|
| Stratification worries so many people, yet the vast majority of studies find no advantage to deep-banding of nutrients (indeed, sometimes there is a disadvantage to deep-banding). For an exhaustive review of the studies across the US and Canada, see
http://www.notill.org/LE_Articles/V6N3A2_Stratification.pdf
Also, the idea of ratios of nutrients in the soil having importance is really something that has been discredited, especially for K, Mg, and Ca. The plant has mechanisms to differentiate those ions during uptake.
I would agree with Hay Wilson that the ammonium acetate test for K has some problems with interpretation. Some soils that test 'Very High' still show responses at times. But it likely isn't due to an 'imbalance' -- i.e., it isn't caused by excessive Ca or Mg flooding into roots at the expense of K. | |
|
K uptake for corn
