{"id":787,"date":"2026-05-28T06:34:54","date_gmt":"2026-05-28T06:34:54","guid":{"rendered":"https:\/\/rock-crusher-tractor.com\/?p=787"},"modified":"2026-05-28T06:34:54","modified_gmt":"2026-05-28T06:34:54","slug":"korean-garlic-stone-clearing-thor-2-4-gyeongnam-gangwon","status":"publish","type":"post","link":"https:\/\/rock-crusher-tractor.com\/hi\/korean-garlic-stone-clearing-thor-2-4-gyeongnam-gangwon\/","title":{"rendered":"\u0915\u094b\u0930\u093f\u092f\u093e \u092e\u0947\u0902 \u0932\u0939\u0938\u0941\u0928 \u0915\u093e \u0909\u0924\u094d\u092a\u093e\u0926\u0928 \u0914\u0930 \u092a\u0924\u094d\u0925\u0930 \u0915\u0940 \u0938\u092b\u093e\u0908 \u2014 \u0917\u094d\u092f\u094b\u0902\u0917\u0928\u093e\u092e \u0914\u0930 \u0917\u0902\u0917\u0935\u0949\u0928 \u0915\u0947 \u0932\u0939\u0938\u0941\u0928 \u0915\u0947 \u0916\u0947\u0924\u094b\u0902 \u0915\u0947 \u0932\u093f\u090f THOR 2.4"},"content":{"rendered":"
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\u0915\u094b\u0930\u093f\u092f\u093e \u092e\u0947\u0902 \u0932\u0939\u0938\u0941\u0928 \u0915\u093e \u0909\u0924\u094d\u092a\u093e\u0926\u0928 \u0914\u0930 \u092a\u0924\u094d\u0925\u0930 \u0915\u0940 \u0938\u092b\u093e\u0908 \u2014 \u0917\u094d\u092f\u094b\u0902\u0917\u0928\u093e\u092e \u0914\u0930 \u0917\u0902\u0917\u0935\u0949\u0928 \u0915\u0947 \u0932\u0939\u0938\u0941\u0928 \u0915\u0947 \u0916\u0947\u0924\u094b\u0902 \u0915\u0947 \u0932\u093f\u090f THOR 2.4<\/h1>\n

Korean garlic is planted in September\u2013October and harvested in May\u2013June \u2014 the opposite calendar to highland potato. The stone management requirements are different but no less stringent: a stone-contact garlic bulb is unsellable on the premium dried garlic market.<\/p>\n

Garlic Field Stone Clearing Enquiry<\/a><\/p>\n<\/div>\n<\/div>\n

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Korean garlic is one of the country’s most commercially significant agricultural products \u2014 it is a dietary staple, a medicinal crop, and a major export commodity. The two principal production regions are Gyeongnam (South Gyeongsang Province, producing the Namdo variety) and Gangwon-do and North Gyeongsang (producing the Uiseong and other varieties). Both regions grow garlic on granite-derived or mixed parent-material soils that present stone management challenges \u2014 and garlic bulb skin is as sensitive to stone-contact damage as highland potato skin, for the same market reason: the premium Korean dried garlic market grades on outer skin integrity, and any stone-contact abrasion on the bulb wrapper skin eliminates the premium dried garlic classification.<\/p>\n

This article covers the Korean garlic stone clearing system from the farm operator’s perspective: why garlic shares the same zero-tolerance stone sensitivity as highland potato, how the garlic calendar (September\u2013October planting) differs from the potato system in terms of stone management timing, the THOR 2.4 depth setting appropriate for garlic, the EP-EW-4000’s role in pre-harvest spring maintenance, Korean garlic variety characteristics, and how the stone management investment in garlic fields integrates with the broader farm rotation that may also include highland potato, radish, or cabbage.<\/p>\n

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Why Garlic Shares Potato-Level Stone Sensitivity \u2014 The Bulb Skin Damage Market Mechanism<\/h2>\n

\"THOR<\/p>\n

Korean garlic bulb quality grading is based on three criteria: bulb size, shape uniformity, and outer skin (wrapper leaf) integrity. The wrapper leaves \u2014 the dry, papery layers surrounding the cloves \u2014 are the visual quality indicator that buyers examine first. Wrapper leaf damage from stone-contact abrasion during mechanical harvest is categorically different from wrapper leaf damage from disease (white rot, botrytis) \u2014 stone damage is a mechanical failure that the wrapper cannot heal or conceal, while disease damage has a characteristic visual pattern that is separately classified. Both cause grade loss, but stone damage is entirely preventable through pre-planting clearance.<\/p>\n

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Premium dried garlic (Uiseong-brand, Namdo-brand):<\/span><\/p>\n

Korean premium dried garlic commands significant price premiums (50\u2013150% above commodity garlic) based on geographic origin and quality certification. The certification requires: intact outer wrapper (no stone-contact tears or abrasions), minimum bulb diameter by variety standard, and uniform clove fill. Stone-contact damage that produces even a single wrapper tear \u2014 regardless of the underlying clove quality \u2014 eliminates the bulb from premium dried garlic classification. The economic cost of a 15% stone-damage downgrade from premium to commodity on a 1 ha garlic field at peak Korean premium garlic pricing can exceed 3,000,000\u20135,000,000 KRW per hectare of revenue loss.<\/p>\n<\/div>\n

Harvest timing sensitivity \u2014 different from potato:<\/span><\/p>\n

Korean garlic is harvested in late May\u2013June when the field is dry and the bulbs have completed their development. Harvest involves lifting the bulbs from the soil, which in stone-present fields means bulbs rolling against stone fragments on the harvester share and web \u2014 producing the same stone-contact abrasion mechanism as potato. The key difference from potato: garlic bulbs are often harvested by machine-assisted lifting followed by manual laying and field drying (in-field drying for 2\u20133 days) before collection. During the field drying period, stone-damaged bulbs (with compromised wrapper integrity) deteriorate faster than intact bulbs, compounding the grade loss.<\/p>\n<\/div>\n<\/div>\n

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Korean Garlic Varieties \u2014 Namdo and Uiseong Stone Management Implications<\/h2>\n

The two principal Korean garlic variety types have different growing season lengths and different bulb development depths \u2014 both affecting the appropriate THOR 2.4 clearance depth for each:<\/p>\n

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Namdo ()<\/p>\n

Soft-neck, Gyeongnam coastal and southern regions<\/p>\n