Conducted by: Dr. K. Bruce Kirksey, AgriCenter International, Memphis, Tennessee
Huma Gro® Products: Jackpot®, Calcium, Super Potassium®, Zap®
OBJECTIVE
This field trial was conducted in order to compare sweet potato crop yields and return on investment (ROI) obtained when a Huma Gro® soil product (Zap®, for feeding soil biology and improving soil fertility) and 2 applications of 3 Huma Gro® foliar nutrients (Jackpot®, Calcium, and Super Potassium®) were applied in various combinations.
MATERIALS & METHODS
This trial on sweet potatoes (Ipomoea batatas, Var. Bueareguard) was conducted in Memphis, Tenn., in a randomized complete block study with 4 replications. The sweet potatoes were machine transplanted into conventional-till silt loam soil 12.6’ x 30’ plots. The sweet potatoes were planted on June 25.
Four treatment programs were compared: (Treatment 1) the grower’s standard preplant program of 20-60-60; (Treatment 2) the grower’s standard plus Huma Gro® Zap® applied in-furrow; (Treatment 3) the grower’s standard plus 3 Huma Gro® foliar-applied products—Jackpot®, Calcium, and Super Potassium®—applied at 30 days and again at 15 days prior to harvest; and (Treatment 4) the grower’s standard plus Huma Gro® Zap® plus 3 Huma Gro® foliar-applied products applied at 30 days and again at 15 days prior to harvest.
RESULTS

CONCLUSIONS
Micro Carbon Technology® in Huma Gro® soil and foliar products contributed to significant sweet potato yield and revenue increases in all three of the Huma Gro® treatments evaluated in this study. Though adding Huma Gro® products increased initial costs, the greater yields and net profits generated by the treatments resulted in a return on investment that paid for the cost and application of the Huma Gro® products many times over ($10–$12 dollars returned for every $1 spent).
Click here to download/view the report.
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