Tissue Testing

Modern agriculture demands top yields and quality yields. Additionally, you demand profitable yields. In satisfying these demands, plant tissue analysis has become a valuable crop production tool.

Top quality and profitable yields, unfortunately, don't just happen. Many factors need to be considered like adequate moisture and fertility, proper plant population, adapted variety, disease and insect resistance and control among other things.

One of the more important factors affecting crop yields is the nutrient status of the plant or the flow of nutrients to plant tissues during the growing season. Nutrient status is an unseen factor in plant growth, except when deficiencies become so acute that visual deficiency symptoms appear on the plant.

Plant populations can be counted, and variety names or numbers can be read on the label. Rainfall can be measured with gauges. However, the determination of nutrient status of plants requires precision laboratory analysis of a plant tissue sample during the growing season

Tissue Sampling Techniques for Corn and Soybeans

 
Crop When to Sample Part of Plant to Sample Number of Plants to Sample
Corn
  • Seedling stage
  • Prior to tasseling
  • From tasseling to silking
  • All the above ground portion
  • The first fully developed leaves from the top
  • The leaves below and opposite the ear
  • 25-30
  • 15-20
  • 15-20
Soybeans
  • Seedling stage
  • Prior to or during inital flowering
  • All the above ground portion
  • The first fully developed leaves from the top
  • 20-30
  • 20-30