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19.5 Map The Acidity, Save The Harvest
Manage episode 523612890 series 3547738
We dig into why low (acidic) soil pH unlocks aluminum toxicity, how that halts root growth, and which crops suffer first. Then we lay out a practical plan to find acidic patches with smarter sampling, NDVI, and grid-the-zone strategies, and point to lime and buffer pH for the fix.
In this episode, we discuss...
• soil pH as chemical control and pH level of 7 is neutral
• aluminum toxicity risk to crops increases below 6.5 pH
• wheat relatively tolerant, legumes struggle with nodulation
• stunted roots and thin stands on slopes and sandier spots
• acidic areas are patchy and do not always follow productivity maps
• importance of using intensive grids and how 0–3 inch sampling in no-till helps detect acidicity issues
• soil testing: pair pH with buffer pH to set lime rates
• target NDVI-low areas and grid inside zones
• variable-rate lime as the remediation path
Gridding the Zone with Ag Genesis Part 1: https://www.buzzsprout.com/2297340/episodes/16692855
Gridding the Zone with Ag Gensis Part 2:
https://www.buzzsprout.com/2297340/episodes/16692855
Tune in next time for a Tiny Byte of knowledge from GK Technology, where we have a map and an app for that.
https://gktechinc.com/
Chapters
1. Framing The Low pH Problem (00:00:00)
2. pH Basics And Nutrient Availability (00:00:36)
3. Aluminum Toxicity And Crop Tolerance (00:02:09)
4. Field Symptoms And Visual Clues (00:04:30)
5. Finding Problem Spots With Sampling (00:05:23)
6. Zones, NDVI, And Practical Gridding (00:07:20)
7. Lime, Buffer pH, And Next Steps (00:09:22)
8. Quick Recap And Resources (00:10:06)
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