. Chemical weed-control equipment. Weeds; Spraying; Spraying equipment. bows and nipples are used to bring the boom outlet to the proper direction for the nozzles. The outlets may be in a single row, or may be in two rows with alternate nozzles on opposite sides of the boom. This is an advantage when double- coverage application is used. Each row of nozzles is tilted slightly toward the other to give different angles of attack. NOTE: After any welding has been done, remove the scale and cover the metal with a coat of metal priming paint. Nozzle spacing on the boom depends upon the type of crop
. Chemical weed-control equipment. Weeds; Spraying; Spraying equipment. bows and nipples are used to bring the boom outlet to the proper direction for the nozzles. The outlets may be in a single row, or may be in two rows with alternate nozzles on opposite sides of the boom. This is an advantage when double- coverage application is used. Each row of nozzles is tilted slightly toward the other to give different angles of attack. NOTE: After any welding has been done, remove the scale and cover the metal with a coat of metal priming paint. Nozzle spacing on the boom depends upon the type of crop to be sprayed. For row crops, the usual arrangement is one nozzle directly over each row, with the boom height adjusted so that the spray fans meet between rows. Where crops in rows are too far ad- vanced to permit spraying of the foliage, nozzles may be spaced to center between rows. The fans will meet at the base of the rows without wetting the crop plants. For open-field work, such as grain and alfalfa spraying, nozzle spacing should be uniform. Since the boom must be kept as low as possible for all applications, short spacings (12 to 18 inches) are used for double coverage or for very low- volume spraying because low-volume noz- zles produce narrow fans at low pressures. Wider spacings (18 to 24 inches) are used with wide fan nozzles (80° to 100°) for medium to high discharge and pres- sure or for single coverage. Since outlets for the nozzles are welded into the boom, it may be necessary to have extra ones welded in for specific row or bed widths. These may be plugged when other widths are required. Several manufacturers are using hose connections between nozzles, or to the nozzles from the boom, to carry the spray liquid. Spe- cial nozzle holders which clamp on the boom may be moved for adjustable spac- ing. This system is particularly adaptable to rows and beds where plantings are on different widths. NOZZLE SPACING H A-HEIGHT FOR SINGLE COVERAGE B-HEIGHT FOR DOUBLE C
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Keywords: ., bookcentury1900, bookpubli, booksubjectspraying, booksubjectweeds
