Calibration Instruments go/no go gauge in assessing the fuel Load of wood in the Iran (Case Study Loblolly pine forestation in Lakan city Rasht Forest of Gilan)

Measure the fuel load of down woody debris with changes Line intersect sampling were proposed by Brown for the first time in 1974, and were used the go/no go gauge as a means to accurately measure the fuel load wood in different classes diameter in the floor of forest. Evaluation of fuel load is critical need to reduce hazardous fuels around the world, which should be a new category to be used the management of wildfires in Iran. For the introduction and use of the go/no go gauge on the estimated fuel load of down woody in Iran forest''s, Combustible materials from the part of Gilan forestation (Loblolly pine forestation) was evaluated for the calibration. For this purpose Were compared down woody debris on the forest floor with ruler and go/no go gauge by using Line intersect sampling in the systematic random sampling method. The results show that the go/no go gauge measures too quickly and easily the forest fuel, in addition to has high efficiency in the evaluation and assessment of fuel load of down woody; so there is no significant difference in the amount of calculated fuel load at 95 percent by the go/no go gauge (5.21 t/h) and the ruler (5.02 t/h). In terms of speed measurement the results showed that the go/no go gauge can lower the more than one third the measure times, that this times will be noticeable in terms of inventory costs.