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California, Hawaii, New Mexico and Texas
It ended around 30 BC after the last conquest of the Hellenistic Kingdom in Rome
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A chemical fertilizer is defined as any inorganic material of wholly or partially synthetic origin that is added to soil to sustain plant growth. Organic fertilizers are substances that are derived from the remains or byproducts of natural organisms which contain the essential nutrients for plant growth.
Studied the digestive system for two decades. Received the Nobel Peace Prize for Psychology in 1904. Discovered classical conditioning with his work on salvation of dogs.Unconditioned Stimulus<span>Stimulus that naturally triggers response</span>
