Nutrient solution pH resulting from growing Fe‐efficient and Fe‐inefficient soybeans

Abstract

Hawkeye and PI54619–5–1 soybeans (Glycine max L.) were grown in nutrient solution at a low iron level (10^‐5 M FeEDDHA) and at initial pH of near 4.0 and at 7.0. The solution pH was monitored regularly and it was observed that the Fe‐inefficient cultivar PI54619–5–1 at the high pH resulted in a further increase in solution pH while growing yellow Fe deficient plants with decreased yields. The Hawkeye soybean gave similar results but less pronounced.

Key words:

• Iron
• plant cultivars
• plant stress
• pH of nutrient solution