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This study aims to evaluate certain tubers of new sweet potato clones for their morphological characters of and yield under low input conditions in the middle highland. This study was conducted at Saree, Aceh Besar, the Province of Aceh (485 m ASL) from February to July 2015. The study used a Completely Randomized Block Design of non-factorial with 12 sweet potato clones consisting of nine clones passed by CIP-SEA Bogor, Indonesia (CIP-LSQ, CIP-1945, CIP-MAN, CIP-513, CIP-BDG, CIP-WHI-5, CIP-W86P, CIP-B9, and CIP-204), one national variety (Antin-1), and two local clones (Orange Saree and Purple Saree). The results showed that there were differences in the characters of 12 sweet potato clones in terms of their tuber shapes, skins and flesh colors. Sweet potato tuber shape being studied consisted of an oval, round and long. Tuber flesh color generally was white, cream, yellow, orange and purple. Meanwhile, CIP-1945, CIP-W86P, Local Orange Saree clones, and Antin-1 variety have orange tuber flesh. CIP-WHI5 clone has the highest number of tubers, while CIP-204 clone has the largest diameter and length of tubers, and the highest in tuber yield.

F. oxysporum, F. proliferatum and F. solani isolates were recovered from root and stem rot of orchid. The isolates were placed into vegetative compatibility group (VCG) based on pairing of complementary mutants. From complementation tests, all F. solani isolates did not form heterokaryons and was therefore heterokaryon self-incompatible. For both F.oxysporum and F. proliferatum isolates, four VCG were identified. The results suggest that variation exist among the F. oxysporum and F. proliferatum isolates from root and stem rot of orchid.

This study was aimed at determining the effect of gibberellin concentration and the interval of Natural Nusantara (NASA) liquid organic fertilizer, as well as their interactions to influence growth and yield of shallots. This study was conducted from April to July 2019 in Experimental Field and Horticulture Laboratory of the Faculty of Agriculture, Universitas Syiah Kuala. The experiment used a Randomized Block Design with a Factorial pattern of 4x3. Gibberellin concentrations were observed at 4 levels (control, 100, 150, and 200 ppm) and the interval of NASA liquid organic fertilizer was observed at 3 levels (controlled, every 7, and 14 days DAP). The results showed that the highest shallot plant was found of 14 DAP, and the largest number of bulbs was found at 100 ppm of gibberellins concentration. The highest of fresh biomass per clump and the largest bulb diameter were found at 150 ppm gibberellins concentration. The growth and yield of the highest shallots were found at the interval of control treatment of NASA liquid organic fertilizer. The highest number of bulbs was found in the combination of gibberellins control with the interval of NASA liquid organic fertilizer every 14 days.

This study aimed to determine the effect of potassium fertilizer doses, Local Microorganism concentrations, and the interaction between the two factors on the growth and yield of shallots. The study applies Randomized Block Design with 3 x 4 Factorial and 3 replications. The observed factors were potassium fertilizer at 3 levels each of control, 100, and 200 kg ha-1 and Local Microorganisms at 4 levels each of 0, 75, 150, and 225 ml L-1). The highest yield potential of the shallots was found at a dose of 100 kg ha-1 potassium fertilizer. The highest diameter of shallot bulbs was initiated at 150 ml L-1 of Local Microorganism concentration, but it was not significantly different from the control treatment. The combination of a potassium fertilizer dose of 200 kg ha-1 and a local liquid microorganism concentration of 75 ml L-1 provide the highest growth and yield of shallots.