will be used in the production of wood chips.
Therefore, element contents might differ substantially from
conventional forestry were the harvested biomass consists
mainly of stems of large diameter with a low percentage of
bark. The special characteristics of the biomass and the
high intensity of harvesting lead to the conclusion that
nutrient exports from alley cropping systems managed as
short rotation coppices are higher than from conventional
forestry.
However, since alley cropping systems are established
mainly on arable land, on sites with medium or poor soil
quality, the comparison of nutrient exports from alley
cropping with that from conventional agricultural production
schemes seems somewhat more appropriate. Nutrient exports
in agriculture are high due to the intensive management, were
biomass is exported at least once a year and exported
nutrients regularly have to be replaced through fertilization.
Therefore, where annual crops will be substituted by strips of
short rotation coppices, annual nutrient exports from the site
are expected to become lower.
3.1. Nutrient export of alley cropping systems
will be used in the production of wood chips.Therefore, element contents might differ substantially fromconventional forestry were the harvested biomass consistsmainly of stems of large diameter with a low percentage ofbark. The special characteristics of the biomass and thehigh intensity of harvesting lead to the conclusion thatnutrient exports from alley cropping systems managed asshort rotation coppices are higher than from conventionalforestry.However, since alley cropping systems are establishedmainly on arable land, on sites with medium or poor soilquality, the comparison of nutrient exports from alleycropping with that from conventional agricultural productionschemes seems somewhat more appropriate. Nutrient exportsin agriculture are high due to the intensive management, werebiomass is exported at least once a year and exportednutrients regularly have to be replaced through fertilization.Therefore, where annual crops will be substituted by strips ofshort rotation coppices, annual nutrient exports from the siteare expected to become lower.3.1. Nutrient export of alley cropping systems
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