Judul: Release of fixed potassium by adding oxalic acid and cations to increase available potassium for plant growth on smectitic soils
Abstrak: Research aimed to study the role of oxalic acid, Na+, NH4+, and Fe3+ in increasing available K in smectitic soils for maize (Zea mays, L.) were conducted in Laboratory of Soil Science, Kyoto University, Laboratory of Research and Soil Test, and Green House of Indonesian Soil Research Institute, Bogor. The experiments used 91 of composite soil samples taken from Java that represented Inceptisols, Vertisols, as well as Alfisols. Four bulk soil samples taken from Jonggol, Bogor (Typic Hapludalfs), Sidareja, Cilacap (Chromic Endoaquerts), Padas, Ngawi (Typic Endoaquerts), and Todanan, Blora (Typic Haplustalfs) were also used in the experiments. The results showed that most of K in the smectitic soils was in non-exchangeable form, thus it was not available for plant growth immediately.
Keyword: smectitic soils, composite soil, bulk soil, non-exchangeable form, soil buffering capacity, maximum sorption

Judul: Korelasi Ekstrak Kalium Tanah Ultisol dan Oksisol dengan Respons Tanaman Jagung
Abstrak: Ultisol and Oxisol are two kinds of soil that have widcly distribution in Indonesia, which is potential to the developed in crop agriculture like C0111. Low level of potassium nced fertilized that appropriate with thc plants demand. The selected extraction method to measure the potassium needed were detennined through the correlation test between the concentration of potassium soil and the plants response. This expcriment were conducted in Ultisol and Oxisol soil Balambangan Pagar, Lampung Utara to select the best extraction method of potassium soil for corn. The experiment used five status potassium levels, that is very low (OX), low ('1,X), medium (VoX), high Oc.X), very high (X), which X = 631,68 mg KCllpot or equivalent with 1287,32 kg Kel/ha, that is the potassium demand to reach the very high potassium content. Each POk1ssium levels was fertilized with 0, 40, 80, 160, 320 mg KCllpot. Respectively plants response were correlated with the potassium soil that estimated by five method, HCI 25%, Olsen, Morgan Wolf, Morgan Vanema, and NH4-asetic pH 7,0. The result showed that fertilization of K significantly increased the plants only in very low level ofpotassiulll soil as 19,8% in Ultisol and 28,6% in Oxisol. For the increasing height weight of dry pbnts was 1,87-27,27% in Ultisol and 0,26-18,74% in Oxisol. The capability of each method in determining the potassium in soil could be different. Hel 25%, Olsen, Morgan Wolf, Morgan Vancma, dan NH.l-asclic pH 7,0 method were selected to estimate K fertilizer needed in Ultisol for corn,and in Oxisol soil was Olsen and NH4-asetic pH 7,0 method.
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Judul: Infeksi Virus Parainfluenza Pada Anjing
Abstrak: Virus parainfluenza anjing termasuk famili Paramyxoviridae, berbentuk pleomorf dengan ukuran bervariasi (bergaris tengah antara 100-500 nm), berpembungkus peka ether, berisi genom RNA dan secara serologis mempunyai kesamaan dengan virus SV-5 kera; dikenak sebagai salah satu kausa penting dari sindrom "kennel cough". Infeksinya dapat mengenai anjing semua umur yang belum pernah terinfeksi atau mendapatkan vaksinasi mengakibatkan gejala klinis ringan yang terbatas pada traktus respirasi atu infeksi yang secara klinis tidak memperlihatkan gejala nyata. Gejala klinis yang nampak setelah masa inkubasi (1-5 hari) terlewati berupa batuk yang tidak berat selama beberapa hari, berbagai tingkat tonsilitis dan pharyngitis dan kadang-kadang ditemukan kenaikan temperatur rektal antara 1-2 derajat C dari temperatur normal rat-rata. Anjing terinfeksi mengandung virus pada traktus respirasi bagian atas dan bawah serta limfonoduli sampai hari ke 9 setelah infeksi. Penyebaran virus antar anjing terjadi secara aerogen.
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