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Cultivation of the golden teak (Tectona grandis L.) requires the planting hole size and appropriate use of manure. The size of planting hole provides plant growth, so that the plant can grow with optimum and appropriate use of manure to provide nutrients for the plants.. The aims of the study was to obtain an interaction between planting hole size and manure on vegetative growth phase of golden teak. Treatments tested in this study were with 4 treatment of planting hole size as the first factor and 3 levels of manure as the second factor. The twelve treatments were arranged in a factorial randomized block desiagn with three replicates. Variable measured plant height, number of leaves, and the flush changes to mature. The results showed that there were no interactions between the planting hole size and goat manure on early vegetative growth of golden teak plants. The planting hole size treatment showed significant effects on some variables height of plant, number of leaves and flush change to mature leaves. Manure treatment showed no significant effect for all variables. The observation variables that showed no significant differences height of plant, number of leaves and flush change to mature leaves.

Sweetpotato weevil Cylas formicarius Fabricius is major obstacle in increasing of sweet potato production in various countries. Tuber damage due to C. formicarius causes yield loss up to 80%. This study aims to examine the integration control of C. formicarius in entisol, each control combination was composed of various components. The control integration was composed of various components of synthetic insecticide, application of entomopathogenic fungus Beauveria bassiana, weeding, turning of the stems, heap up, and cover mounds using plastic mulch. The study used a randomized block design, each treatment was repeated five times. The research was conducted at Kendalpayak experimental station from May to September 2017. The result showed that P5 with B. bassiana application five times, addition of 3 t/ha organic fertilizer, cover mounds by plastic mulch was most effective in suppressing of C. formicarius in endemic entisol. The tuber weight at control combination (P5) was reached 23 t/ha or 56% higher than control combination of farmer cultivation (P1) was only 10 t/ha. The entisol land with an alluvial structure cracks easily during in the dry season, so that adults to penetrate the base of tubers and lay their eggs. The results of this study indicate that control combination of P5 can be recommended as a innovation control technology of C. formicarius in endemic entisol.

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Biological agents such as rhizosphere bacteria and Vesicular Arbuscular Mycorrhiza (VAM) are potential agents to improve soil qualities. In addition, species and varieties of crops give different response to the shading related to their growth and development. The research aimed to determine the effect of biofertilizer application under different levels of shading conditions on the growth and capsaicin content of Capsicum frutescens L. and evaluate the suitable levels of shading. The research was conducted from February to June 2019 at Universitas Brawijaya. Bhaskara variety was chosen in this research. Thirteen treatments and three replications were arranged in the randomized design with nest pattern (Nested). The treatments were a combination between the shading level and biofertilizers. The dry weight, nutrient content, fresh weight and capsaicin content were observed. The results showed the application of biofertilizers consisted of PGPR and VAM consortium, under the lowest shading condition (25%) increased the total dry weight of chili, the nutrients absorption, and the capsaicin content. The capsaicin content is influenced by the fruit weight of chili and plant nitrogen uptake. Biofertilizers and the lowest shading conditions contribute to supporting the growth and development of chili pepper.