potato problems

I have been growing potatoes for about 8 years now. the past two years i have been getting only 1 or 2 golf ball sized spuds per plant and i normally plant close to 75 plants.i do move them around year after year so im not planting in one place. what is the problem? could it be the soil?
thanks for your help

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1 Comment To "potato problems"

#1 Comment By Downtoearthdigs On 07/19/2018 @ 4:31 pm

Temperatures are too warm. Potatoes require cool nights below at about 55°F for good tuber formation. Plant so that tubers mature in cool weather.
Planting time. Potatoes grow best where the soil temperature is at least 50°F. Potatoes are usually planted in spring as early as 3 weeks before the last expected frost. Planting time can vary to avoid hot, dry conditions and to minimize disease and pest problems.

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