desa cimulang, kecamatan rancabungur, kabupaten Bogor, provinsi Jawa Barat
Abstrak: The increasing population has caused increasing pressure over land utilization that has lead to more conversion of forest land into agriculture land (dry farm and plantation). This land conversion degrades land quality as indicated by decreasing quality of soil physical properties, decreasing of water infiltration, and increasing of runoff. A research to study soil physical and hydrology characteristics on mixed farm, oil palm plantations, and dry farm was carried out in Cimulang village, Rancabungur District, Bogor Regency. The study was conducted on different slope, i.e. 0-5%, 5-8% and 8-15% in the same soil type. Parameters observed in this study were infiltration capacity, hydraulic conductivity, bulk density, porosity, pore drainage, and soil ability to hold water (fiels capacity, available water, and fiels water content). Measurements of bulk density, porosity, pore drainage, and the ability of soil to hold water are done in the laboratory using undisturbed soil samples. Meanwhile, the measurements of infiltration and hydraulic conductivity were done in the field. The result shows that dry farm has the lowest quality of soil physical and hydrology as indicated by the highest bulk density and low porosity, macro pores, infiltration, and hydraulic conductivity. Land of oil palm has lower quality of soil physical than mixed farms. The quality of soil physical in mixed farms is better due to greater amount of plant residue and unintensive soil management that makes the land remains protected with minimum soil damage. The above result proved that the main factor affecting the soil physical properties and hydrology are the intensity of soil management, the quantity and quality of plant residue and organic material.
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Judul: Infeksi Cacing Jantung Dirofilaria Immitis, Railliet & Henry, 1911 Pada Anjing
Abstrak: Cacing Dirofilaria immitis dewasa yang tinggal dalm ventrikel kanan jantung anjing, sering kali menimbulkan gejala klinis yang cukup berat. Cacing Tersebut menghasilkan mikrofilaria yang selanjutnya berkembang menjadi larva infektif dalam saluran malphigi induk semang entara, yaitu nyamuk dari genus Culex, Aedes dan Anopheles.
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