Unfortunately, few detailed studies have been done correlating bee visits to flowers with yield, quality and related factors. MacGregor, therefore, recommends that where yields are low, an additional one to three colonies per acres should be provided for at least 3 years to determine their value to pollination. They should not be overlooked by those providing pollinating services. Agriculture Handbook 496 also reviews some tropical crop plants. Careful reading of MacGregor's book reveals that determining the value of bees for pollination is not an exact science.
Authorities often disagree about pollination recommendations as well.
Disagreement and the fact that much of the data referenced may not apply to specific areas of Florida, means the would-be pollinator must keep good records about pollination efforts concerning yield increases and do periodic spot checks directly in the field. Simply moving bees into a field and managing them well is not enough. Examples of what might go wrong are numerous and could be anything from the bees dying because of pesticides to starvation. Many crops will not nutritionally support bees while they are pollinating. One can also expect surprises.