By Blake Jackson
While grazing cattle on corn stalks offers potential benefits, it's essential to consider its impact on soil health. While nutrient removal is lower than expected, soil compaction remains a concern.
Nutrients removed through grazing are minimal, with potassium nearly zero due to recycling through animal waste. Phosphorus and calcium levels in corn stalks are insufficient, so mineral supplementation is necessary.
In fact, feeding minerals can modestly increase these nutrients in the field. Nitrogen removal is estimated at around two pounds per acre.
Soil compaction can be mitigated by avoiding grazing on wet soil and managing cattle traffic through strategic water placement. By ensuring cattle consume only leaves, husks, and non-harvested grain, residue removal can be minimized.
Studies suggest a stocking rate of one 1200-pound cow per acre per month for every 100 bushels of grain yield per acre to achieve this.
Long-term studies in Nebraska indicate no significant difference in yields between grazed and non-grazed fields in the following year.
Soil bulk density remained stable, with minimal compaction observed in silt and clay loam soils. However, grazing on wet soil can cause some soil roughness.
Grazing can positively impact soil microbial life due to animal waste deposits, leading to better nutrient cycling and potentially higher yields.
Reduced crop residue can also contribute to improved stand establishment and faster spring growth.
Grazing corn residue can be a valuable tool for managing crop residue and potentially boosting subsequent crop yields.
By implementing proper grazing practices, farmers can minimize negative impacts on soil health while enjoying the benefits of increased nutrient cycling and improved soil microbial activity.
Photo Credit: gettyimages-awakr10
Categories: Wisconsin, Crops, Corn