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.
On the other hand, others defend genetically modified crops as an answer to providing food for the worldâs growing population. NBC Latino decided to talk to scientists on both sides of the debate about biotech agriculture and the controversial genetically-modified organisms (GMOs) it produces.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.