求翻译：。7个林型林的钾速效钾也十分丰富。因此，各个林型的土壤肥力存在着较大的差异,林场在制订营林措施和施肥方案时,应充分考虑这些差异,因地制宜。是什么意思？

。 7 forest types of forest available potassium in potassium is also very rich. Therefore, there is large difference of soil fertility for each forest type, forest farm development of silvicultural measures and fertilization programme, should take full account of these differences, suit measures to local conditions.