The illustration present the work of a farmer to grow a wheat crop, in a cycle of a year.
Overall, it is clear form the digram, that the farmer start the planting at September by ploughs the field, and spreading fertilliser on the field and after, in October the farmer sows the field.
According to what is shown, after five months in the spring in March and April the farmer start the protection period by sprying the crop with weedkiller to insure the safety of the wheat crop until the summer, or he could skip the spring period and sprays the crop with insecticide by the end of October.
In the summer in August, the farmer harvests the wheat by using the a combine harvester, and start either sell it in the market or store the crop on the farm, and after that the cycle keep going the same year after year.
