<em><u>Global warming affects agriculture in a number of ways, including through changes in average temperatures, rainfall, and climate extremes (e.g., heat waves); changes in pests and diseases; changes in atmospheric carbon dioxide and ground-level ozone concentrations; changes in the nutritional quality of some foods; and ...</u></em>
The water is lacking nutrients because of the flood. Therefore the crops basically drowned , and there isn't enough Sunlight to reach them while under water.plus there is too much water.