On a large coconut plantation planted on a deep peat soil in Sumatra, Indonesia, hybrid coconut yields are stabilizing at values well below their potential, even in plots where known production factors have been mastered since the outset: land preparation, water control, and mineral fertilization. To explain this situation, five hypotheses have been proposed. They were tested one by one in field trials. The authors have demonstrated that the main reason for stabilized yields was the Lepidoptera root pest Sufetula spp. and conclude by considering lines of research for controlling this pest in the context of rehabilitation and replanting.

The use of the edge detection method in an image will produce the edges of the image object. The goal is to mark the part that becomes the image’s detail and fix the point of the blurred vision, which occurs because of an error or the effect of the image acquisition process. This study aims to see the combination of the Prewitt and Canny methods in detecting the edges of the inverted image. The image dataset used is a bonsai image consisting of 10 typical images, and ten bonsai images reversed based on the standard image dataset. The research dataset was obtained from the Caltech 101 website http://www.vision.caltech.edu/Image_Datasets/Caltech101/ with an image size of approximately 200×300 pixels. Based on the analysis of 10 experiments that have been carried out, the combination of the Prewitt and Canny methods can perform edge detection quite well with an average accuracy of 78.90% and an error rate of 21.10%. Thus it can be concluded that these methods combine to yield a reasonable level of precision, though the extent is very limited.

Tujuan penelitian adalah untuk mengetahui pengaruh dan interaksi pemberian pupuk organik daun kelor dan pupuk kotoran puyuh terhadap pertumbuhan dan produksi tanaman kacang panjang (Vigna cylindrica L). Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) faktorial dengan dua faktor yang diujikan sekaligus dan mempunyai 3 ulangan, Faktor pertama adalah pemberian Pupuk cair daun kelor (K) yaitu : K 1 = 200 ml/l air/plot, K2 = 300 ml/l air/plot dan K3 = 400 ml/l air/plot. Faktor kedua pemberian dosis pupuk kandang puyuh (P) terdiri dari 4 taraf yaitu :P 0 = 0 (kontrol), P1 = 1 kg/plot, P2 (2 kg/plot) dan P3 (3 kg/plot).Parameter yang diamati terdiri dari pertumbuhan panjang tanaman (cm), jumlah cabang produktif, jumlah polong/sampel, produksi polong/sampel dan produksi buah/plot. Berdasarkan analisa DMRT diperoleh bahwa penggunaan pemberian pupuk cair daun kelor dan pupuk kandang puyuh memberikan pengaruh yang berbeda sangat nyata (p < 0.01) terhadap panjang tanaman, produksi/sampel dan produksi/plot, akan tetapi tidak berbeda nyata (p > 0.05) terhadap jumlah cabang produktif dan jumlah polong/sampel. Tidak ada interaksi atara pemberian pupupk organik daun kelor dan kotoran puyuh terhadap pertumbuhan dan produksi tanaman kacang panjang (Vigna cylindrica L).   The purpose of the study was to determine the effect and interaction of the use of Moringa leaf organic fertilizer and quail manure fertilizer on the growth and production of long bean plants (Vigna cylindrica L). This study used factorial Randomized Block Design (RBD) with two factors tested at once and had 3 replications. The first factor was the administration of Moringa leaf liquid fertilizer (K), namely: K 1 = 200 ml/l water/plot, K2 = 300 ml/l water/plot and K3 = 400 ml/l water/plot. The second factor was giving quail manure doses (P) consisting of 4 levels, namely: P 0 = 0 (control), P1 = 1 kg / plot, P2 (2 kg / plot) and P3 (3 kg / plot). Parameters observed consisted of growth in plant length (cm), number of productive branches, number of pods/samples, pod sample production and fruit/plot production. Based on DMRT analysis, it was found that the use of Moringa leaf liquid fertilizer and quail manure gave a very significant effect (p <0.01) on plant length, production/sample, and production/plot, but not significantly different (p> 0.05) on the amount productive branch and number of pods/samples. There was no interaction between the administration of organic Moringa leaves and quail feces to the growth and production of long bean plants (Vigna cylindrica L).

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The specific target in this activity was to introduce fermentation and silage methodology to improve the quality of animal feed to Mekar Baru stock farmers cooperatives in Labuhan Batu Regency. Seminars and discussions were conducted as parts of the community service which then followed up by direct practice about animal feed fermentation and silage. The results of the mentioned activities included seminars, discussion, and fodder. In conclusion, the technology of animal feed processing is in a high favorand needed by people in the village, especially beef cattle farmers whose livestock was only given green animal feed all this time.