Cold tolerance LEXINGTON, Ky. - Research and field experience indicate that rating the cold tolerance of com hybrids could “open the door” for growers using no-till or reduced tillage fanning methods. “With the trend toward no-till methods and- the universal ac ceptance of early planting as a key to top com profits, growers need a means of ‘pushing back’ the 1 beginning of file planting season,” comments Kenneth Wells, University of Kentucky extension agronomist. “It’s „ particularly important for large-acreage growers to allow seeding some fields extremely early,” he adds. York Co. DHIA (Continued from Page 020) 3 5-1 305 24,963 3 4-8 '305 24,191 3 4-2 305 23,916 3 4-4 305 24.776 3 3-0 305 19,248 3 2-2 305 16,834 3 2-6 305 17.082 3 2-3 304 15.139 3 2-6 305 18,020 3 2-3 301 14,357 462 468 481 490 137 181 185 187 190 192 William Ruppert Jennie Top Melody Glow Red Donna 9983 Eisenhart Bros 257 300 301 327 Wayne b. Myers Linda Fiti “In tests where University of Kentucky plant scientists measured soil temperatures under no-till conditions, two features were constant,” Wells continued. First, soil in no-tilled fields is usually 2 degrees to 4 degrees cooler than conventionally tilled soil. Second, there is much less temperature fluctuation during a 24-hour period than there is in soil that is not “insulated” with crop residues. Thus, the seed is exposed to stress for longer periods during the day under notill conditions. Those, test results correspond with measurements made at com research centers where cold tolerance ratings are made on 14,446 23,172 18,523 17,736 21,769 19,859 17,756 278 305 305 305 305 305 305 10- 11- 9-11 7-2 7-7 3-3 2-0 5-0 3-1 3-1 2-3 18,777 15,068 14,551 14,364 305 305 305 305 21,674 17,764 305 305 4-1 1-11 For a healthy, highly productive herd, FLORIN Enriched Dairy Feeds are scientifically formulated, tested and proven. Feed it regularly, and see the results...more milk from cows, more money for you. 665 824 623 707 837 587 633 34 35 3.7 3.8 635 521 537 541 46 3 7 991 662 WHATEVER HERD YOU HAVE □ HOLSTEIN □ AYRSHIRE □ GUERNSEY □ JERSEY FEED FLORIN DAIRY FEEDS TO YOUR HERD TO MAKE MILK AND MONEY WOLGEMUTH BROS, INC. MOUNT JOY, PA PH; 717-653-1451 rating helps no-till corn Northrop King Co. hybrids, ac cording to Matt Shubat, NK com technical services manager. The cold tolerance rating is a combined measurement of rate of emergence, percentage of emergence at 30 days after planting, and total dry weight of the plant approximately 42 days after planting. “The data pinpoints a need for hybrids with the genetic potential to germinate under colder, wetter soil conditions and grow normally after seedling emergence,” Shubat continues. The concern on the part of growers and others to conserve soil, save fuel, and reduce com paction has already encouraged one-third of all U.S. com farmers to try reduced tillage on some of their acreage, according to a survey conducted for NK in 1981. “We got tired of watching our dollars blow away in the dust,” is how George McDonald, 1981 Tennessee NCGA champ, explains his decision to try no-till. “We have sloping fields ranging from 2% to 7%, so water erosion is also a problem.” Last year McDonald, who was named one of our 1981 FFA Regional Star Farmers for the U.S., no-tilled 145 acres of com into fescue or orchardgrass stubble. He also minimum tilled 55 acres of com in rotation with wheat and soybeans. Planting extended from March 14 to March 23. “Soil temperature on the 14th was 52 degrees, but there was con siderable fluctuation in tem peratures during the planting Lancaster Fanning, Saturday, December 11,1982—D21 period,” McDonald says “We believe in cold tolerance ratings," he says. “We test plot several varieties to determine seedling vigor and try to select those, such as NK’s PX74, which combines at least medium cold tolerance with other traits necessary for top yields. “Growing top com can’t be pinned down to any one thing we do, but we have learned that if growth of the plant ever slows down, it will affect your final yield,” McDonald states. Murray Corriher, China Grove, North Carolina, has four NCGA championship tropies that also came from fields of no-tilled PX74. He also likes to combine cold tolerance rating with a hybrid’s yield potential so he can start planting by April 1. “Around here, it’s likely that soil temperature will be as high as 60 degrees when the sun is high, but it will get a lot colder than that later in the day,” Corriher comments. Foam marker aids no-till NORTHBROOK, 11. - A foam components, cab mounted control marking system designed panel and a gallon tank with a specifically for the farmer has just built in sparging tube that been introduced by Precision produces thick, rich roam Laboratories, Inc. Called enough for a full days planting, "Trailblazer The Farmer’s Special boots form '‘blobs” of foam Foamer”, the unit is easily in- that stand out in stubble or old crop stalled on all types of planters, residue are also included, drills and sprayers. It is par- For further information contact ticularly useful in no-till planting Precision Laboratories, Inc., Dept, to avoid skips and overlaps and TB, P.O. Box 127, Northbrook, 11. assure accuracy in planting and 60062 or call toll free 1-800-323-6280. spraying. The Trailblazer unit features a 12V power system, stainless steel COU3WE COU3 GA! S/WINGSi ON EVERY WINTER PURCHASED BIN See your BROCK dealer and buy your new Brock grain bin Winter time is the best price time It is also the time to o make sure your bin is erected and ready for larvest le next There's cold cash to be saved now BROCK. si 1 I low MUC II NOU OVS SAVI Itt Si i IV ■ SOI IK KH( K K Dl Al I K AGR»* COMPLETE SYSTEMS, EQUIPMENT. SALES. INSTALLATION. SERVICE FOR CATTLE. HOG, POULTRY AND GRAIN. 2754 Creek Hill Rd., Leola, PA 17540 PHONE: 717-656-4151 SERVING PA, NJ. AND N.Y. Research at Northrup King shows that many cold tolerant hybrids can germinate and grow at temperatures under 50 degrees Fahrenheit. “We’ve observed inbred lines which germinate at 45 degrees,” says Shubat. Recent tests at lowa State University indicate that inbred selections which rate very high in cold tolerance can survive soil tem peratures as low as 40 degrees. “There is little question that the trend to more no-till will con tinue,” Shubat concludes. “We’re proud to take a leadership position by providing growers with a means of quickly determining which hybrids can perform best for both no-till and early planting con ditions. Once they leam to use cold tolerance ratings as part of then hybrid selection process, they’ll see that it lets them confidently choose a hybrid which has the best potential to produce a good stand and grow well.” In Illinois call 312-498-0800 EQUIPMENT,me STORE HOURS Mon -Fn 7 30 to 4 30 Sat 7 30 to 11 30
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