Further industrialization led to the use of monocultures, when one cultivar is planted on a large acreage. Because of the low biodiversity, nutrient use is uniform and pests tend to build up, necessitating the greater use of pesticides and fertilizers. Multiple cropping, in which several crops are grown sequentially in one year, and intercropping, when several crops are grown at the same time, are other kinds of annual cropping systems known as polycultures.
further industrialization led to the use of monocultures when one cultivar is planted on a large acreage because of the low biodiversity nutrient use is uniform and pests tend to build up necessitating the greater use of pesticides and fertilizers multiple cropping in which several crops are grown sequentially in one year and intercropping when several crops are grown at the same time are other kinds of annual cropping systems known as polycultures