NZ 611668 Disclosed is a method for interplanting a primary crop and an energy crop on a plantation site, the method comprising the steps of: planting the primary crop in a first row and in a second row, the first row and the second row being separated by an intermediate area, the intermediate area being divided into a centre portion, a first side portion, and a second side portion preparing the plantation site for planting the energy crop by: (a) lifting a soil and plantation debris mixture from the intermediate area, the soil and plantation debris mixture comprising a soil component and a plantation debris component (b) redepositing the soil component onto the intermediate area primarily into the centre portion and (c) redepositing the plantation debris component onto the intermediate area primarily into the first side portion and/or the second side portion and planting the energy crop in the intermediate area. Also described is a method of preparing a plantation site for planting an energy crop as disclosed in the specification.