The nitrate level has fallen from 220 ppm to 21 ppm. The crop will have taken some up, but I think most of the nitrate was washed downwards during the heavy rain in week 1. That's why I'm only applying a little bit of water and making sure the 20 cm detector is activated but NOT the detector buried at 40 cm. I'm hoping there is still a lot of nitrate between 20 and 40 cm depths.
Thursday, January 14, 2010
Week 3: Nitrate
The nitrate level has fallen from 220 ppm to 21 ppm. The crop will have taken some up, but I think most of the nitrate was washed downwards during the heavy rain in week 1. That's why I'm only applying a little bit of water and making sure the 20 cm detector is activated but NOT the detector buried at 40 cm. I'm hoping there is still a lot of nitrate between 20 and 40 cm depths.
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