Research has shown that. corn planted in twin- rows has more equidistant (EQ) plant. spacing, which should minimize the effects of water, nutrients, and light interception competition among plants, especially. early in the season and before a complete canopy is formed.
Morning erections are not just dependent on DHT and testosterone, however, and the evidence points to the critical role of nitric oxide as well. Nitric oxide within the corpus cavernosum, the erection cavity within the penis is what dilates the penile arteries and causes the morning erections. 1. Testosterone.
The causes of erection problems can be physical, psychological, or a combination of the two. Physical causes of erection problems are more common in older men. They occur because of disorders that can affect the nerves and blood vessels responsible for causing an erection. 1  Physical causes of erectile problems include: 2  heart disease. 3  atherosclerosis (hardening of the arteries). 4  high blood pressure. 5  diabetes. 6  obesity. 7  high cholesterol. 8  Parkinsonâs disease.