Anions and cations in plants, but why do we care?
All this positive-negative, cation-anion, high CEC-low CEC stuff comes into play when applying nutrients and water. Table 1 gives the soil-borne elements necessary for plant growth, the form taken up by the plant and the element’s mobility in the soil. Note that most mobile elements have a negative charge and the somewhat mobile and immobile elements have a positive charge. Over application of a (-) charged element followed by excessive water will quickly move that element through the system. Likewise, over application of most (+) charged elements on a low CEC soil can move that element through the system since there are not enough (-) charges on the soil particle surface to bind to the cation.
The odd anion is phosphorous. Even though it has a (-) charge, it is not mobile in soil because phosphorous forms are not very soluble. It can, however, still move – not as the anion, but bound to soil particles as the particles move. Therefore, minimizing runoff is helpful in reducing phosphorus pollution.
Understanding nutrient movement in soils helps producers apply nutrients and water to maximize economic effectiveness while minimizing environmental impact.
- Researchers find boron facilitates stem cell growth in corn
- Novozymes and Monsanto showcase new ag innovations
- Case IH introduces real-time AFS Connect 2.0
- Bayer CropScience plans 2015 release of new corn herbicide
- Valmont acquires majority stake in AgSense
- DuPont announces investment in seed treatment solutions
- No El Niño in 2014? Drought-weary California in trouble
- Suspected Bt corn rootworm resistance in Pennsylvania
- BioNitrogen to build second fertilizer plant in Texas
- Soybean aphid numbers on the rise
- Commentary: Setting the record straight on 'Waters of the U.S.'
- Solar energy jobs increase, wind power decrease