Judul: Pertumbuhan dan Produksi Indigofera zollingeriana Miq. pada Media Tumbuh yang Ditambahkan Cacing Tanah dan Pupuk Guano
Abstrak: Indigofera zollingeriana Miq. adalah salah satu jenis leguminosa yang memiliki kandungan nutrient cukup tinggi. Cacing Eisenia foetida dan Lumbricus rubellus memiliki kemampuan untuk meningkatkan kesuburan tanah. Pupuk guano dapat merangsang pertumbuhan akar dan batang, serta meningkatkan efisiensi nitrogen. Tujuan dari penelitian ini yaitu mengevaluasi pemberian cacing tanah (Eisenia foetida dan Lumbricus rubellus) dan pupuk guano terhadap produksi dan pertumbuhan Indigofera zollingeriana Miq. Rancangan perobaan yang digunakan yaitu Rancangan Acak Lengkap (RAL) dengan pola faktorial (2 jenis cacing tanah dan pemberian pupuk guano). Faktor perlakuan cacing diantaranya yaitu tanpa cacing, 100% of L. rubellus, 100% of E. foetida, 50% E. foetida dan 50% L.rubellus. Sedangkan perlakuan pupuk guano yaitu tanpa dan dengan pemberian pupuk guano. Parameter yang diamati yaitu tinggi tanaman, jumlah cabang, produksi biomassa tanaman, berat kering tanaman, jumlah nodul, kandungan nutrient (Protein kasar, Fosfor, Kalium) dan populasi cacing. Data dianalisis menggunakan sidik ragam (ANOVA), apabila terdapat hasil yang berbeda nyata, dilakukan uji lanjut Duncan Multiple Range Test (DMRT). Pemberian cacing tanah baik E. foetida maupun L. rubellus dan perlakuan pupuk guano tidak berdampak pada parameter pertumbuhan dan produksi biomassa Indigofera zollingeriana Miq., Indigofera zollingeriana Miq. is a legume plant that have the potential high nutrient. Eisenia foetida and Lumbricus rubellus earthworm has a capability to improve soil fertility. Guano fertilizer could stimulating root and shoot, and increasing efficiency of Nitrogen. The purpose of this study was to evaluate the effect of earthworms E.foetida, L. rubellus and Guano fertilizer combination on productivity and quality of Indigofera zollingeriana Miq. This study used factorial completely randomized design consisting of two factors namely earthworm use and guano fertilizer levels. Treatment factor earthworms (without earthworms, 100% of L.rubellus, 100% of E. foetida, combination 50% E. foetida and 50 % L.rubellus), and treatment factor consisted of Guano fertilizer (without and with guano fertilizer addition). Data were analyzed by analysis of variance (ANOVA). The significant differences among treatment were examined using Duncan Multiply Range Test (DMRT). Parameters observed in this experiment were plant height, number of leaves, analysis of plant productivity, number of root nodules, crude protein (CP), phosphorus (P), potassium (K) content of plant. The conclusion of this research, the addition of both earthworms (E. foetida and L. rubellus) and guano fertilizer did not affect the parameter of growth and biomass production of Indigofera zollingeriana Miq.
Keyword: Eisenia foetida, Indigofera zollingeriana Miq., Lumbricus rubellus, Eisenia foetida, guano fertilizer

Judul: Kualitas Vermikompos Lumbricus rubellus dari Kotoran  Sapi Perah dan Domba serta Aplikasinya pada  Pembibitan Indigofera zollingeriana
Abstrak: Produktivitas tanaman Indigofera zollingeriana dipengaruhi oleh kesuburan lahan. Penggunaan pupuk vermikompos dapat mendukung hal tersebut karena memiliki kandungan hara yang tinggi. Selain itu bisa meminimalkan penggunaan pupuk buatan yang penggunaannya dalam jangka panjang akan berdampak negatif terhadap kesehatan tanah sekaligus mengatasi permasalahan limbah peternakan. Penelitian ini bertujuan mengevaluasi kualitas vermikompos dari cacing Lumbricus rubellus dengan menggunakan pakan cacing berupa kotoran sapi perah dan domba serta aplikasinya pada pertumbuhan pembibitan tanaman Indigofera zollingeriana. Penelitian ini menggunakan (RAL) dengan perlakuan M0 = kontrol, M1 = vermikompos sapi perah 25% + tanah 75%, M2 = vermikompos domba 25% + tanah 75%, M3 = vermikompos sapi perah 12,5% + vermikompos domba 12,5% + tanah 75%. Data dianalisis menggunakan sidik ragam (ANOVA) dan uji lanjut (DMRT). Hasil penelitian menunjukkan perlakuan M2, M3 dan M1 lebih baik dibandingkan dengan M0. Penggunaan vermikompos nyata berbeda lebih tinggi dibandingkan dengan perlakuan kontrol terhadap parameter tinggi tanaman, jumlah daun, jumlah tangkai, dan diameter batang., The productivity of Indigofera zollingeriana is influenced by soil fertility. The use of vermicompost fertilizer can support this because it has a high nutrient content. In addition, it can minimize the use of artificial fertilizers whose use in the long term will have a negative impact on soil health as well as overcome the problem of livestock waste. This study aimed to evaluate the quality of vermicompost from Lumbricus rubellus worm by using worm feed in the form of cow and sheep dung and its application to the growth of Indigofera zollingeriana plant nurseries. This study used a (CRD) with treatments M0 = control, M1 = dairy cow vermicompost 25% + soil 75%, M2 = sheep vermicompost 25% + soil 75%, M3 = dairy cow vermicompost 12.5% + sheep vermicompost 12.5% + soil 75 %. analyzed using (ANOVA) and further testing (DMRT). The results showed that the treatment of M2, M3 and M1 was better than that of M0. The use of vermicompost was significantly higher than the control treatment on the parameters of plant height, number of leaves, number of stalks, and stem diameter.
Keyword: Growth, Indigofera zollingeriana, livestock waste, Lumbricus rubellus, vermicompost

Judul: Penyelesaian Masalah Rotasi Aliran Fluida Kental Von Karman Menggunakan Metode Homotopi
Abstrak: Von Karman equation is an equation that describes fluid viscous flow induced by infinite disk rotation. By assuming steady flow and laminar, viscous incompressible fluid flow is represented in Von Karman equation by an angular velocity and the vertical direction velocity as the independent variables. Von Karman equation is a nonlinear problem that is solved using the homotopy method. The use of homotopy method is done by defining an homotopy function that requires auxiliary parameters to control the convergent region of the solution. The solution is a recursive formula with given initial conditions. Using software based-functional shows that velocity components converge to a value.
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