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Northeast central NE | Hybrid A is a flex hybrid with lighter deeper kernels while hybrid B is a harder shallower heavy test weight hybrid. Both hybrids yielded 200 bushel an acre but more loads to town are required with hybrid A because the kernels are larger and lighter, they take up more space. Hybrid B depends on high test weight to maximize yield, adding test weight all the way to black layer. On a year that both types reach maturity test weight doesn’t matter. Let’s say you have a growing season that’s cut short by overpowering disease pressure that kills a hybrid B before it reaches full maturity, thereby robbing the plant the time required to maximize kernel weight. A semi load of hybrid A went across the scale at the elevator and printed on your ticket it states 56lb in the test weight column, pretty normal for that hybrid.
A semi load of hybrid B goes across the same scale and also shows 56 lbs in the test weight column, way lighter than the typical 60 lbs that hybrid is expected to have. Now wether you like the terminology or not, the accepted way of saying it in farm country is hybrid B lost yield because of lighter test weight, and it did because it was bred to have high test weight. You could drive for hundreds of miles last year and stare at field after field of dead brown corn in late August. Did that reduce yields? Logic would say so when the bulk of the seed companies have the bulk of their lineups in the B hybrid category. | |
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National map of ECO/SCO
