Reduce Fertilizer

While it may seem counterintuitive to reduce fertilizer usage to increase yields, a significant reduction of fertilizer is necessary to obtain the highest yield increases when using products containing the technology of SumaGrow®.

The microorganisms in co-branded products containing SumaGrow® contain beneficial microorganisms specifically selected because they work within the soil and the root of the plant to capture existing and applied nutrients, unlock bound soil nutrients and convert nitrogen from the air into a form plants can utilize. Because of the microorganisms’ ability to efficiently utilize their resources, a reduction in applied nutrients is critical.

There are several controlled studies which have been performed which show the negative effects of full fertilizer and the addition of SumaGrow® products.

Mississippi State University

Mississippi State University conducted controlled field trials on cilantro and tomatoes in Crystal Springs, MS. The table below shows the response of cilantro shoot yields comparing 50 percent conventional and 100 percent conventional fertilizer rates (growers standard), with the addition to both of a SumaGrow® product application at the rate equivalent to one gallon per acre.

Cilantro

Treatment Fertilizer SumaGrow® Product Total Weight
1 50% Reduction No 2.50
2 50% Reduction Yes 2.98
3 100% Fertilizer No 2.50
4 100% Fertilizer Yes 2.58

Tomatoes

Treatment Fertilizer Rate SumaGrow® Product Total No. Total Weight
1 50% Reduction No 147.0 72.1
2 50% Reduction Yes 158.5 83.0
3 100% Fertilizer No 156.0 72.7
4 100% Fertilizer Yes 150.3 71.3

Tecomate

Barenbrug’s U.S. subsidiary, Tecomate performed tests for hunters’ food plots to determine whether SumaGrow® increased the protein levels of forages. Higher protein levels are a contributing factor for larger antlers in deer. Two different hunter food plot seed mixtures- Tecomate Monster Mix and Tecomate Max-Attract 50/50 - were tested to determine both the protein percentage and yield.

When the traditional grower standard fertilizer treatment was reduced (200 lbs, 100lbs and zero) and a SumaGrow® product was added at the rate of one gallon per acre, yields increased. Protein levels continued to increase as the fertilizer was reduced. For the Monster Mix, the highest yield was obtained with a 33 percent reduction in fertilizer, or 200 pounds of triple 13 NPK per acre with the addition of a SumaGrow® product, and for the Max Attract 50/50, the highest yield was obtained with a 67 percent reduction in fertilizer, or 100 pounds of triple 13 NPK per acre and the addition of a SumaGrow® product.

Tecomate Monster Mix

Plot Number Fertilizer Rate per Acre (lbs.) SumaGrow® Rate per Acre (gallons) Yield in Voluve (lbs.) Protein Result (%)
1 300 0 8.75 0.001
2 300 1 8.50 0.42
3 200 1 9.75 0.50
4 100 1 8.50 0.87
5 0 1 8.25 2.33

Tecomate Max-Attract 50/50

Plot Number Fertilizer Rate per Acre (lbs) SumaGrow® Rate per Acre (gallons) Yield in Volume (lbs) Protein Result (%)
1 300 0 8.75 3.95
2 300 1 7.00 4.09
3 200 1 8.50 4.36
4 100 1 9.25 4.56
5 0 1 8.75 4.44