Judul: Metode Survei Kayu Rakyat Berhrkan Beberap Karakteristiknya : Studi Kasus di Kabupaten Bogor
Abstrak: Data and information either having high validity or high reliability are still limited. This is might due to the difficulty to obtain the data and cost reason. The difficulty to survey the private forest is affected by several of the following factors, i.e. small size of private forest, spreadly distributed and converted easily to another land use. To overcome those dificuties, it is important find out a survey method that can be accurately estimate the private forest condition and potency. Survey methods examined in this research include social-economics and biophysic-based method, image-based method using Normalized Dtflerence Vegetation Index (NDVI), and method based on integration of basic data and image. Correlation test were performed for all private forest variables. Then stratification was established based on the selected factors. A method is recognized as accurate if it has low coefficient of mean variation, this describes a homogenity strata, and high in coefficient of variation of among strata, showed each strata has specific value that different with the other ones. Maximum difference between coeficient of mean variation and coefficient of variation of among strata was investigation. The result showed that basic data method has higher accuracy than another to method in which dominant variables are rural density and listance to city.
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Judul: Karakteristik, potensi dan kontribusi hutan rakyat di wilayah Kabupaten Bogor
Abstrak: Private forest is kind of wood agriculture which do in dry land. Private forest bocome the source for wood industry material, especially on Java area. Private forest now was comercially by the peasant and become the alternative for their income. Simply peasants management becomes the threat for forest suistainability. The objective of this study was to identified the characteristic of private forest agriculture, and to calculate the potential of trees proprierity. Furthermore, the private forests income contribution for peasents finance have also been calculated. This study was conducted by description and corellation analysis. Correlation analysis was using between dry land area and trees proprierity and also private forest income variable. The results shows private forest were held by polyculture and agroforestry system by Sengon (Falcataria moluccana (Miq.) Berneby & Grimes) trees own the highest potential with 562 trees/ha. Peasants in Stratum III (dry land area >0.5 ha) has the highest trees proprierity with 1300 trees/person. Private forests contributing until 10 % from peasants total income. Dry land area has positive correlation with the trees proprierity significant at the 0.01 level and has positive correlation with private forests income significant at the 0.05 level.
Keyword: Bogor Agricultural University (IPB), correlation, forest income, trees proprierity, dry land, Private forest

Judul: Peranan unsur kalsium serta hubungannya dengan " demam susu" pada sapi perah
Abstrak: Demam susu atau "parturient paresis" adalah penyakit yang secara primer sering menyerang sapi perah yang tengah atau baru saja melahirkan anaknya. Penyakit ini merupakan suatu bentuk kekacauan metabolisme kalsium. Dalam hal ini hewan-hewan penderita adalah sapi-sapi perah yang tak mampu memenuhi tuntutan tubuhnya ter hadap kebutuhan akan kalsium yang begitu memuncak pada awal masa laktasi. Sapi-sapi perah yang rentan umumnya sudah mengalami masa laktasi 3 4 kali. Ditambah dengan adanya faktor predisposisi, yaitu metabolisme tulang yang makin melambat karena hewan bertambah tua dan penyerapan kalsium dari makanan yang terganggu. Kadar kalsium plasma hewan pada saat itu jauh dibawah kadar normalnya, dan hal itu akan mengakibatkan serangkaian gejala klinis penyakit yang khas. Karena kalsium berperan antara lain pada kontraksi urat daging/otot dan pada pemindahan impuls saraf, maka menurunnya kadar mineral ini dalam darah (hipokalsemia) akan menimbulkan gangguan saraf dan Hipokalsemia yang disertai dengan hipomagnesemia akan menimbulkan gejala tetani. Sedang pada hewan dengan kadar magnesium dalam darah normal atau sedikit lebih tinggi (hipermagnesemia relatif) gejala tetani akibat hipokalsemia akan segera diikuti dengan adanya kelemahan otot (relaksasi otot). Hipokalsemia yang dibiarkan berlarut-larut akan menimbulkan kematian hewan ternak karena peranan unsur kalsium yang demikian penting dalam tubuh. Pencegahan demam susu ditempuh dengan cara pengaturan pakan yang baik, yaitu dengan menghindari masukan kalsium berlebihan terutama pada masa kering kandang dan kadar fosfor(P) yang cukup sesuai kebutuhan.
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