It is a common belief that high heat and humidity are ideal for corn growth. In reality, high temperatures, especially high nighttime temperatures, can reduce corn yield potential by increasing respiration.

Like a house with a poorly prepared foundation, corn plants with rootless corn syndrome (or floppy corn syndrome) between the V3 and V8 growth stage can topple at any moment, leading to stunted growth and even plant death. What causes this phenomenon and how can plants survive?

Dry summers and relentless pests increase your corn crop’s susceptibility to aflatoxins, which are harmful to livestock. Reduce your exposure with effective management.

Soil acidity is one of the primary fertility issues that can limit crop growth. High levels of acid can reduce nutrient availability, restrict root growth and increase the toxicity of some elements. Soil acidification occurs naturally as the result of rainfall, plant growth, breakdown of organic matter and the application of ammonia fertilizers. Applying lime reduces soil acidity and is a source of calcium (Ca) and magnesium (Mg).

Crop harvest removes valuable nutrients from the soil. Understanding the amount of nutrients removed is crucial to understanding how to fertilize for the highest yield potential next season. With high input costs, it can be tempting to skimp on nutrients to save cost. Over time, however, this approach can reduce yield potential and profitability.

Severe drought can cause unsafe levels of nitrates to form in corn plants, especially in the lower stalks. Although precautions during silage harvest can reduce nitrate levels, dairy producers should be cautious when feeding drought-stressed corn silage.

Summer drought noticeably limits corn silage production by reducing ear size and stalk growth. As few as four consecutive days of visible wilting during vegetative growth can reduce grain or forage yield by as much as 5 to 10 percent. Yield losses of 40 to 50 percent are possible if high temperatures and limited rainfall coincide with silking and reproductive stages.

When low temperatures or frost injure young corn plants, you may wonder if these plants will recover. Carefully weigh your options and don’t make any quick replanting decisions. The key to assessing corn seedling viability is to find and observe the growing point.