The production usually takes place on farms, but it can occur in smaller-scale situations, too, such as market gardens and on domestic plots. Essentially, the soil is tilled without the same level of intensity as conventional farms and without the use of manufactured fertilisers to replenish soil nutrients. Sometimes fields are left fallow, or crops are rotated to produce organic ailments without the need for them. Also, some crop wastage is accepted due to pests accessing them without powerful counter-measures, such as applying chemical pesticides. Natural alternatives are sometimes deployed instead. When harvested, organic crops are kept separate from other crops so that consumers can tell whether or not what they are buying is from an organic source or not.