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The objectives of this work were to a) determine vermicompost effect on bulbifica- tion dynamics in terms of garlic (Allium sativum L.) bulb dry weight and sucrose metabolism and b) evaluate the impact of vermicompost on garlic bulb yield and quality. The treatments were soil (control) and 1 soil : 1 vermicompost (by volume). The use of vermicompost as a substrate caused early bulbing (18 to 20 days) and lengthened bulb filling period. Bulb filling period corresponded to an increase in the total soluble carbohydrates and a later modification in nonstructural carbohydrate distribution patterns regarding fructan (scoro- dose) metabolism. The vermicompost treatment increased scorodose accumulation, which was directly related to the harvest index, resulting in greater yield and bulb quality. Bulb quality was not modified in terms of bulb pungency and soluble solids content by the use of vermicompost. In the current agronomical context, the use of solid agricultural waste (vermicompost) in garlic production constitutes a valid alternative, though the physiological and/or agronomical implications of such use are unknown. Arguello et al., (1997) determined the critical period for fertilizing garlic may be between the initiation of shoot growth and the beginning of bulb fill- ing. In particular, previous work on traditional fertilization, such as urea on garlic, show the fertilization advances the onset of bulbifica- tion by 5 to 6 d, which favorably lengthens the period of bulb filling, increases the bulb's dry weight by 10%, and increases yield and quality (Ledesma et al., 2000). Vermicompost effect on dry weight, bulbing, yield and quality of garlic bulbs is not known. The use of vermicompost on onions in- creased growth and yield from 2.72 g/plant to 38.05 g/plant (Thanunathan et al., 1997). In other vegetables, such as cucumber and lettuce, add- ing 20% of pig manure vermicompost increased the aboveground dry weight of seedlings as compared to the traditional commercial crop medium (Atiyeh et al., 2000). In tomatoes, add- ing 20% of pig manure vermicompost resulted in a 12.4% increase in fruit weight; and adding between 20% and 40% of this compost increased commercial fruit size (Atiyeh et al., 2001). Let- tuce seedlings treated with a 50% NutriLomb (Allium sativum L.) clove seeds taken from the second and third fertile leaves of bulbs sown in the Villa Dolores area (Province of Cordoba, Argentina) were used in this study. The experiment was conducted at the Fac-

Vermicompost Effects on Bulbing Dynamics, Nonstructural Carbohydrate Content, Yield, and Quality of `Rosado Paraguayo' Garlic Bulbs