Which of the following defines Steenberg effect?
◦ Under severe deficiency, rapid increases in yield with added nutrient can cause a small decrease in nutrient concentration.
◦ Increases in nutrient concentration above the critical range indicate that the plant is absorbing nutrients above that needed for maximum yield.
◦ Elements absorbed in excessive quantities can reduce plant yield directly through toxicity or indirectly by reducing concentrations of other nutrients below their critical ranges.
◦ Crop yield is proportional to the amount of the most limiting nutrient. Once this nutrient deficiency is corrected, yield will increase to a level limited by some other nutrient.