החיפוש שביצעת - irrigation requirements data imprecision a penting* - חזר ריק.

אולי כדאי לנסות איות אחר או כתיב מלא:
irrigation requirements » irrigation equipment, nutrition requirements
requirements data » requirements a, requirements case, requirements based
data imprecision » based imprecision, table imprecision, data compression
imprecision a » imprecision _, precision a, precision _
a penting » a penning, a penang, a pectin

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