One way to smooth out fluctuations in prices is to operate price support schemes e.g. through the use of buffer stocks. Buffer stock schemes seek to stabilise the market price of agricultural products by:
Buying up supplies when harvests are plentiful.
Selling stocks onto the market when supplies are low.
In theory, buffer stock schemes will be profit making, since they buy up stocks of the products when the price is low and sell them onto the market when the price is high. However, they do not work well in practice, many buffer stock schemes have collapsed.