Variety Nasik Red was used for the study. Why the difference? Onions: 4″ – 6″ (10-15 cm.) Onion seeds can be sown close together, and thinned out once the seedlings have grown. The weed biomasses as mulch enhanced the soil moisture retention and The treatments were consisting six rates of N fertilizer (0, 46, 69, 92, 115, 138 kg ha-1) and four levels of intra-row spacing (7.5, 10, 12.5 and 15 cm). Narrow spacing of 10 cm in onion plants smothered weeds number per unit area whereas wider spacing of 15 and 20 cm gave room to the emerging weeds helped increase the density and composition of the infesting weeds (Ara et al., 2007). [4] Singh (1995) conducted two trials at Ranchi with plant spacing, nitrogen rate and phosphorus rate to study the response of onion. However, the greater the yield potential, the lower the expected price. It can perform three functions at a time viz. When you start your onions seeds, the goal is to get them to germinate and growth just enough for them to get strong enough to transplant. Generally, for kharif season, seedlings are transplanted on flat beds at a spacing of 15 x 10 cm while for rabi crop spacing of 10 x 10 cm is adopted. The same principle applies in short-day areas. You can also buy onion plants from your local gardening center and start with this step first. The experiment was designed in RCBD with three replications. Onion sets are small bulbs of immature onions. Sets, or small immature onions, should be spaced like onion plants. There are a number of horizontal spacing macros for LaTeX: \, inserts a .16667em space in text mode, or \thinmuskip (equivalent to 3mu) in math mode; there's an equivalent \thinspace macro; \! In Bangladesh transplanted in the main field on 4 April 2011 by onion cultivation is mainly limited in winter season maintaining 20×10 cm spacing. So medium within row spacing (10 cm) could be recommended for high onion seed yield (data not shown) and quality in the Northern State, Sudan and areas of … Bulb size and plant spacing are the two key factors in producing quality of onion seeds (Mirshekari and Mobasher, 2006). If planting in double rows with a Stanhay planter, use a distance of 4 to 5 cm between the rows and 30 to 35 cm between the centres of adjacent double rows. No thinning will be needed If you require pencil-thin scallions. For large bulb sizes the spacing should be 15cm (6"). As we processed thousands of tons a year, we had to do in-depth trial work to establish the correct onion planting dates and spacing for the benefit of all concerned. There was no significant difference between plants grown at 10 and 13 cm intra-row spacing. Total weight of the onions in four rows (kg) = 40 × 100 = 4.00 kg. Planting your onions further apart also makes it easier for you to control weeds. Allow 12 to 18 inches between rows or space onions 6 to 8 inches apart in all directions in beds. Thin to 10 cm spacing’s for large bulbs, 5 cm spacing’s for smaller bulbs but higher yields, or 3 cm spacing’s for scallions. Remove weeds that may compete for light and/or moisture. In contrast, the Southern Cape growers would sow their seedbeds in May/ June and harvest in about January. Narrow spacing of 10 cm in onion plants smothered weeds number per unit area whereas wider spacing of 15 and 20 cm gave room to the emerging weeds helped increase the density and composition of the infesting weeds (Ara et al., 2007). This gives a density (ignoring pathways) of nearly three million plants per hectare. Because it’s easier to get larger yields in November, the markets will usually be amply supplied and the law of supply and demand will prevail. If you are using one large container for your seeds, sprinkle them evenly over compost. Green onions are harvested before their bulbs can mature. Thin Autumn sown onion seedlings to about 2.5cm (1 inch) in the autumn - make sure all thinnings are removed (they may be used as spring onions) to prevent Onion Fly attack. Plant Spacing Guide. Spring onions should be … But this is only partially true with onions. You could plant in January/February to mature into autumn or sow in April/May to mature into November. There is a good reason for this difference in plant population rates. Plant spring onions 1.5 cm deep in single rows 15 to 20 cm apart, using a hand-pushed or air seeder. Space the plants 4 to 5 inches apart in the row to produce large-sized bulbs (closer spacing significantly decreases bulb size) or space 2 to 2 _ inches apart and harvest every other plant as a green onion. Once the seedlings have sprouted, you can pick and choose from the ones that are healthiest and have the best chance of producing a good crop. Space your seedlings 3–4 in (7.6–10.2 cm) apart. Generally, for kharif season, seedlings are transplanted on flat beds at a spacing of 15 x 10 cm while for rabi crop spacing of 10 x 10 cm is adopted. Though they’re still on the small side compared to the onions you’re likely to find in the grocery store. Use your judgment and give these varieties of onion more space. Don’t go too deep! Onion plant spacing is a function of your intended size — the closer together, the smaller the bulbs will be. Hardening off your seedlings will help them adapt to outdoor conditions. Dig holes in your garden about 1 in (2.5 cm) deep, and place your onion seedlings inside. It is a good idea to spread onions out around your garden instead of confining them to one spot. To perfect your spacing, run some trials, at least on a small scale, to determine how close you can get the plants without sacrificing optimum size. According to the National Gardening Association, spreading out your onions around your garden, rather than keeping them all in one section, can reduce the spread of any diseases, should they occur. Planting Time Sowing should take place before end March so that plants can be transplanted out into the fields in May and June. Sets, or small immature onions, should be spaced like onion plants. On the basis of over all results, 22x9.5 cm inter and intra row spacing showed good performance and is therefore, considered best for onion cultivation in the agro-climatic conditions of Dargai, Malakand agency. This stops the sap from flowing to the stems and diverts the plant’s energy into maturing the bulb. Each row contains 10 onions. Onion sets should be planted so that the tip is still visible above the soil. He found that the closest spacing gave higher number of marketable bulbs and yields. Different onions might grow better with more spacing, for example, varieties of giant onion. 7.5 cm apart, for pearl onions spacing would be reduced to 2.5 cm in the row and the large bulb size is promoted by spacing 10 cm or more. As with sets, place four plants in each planting hole, and space each bunch of four onions about 6 inches (15 cm) apart. Bulblets with 2-2.5 cm diameter are ideal for planting. The experiment was laid out in a randomized block design with factorial concept. To focus your time and effort on only the healthiest plants, start your seeds or sets in a container first. Most of the growth took place in relatively cool conditions in a very short-day length area. The farmer could plant the early crop at 400 000 plants/ha and the later one at 600 000 to 800 000 plants/ha due to day length and heat units. This is one of the easiest ways to start onion seeds. 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