Influence of Soil Temperature on Corn Germination and Growth. We experienced June-like temperatures in March. Trees budded, spring flowers bloomed and fertilizer rigs crisscrossed fields. Soil temperatures matched what we normally experience in late April and early May, jumping well ahead of previous records.
An algal bloom is a rapid increase or accumulation in the population of algae (typically microscopic) in a water system.
The photoorientation of Peridinium gatunense, which causes massive algal blooms each year in Lake Kinneret (Israel), is characterized using a microcomputer-controlled video immage system. The cells show positive phototaxis under a wide light irradiance range from 1 lx up to about 18 klx, i.e., to about fifth of the natural solar radiation measured on the water surface.