Describe the weather patterns the year Okonkwo promises to farm the eight hundred yam seeds from Nwakibie, and how they affect the yams.

It is the worst farming year in the history of Umuofia. The rains come late in the season, lasting only a short time when they do come. The heat from the sun is the most unbearable ever for the region, so all the yams are scorched. When at last the rain returns, it is torrential. The yams are washed away from flooding, and even trees are pulled up by the roots from the torrents of water. The weather is devastating to the yam crop.