The cultivation of red onion is currently most ISAN Nakhon Ratchasima, buriram, Srisaket include is the second northern uttaradit, Chiang Mai, Chiang Rai, lamphun, and include: There are also widely planted at Ratchaburi. Kanchanaburi and Nakhon Pathom. Varieties of shallot grown popular is a native species of the North. The North called the Columbian bua is a shallot with the outer bark, Curcumin, moderately rounded head size 1 split in 2-3 cloves, mild odor, sweet arrangement between growth and without seeds. When planting, 1 head to tillers, approximately 5-8 head head head full rein in the age when the winter rainy season and 45-day 90-day yields approximately 2000-3000 kilograms per Rai depending on planting and care, but the quality isn't very good, because the retention percentage of dry rot and atrophy damaged up to 60% Another species, some red onion พันธ์ุคือ onion or red onion that has be the outer shell, purple, red, thick and leathery shell contamination, size large, consistent head-head rounded on 1 head, 1-2 cloves smell pungent with a sweet arrangement between growth will create flowers and seeds, which are constantly reviewing and decidedly left, otherwise small head size, and number of little heads. In General, when the planting of 1 head to head, tillers, approximately 8-10 head to head down slowly than tillers and fragrant little bua. The age when full sanction head in winter, 100 days and rainy 45-day yield varies according to season, planting and maintaining yields approximately 1000-5000 kilograms per Rai quality to maintain a better aroma bua. Because the root system is shallow like shallots with loose soil. With well-drained soil preparation of scarifying or plow cultivator is digging with a shovel flip soil sunlight before 2-3 days, and then the sub soil, small lump but not much, because it will make the soil tightly and added hard head. To enter a manure compost or manure fertilizer down to the soil mix range to loosen soil. Keep debris, weeds or grass roots until all the other before planting with manure for onion varieties that will be planted, farmers are prepared in advance, at least two months because of the onions to use planting will have breaks are for an extended period, but will not be stored for longer than 6 months, because this fragrance is light green peaks from the clutches of tangy, started conservative, then remove the onion varieties come to trim cleaning. Cut to trim the roots and dried leaves old discarded completely. If there is a weak amount, will be dropped. 1 in 10 in order to accelerate the proliferation sensitivity when taking down plantings. In the land 1 Rai will use approximately 200 kg of onion varieties commonly grown 1-1.5 meter width is the length of the converted according to facilitate operations and planted in rows 15-20 cm spacings or 8-20 cm. Before planting, watering, planting until the soil moisture conversion ahead bring onion varieties planted into scones or converted by removing the part that used to be the old root out poke into the soil about half my head gently so as not to bruise the stem or tumor, or root sprouts so they are not slow. When planting, across will be covered with straw or Hay, or husk, thick enough to retain moisture and control weeds, watering, then green onions germinate out within 7-10 business days if the head does not germinate will transplant repair immediately. After 14 days, enter a manure by sprinkling distance approximately 7 cm after fertilizing the water until moist, the whole conversion, cultivated. If planted in the winter season will yield 2-3 times as much as in the rainy season, so this is why red onion are priced higher in the rainy winter season .... Read more at: http://www.dailynews.co.th/agriculture/532499
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