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CCGA research featured at the Irrigation Research Foundation Farm Show Aug. 20Colorado The Colorado Corn Administrative Committee and the Colorado Corn Growers Association have developed and funded studies at the IRF this year to evaluate yields of recognized drought tolerant varieties, their rooting architecture, and nitrogen movement in a limited irrigation environment. Yields of 105 to 110 day varieties recognized for strong drought tolerant characteristics from eight leading companies are compared at 85 percent and 50 percent consumptive use water applications and at two population levels. The study is designed to identify best performing varieties promoted as "drought-tolerant" in 50 percent and 85 percent of ideal consumptive use environments. The rooting study examines root architecture of the same varieties, with evaluations at 25, 50, and 100 days after emergence, and is designed to indicate whether or not varieties with recognized drought tolerant characteristics exhibit significant differences in rooting architecture? Nitrogen concentrations and relative position in the soil profile are evaluated at three growth stages (prior to strip-till, 25 days after emergence, and just prior to tassel) in the limited irrigation environments. The goal of the research is to evaluate viability of typical nitrogen fertilization practices in limited water environments. Periodic measurements at depth intervals will be conducted to track movement and availability of N applied through center pivot in limited water applications. Monitoring technology includes AquaSpy moisture probes and precision GPS for soil sample location tracking. Final results will be available from this study by mid-December from the IRF and the Colorado Corn Growers organization. The trials will be discussed Aug. 20, in the Trautman building between 3:30 p.m. and 4 p.m. 8/18/08 Date: 8/13/08 Advertisement
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