Robert Mikkelsen

Internatonal Plant Nutrition Inst
4125 Sattui Court
Merced, CA
USA 95348
Email: rmikkelsen@ipni.net

Papers:
Could Leaf SPAD Values (Chlorophyll index) Compliment Nitrogen, Phosphorus, Potassium, Calcium, Sulfur, Magnesium, and Iron Nutrient Status in Romaine Lettuce (Lactuca sativa)