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Pioneer wants your data
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dloc
Posted 7/12/2006 10:56 (#25841 - in reply to #25704)
Subject: Re: Pioneer wants your data


I can understand your offense but if you are going to use your position to give advice, please make certain it is the correct advice. The replicated small plot designs used today date back to a time when statistical calculations were done by hand, yes by hand with paper, pencil and slide rule. Small plots in a carefully selected part of the field minimizes the natural spatial variation in yield that exists in all fields and make it easier to define real differences. We still have the same amount of spatial variation across a field that Grandpa did; and today we have computers that can do serious number cruncing in a flash.

The best statistical design is replicated strips the full length and the full width of the field. Then by using GIS software, you can sort out the diferences between variety performance in high ground, slopes, wetter areas, dryer areas, the old winter manure hauling area, etc.

It is nice that you calibrate your weigh wagon to the elevator's scale. But is their scale calibrated? Scales are checked and recalibrated for a reason.

It is nice that you rant about the difference between mass (a weight measurement) and bushels (a volume measurement) and then indict all yield monitors regardless of how they measure the harvest.

For the yield monitor designs that I am familiar with, using a soybean calibration on corn will affect absolute accuracy but not relative accuracy. Yield is defined electronically by a signal bias of a sensor signal.

Am told that the average lifespan for a variety today is 3 years. It is time for farmes to define a coping strategy.
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