Preston: 563-689-3622 Maquoketa: 563-652-5332


We offer various types of fertilizers for our customers’ crop input needs. We carry the following fertilizer inputs:

Anhydrous Ammonia (NH3) available with N-Serve stabilizer

Dry Products

  • Urea 46-0-0 available with stabilizer
  • Phosphate 11-52-0 MAP available with enhancer
  • Potash 0-0-60
  • Sulfur 21-0-0-24S
  • SuperCal SO4
  • Pel Lime

Liquid Products

  • Nitrogen 32-0-0
  • Phosphate 10-32-0
  • Potash 2-3-60-6s
  • Sulfur 12-0-0-26s
  • Starter Fertilizer 6-24-6-.25z

We also offer soil sampling here at Eberhart Farm Center which can help our farmers monitor the nutrients and micronutrients within their soil.

Soil Sampling

  • Grid sampling at 2.5 acre grid size
  • Conventional sampling
  • Results given on pH, P&K, Calcium, Magnesium, Organic Matter, Sulfur, Zinc, Boron, Iron