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.
Introduction: Bacillus thuringiensis (Bt), is a gram-positive soil bacterium, with a genome size of 2.4 to 5.7 million basepairs. The prevalence of this strain is not restricted and has been isolated worldwide from many habitats, including soil, stored-product dusts, insects, deciduous and coniferous leaves.acillus thuringiensis (Bt), is a gram-positive soil bacterium, with a genome size of 2.4 to 5.7 million basepairs. The prevalence of this strain is not restricted and has been isolated worldwide from many habitats, including soil, stored-product dusts, insects, deciduous and coniferous leaves.