pH Puzzle: Understanding and Combatting Soil Acidification

Yara's Crop Nutrition podcast

In recent years, we have seen a rise in soil acidification. Today's episode discusses the causes, signs, and effects of soil acidification, as well as strategies for mitigation, adaptation, and prevention (MAP). Joining Yara's Dr. Rob Mikkelsen is Dr. Clain Jones, renowned Montana State University Extension soil fertility specialist and Dr. Manbir Rakkar, Assistant Professor at Ohio State University who help us understand the significance of soil pH changes. Soil acidification can be caused by natural factors such as high rainfall and unbuffered rock, as well as human activities like nitrogen fertilizer application. Signs of soil acidification include stunted plant growth, nutrient deficiencies, herbicide damage, and increased fungal disease occurrence. Regular soil testing is crucial for monitoring soil pH and detecting acidification. Alternative methods for soil pH testing, such as pH sticks and remote sensing technology, can also be used. Preventing soil acidification can involve improving nitrogen use efficiency and incorporating legume crops or perennials into cropping systems. Mitigation strategies include applying lime and changing crop rotation. It is important to manage soil acidification to maintain soil and plant health and prevent long-term yield losses. Variable rate lime application and site-specific monitoring of pH can help optimize lime usage. Check out the video, "Acidification of Cropland Soil: Impact, Causes, and Solutions" that Dr. Jones created that helps explain the soil acidification issue. Read the article, "The Implication of Soil Acidity and Management Options for Sustainable Crop Production in Africa"