The scene shown couldn't be more mundane: low fields, a couple chatting, a church against high sky.
It was a short paddle from the flat beach inland of him, with the caravans on the low fields above, but it felt private.
Early in the history of agriculture, people realized — without, obviously, understanding the chemistry behind this insight — that when usable nitrogen ran low fields turned barren.
Recent days have been relatively warm and without rainfall, with the temperature not dropping below 5C, but the thick mist clinging to the low fields and wooded hills has added to the clammy chill.
Conversely, in a pure, homogeneous material, in which there are few imperfections, it will be easy to magnetize the material to saturation with relatively low fields, and the remanent magnetization will be small.
In low fields, such as the Earth's magnetic field, the NMR signal is expected to be weak because the nuclear magnetization is small, but special devices can enhance the signal 100 or 1,000 times.
