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Most crops come to maturity around the same time every year, give or take a week
or two. A lot depends on the strength of the sun over the last week or so of ripening. If your detecting is mainly going to be done on arable land, you can carry it out in two different ways:
First: if you have lots of land to cover in a short period of time, use a light, fast recovery detector, without a meter.
Most detectors that fall into this category are in the mid-price range. These detectors allow you to sweep faster and cover more ground, picking up targets either on top of the ground, or just a couple of inches down. Recovery speed is the length of time a detectors electronics take to recover from registering one target before they can register another target. To test your
recovery time, place three or four items on te ground about 30cm apart.Place them in a fashion so that you
sweep over them all in a single pass. Swing your loop over them, counting slowly, as you sweep from left to
right and back again. If the detector registers each target with a quick beep, while you count no higher than
five or six for the complete sweep, then the detector is fine for this type of detecting. If you have to revisit the
same fields using this detector, I would suggest slowing your sweep down slightly, counting to seven or eight for the complete sweep. It will give your detector the chance to pick up on the deeper targets. |