Even if enough Fe is in the soil, deficiency can occur under the following conditions: poorly drained soil, high Ca, high Mn, high pH, high P, high heavy metals, oxygen deficiency. Deficiency symptoms General: Yellow or white areas on youngest leaves. Older leaves remain green.
Bt corn is a variant of maize that has been genetically altered to express one or more proteins from the bacteria Bacillus thuringiensis. The protein is poisonous to certain insect pests and is widely used in organic gardening. The European corn borer causes about a billion dollars in damage to corn crops each year.
People hold signs during a demonstration against agribusiness giant Monsanto and genetically modified organisms (GMO) in front of the White House in Washington on May 25, 2013.(Photo/NICHOLAS KAMM/AFP/Getty Images).r. Chapela pointed to studies showing that Bt toxins found in Monsanto crops damage red blood cells in humans, not only insects, and Dr. Chapela has been talking about the dangers of GM corn for years.