Judul: Penerapan teknik konservasi tanah dan pengelolaan bahan organik serta hara fosfor untuk meningkatkan produktivitas tanah ultisol
Abstrak: Low productivity of Ultisol is caused by some limiting factors, such as nutrient and organic matter content mainly low to very low, high concentration of Aluminum exchangable, pH <5.0. In addition, heavy erosion can drift soil nutrients and organic materials, hence, fertilizing becomes no longer effective and efficient. In order to increase it productivity, efforts are needed in terms of preventing soils nutrients looses and increasing the availability of phosphorus nutrient in the soil. The objectives of this research was to evaluate the application of soil conservation technique, soil organic matter and phosphorous management to increase Ultisol productivity. The research was conducted in Tulang Bawang District, Lampung. The soils used are from the fine textured of Acid Volcanic materials. Research was designed 9 treatments, which are P0: control; P1: no soil conservation technique + SP-36/season; P2: Stylosantes goyanensis strip + SP-36/season; P3: Flemingia congesta hedgerows + SP-36/season; P4: no soil conservation technique + SP-36 + organic matter; P5: no soil conservation technique + rock phosphate; P6: Stylosantes goyanensis strip + rock phosphate; P7: Flemingia congesta hedgerow + rock phosphate; P8: no soil conservation technique + rock phosphate + organic matter. The research results showed the technology package which gave no significant influence to some physical and chemical characteristics of the soils, as well as soil nutrients looses in overland flow. The result also showed the technology gave no significant influence to concentration of sediment and nutrient content. But, the soil conservation techniques can reduce sediment and nutrient losses by the Flemingia congesta and Stylosantes goyanensis hedgerows. However, the results also performed the significant influence of the technology package on crops (maize and cassava) growth and production. The techology package of SP-36 fertilizer application gave higher on corps growth and production than control and tecnology package of Rock Phosphate apllication.
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Judul: Amelioration of Compost and Coal Ash on an Ultisol of Pineapple Plantation: Temporal Dynamics of Soil Chemical Properties
Abstrak: Kendala utama sifat kimia Ultisols untuk pertanian meliputi rendahnya pH, bahan organik, KTK, dan ketersediaan hara. Penelitian ini bertujuan mengevaluasi dinamika temporal sifat kimia tanah pada 0, 2, 6, 9, dan 10 bulan setelah ameliorasi (BSA) kompos dan abu batu bara (FABA) pada Ultisol di lahan perkebunan nanas. Penelitian terdiri dari percobaan lapang dan percobaan perkolasi di rumah kaca dengan RAL, keduanya terdiri dari 6 taraf perlakuan yaitu kontrol, kompos 50 ton/ha (KT 50), Kompos+FABA 50 ton/ha (KFT 50), KFA 25, KFA 15, dan KFA 5, T= tebar dan A=alur. Selain amelioran ini, tanah juga dipupuk lengkap. Analisis dengan metode rutin dilakukan terhadap sifat-sifat kimia tanah lapisan 0-20 cm pada 0 dan 2 BSA dari percobaan lapang, pada 9 dan 10 BSA dari percobaan perkolasi, dan pada 6 BSA berdasarkan ekstrapolasi. Perlakuan berpengaruh sangat nyata. Secara umum, sifat-sifat kimia tanah terbaik diperoleh pada perlakuan KFA 25. Kadar hara semakin turun dengan waktu akibat proses pencucian. Pada perlakuan terbaik 10 BSA, kadar C-organik, N-total dan KTK tanah lebih tinggi dari kadar awal meskipun masih tergolong rendah, sedangkan P-tersedia juga lebih tinggi dari kadar awal dan tetap tergolong sangat tinggi. Namun, kadar K-dd, Cadd, dan Mg-dd lebih rendah dari kadar awal dan tetap tergolong sangat rendah. Untuk mempertahankan produktivitas tanaman, maka disarankan untuk memberikan pupuk N dan K serta ameliorasi kompos dan FABA pada 10 BSA., The main chemical constraints of Ultisols for agriculture include low soil pH, organic matter, CEC, and nutrients availability. This study aims to evaluate temporal dynamics of soil chemical properties at 0, 2, 6, 9, and 10 months after amelioration (MAA) of compost and coal ash (FABA) on an Ultisol of pineapple plantation. The study consisted of field and greenhouse percolation experiments, both with CRD consisting of control, 50 ton/ha compost (CB 50), 50 tons/ha compost+FABA (CFB 50), CFR 25, CFR 15, and CFR 5 treatment levels, where B = broadcast and R = row application. Besides, the soil was completely fertilized. Chemical analyses were done using routine methods on soil samples of 0-20 cm layer at 0 and 2, 9 and 10, and 6 MAA, respectively from the field experiment, from the percolation experiment, and based on extrapolation. The treatment’s effects were very significant. In general, the best results were obtained at CFR 25 treatment level. The nutrient status decreased with time due to leaching processes. From the best treatment at 10 MAA, compared to the corresponding initial status, soil organic-C, total-N, and CEC were higher than, although still classified as low, whilst P-availability was also higher than, but still classified as very high. However, the soil exchangeable-K, -Ca, and -Mg were lower than the initial levels and still classified as very low. To maintain plant productivity, it is suggested to apply supplementary N and K fertilizers and compost and FABA ameliorants at 10 MMA.
Keyword: ameliorant, broadcast, leaching, percolation, row

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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