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Navigable Waters Protection Rule Takes Effect in 49 States

The new Waters of the United States rule, now known as the Navigable Waters Protection Rule, on June 22 took effect in 49 states. But even before the rule had taken effect, there were already several organizations and states bringing court cases against it.
 
One lawsuit was brought by 17 states in the Northern District of California requesting an injunction to block the rule from taking effect. In a win for the rule and for dairy farmers, this request was denied June 19. However, just hours later, a district court judge issued a preliminary injunction for only the state of Colorado, which the Department of Justice will now appeal. NMPF was pleased with the ruling in California; still, more lawsuits are expected, making it likely that a patchwork of different rules may develop, as has long been the case with navigable-waters rules.
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Validating Net Energy in Commercial Swine Systems - Gustavo Lima

Video: Validating Net Energy in Commercial Swine Systems - Gustavo Lima


In this episode of The Swine Nutrition Blackbelt Podcast, Gustavo Lima, PhD candidate at Iowa State University, explains how soybean meal net energy is evaluated using growth assays and calorimetry. He discusses caloric efficiency, validation under commercial conditions, and differences between controlled and real-world environments. Gustavo also highlights practical implications for diet formulation and ingredient valuation. Listen now on all major platforms!

“Indirect calorimetry provides a precise estimation of ingredient energy, yet validation under production conditions remains essential for accurate application in real systems.”

Meet the guest: Gustavo Lima / gustavo-lima-a9867127 is a PhD candidate in Animal Science at Iowa State University, specializing in swine nutrition, ingredient evaluation, and energy metabolism. With over 15 years of experience across Latin America, his work focuses on soybean meal utilization, caloric efficiency, and applied research for commercial production systems.