Research Trial Results
Persist PAF liquid improves celery yield 159%* in production celery trial.
* Extrapolated yield increase based on increased counts, weights, and marketability of celery in PAF treated plots. Trial concluded in July 2024 and was conducted by Holden Research & Consulting (Camarillo, California)
With fusarium present in the soil, Persist PAF produced significantly higher-quality plants, better marketability, and large increases in weight and counts compared to the control. A one-percent (1:100) PAF solution was applied as a soil drench in a pre-plant application and subsequently over the top of plants at two, four, and eight weeks post-planting.
Karrikaid-PRO liquid produces 7% more soybean plants and 4% larger plants.
* SynTech Research Group (Jefferson City, Iowa, U.S.A.)
Two liquid applications of Karrikaid were made: One pre-planting and the second at six weeks after planting.
PEPPER: 15% yield increase and a net ROI gain of +$4,800 acre in bell pepper production trial.
Persist biochar and PAF liquid produced a 15% greater number of peppers and a 13% overall increase in harvested weight per acre.
- Third-party production trial conducted by Holden Research and Consulting (Ventura County, California). Randomized Complete Block.
- In-season tissue sampling showed treated plants had a remarkably higher nutrient uptake, including 22% greater Nitrogen.
- End-of-season soil analysis showed significantly higher retained nitrate nitrogen for the treated plots compared to the control.
- Before planting, Persist™ Biochar was placed in the slot at a rate of 480 lb/acre. Persist™ PAF liquid was applied at 1% dilution with a backpack sprayer at a total rate of 3.5 gal/acre (four applications total).
- Control: Grower standard program of 160 lb/acre of nitrogen, 48 lb/acre of P2O5, and 90 lb/acre of K2O.
14% strawberry yield increase.*
* Marketable strawberries. Extrapolated flats per acre compared to the grower’s standard.
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- Outdoor production trial conducted by Holden Research and Consulting (Ventura County, California) — Fall 2022
- Completely randomized data collection of six replicates. (Portola variety).
- Before planting, Persist Biochar was placed in the slot at a rate of 480 lbs/acre. Persist PAF liquid was applied at 1% dilution with a backpack sprayer at a total rate of 3.5 gal/acre (four applications total).
- At planting, all treatments received controlled release fertilizer and in-season applications of nitrogen and phosphorous, along with foliar pest control.
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Broccoli Nursery Trial (Spring 2023)
61% increase in total plant weight.
- Broccoli nursery trial conducted Spring 2023 by Holden Research and Consulting (California).
- 1% dilution of Persist PAF liquid, two foliar spray applications.
- Average root weight increased 63%.
- Average plant weight increased 61%.
- Looking at dehydrated weights, the total average broccoli plant weight increased 156% compared to the grower’s standard, without any PAF treatments.
CELERY: Persist PAF produces 72% greater new root growth and a 31% increase in plant weight.
- Celery nursery trial conducted January-March 2023 by Holden Research and Consulting (Ventura County, California, U.S.A.).
- Two foliar applications of PAF were applied.
- The trial interval was 30 days, with appropriate data collected throughout the trial.
Pyroligneous Acid White Paper
Discover the powerful benefits PA provides for the plant-soil system — and the planet.
Persist Biochar-based grow media improves cannabis flower yields by 60% compared to coco coir.
- Cannabis Indoor Grow Media Trial (Oct-Dec 2019) – Conducted in partnership with MedMen.
- Persist’s 10% Biochar/Coco grow media was evaluated against 100% Coco Coir and Rockwool grow media (control). The trial included over 1,000 plants.
- For the Tangie Dream strain, Persist’s Biochar/Coco media produced 200% more flowers (g/sq ft) than Rockwool and 17% compared to 100% coco grow media.
- For the Blue Dream strain, Persist produced 117% greater yield than Rockwool and 60% compared to Coco Coir alone.
Hydroponics Tomato Grower Trial (2021)
15% yield increase with 40% less water.
“Biochar is everything and more that you claimed it would be and is destined to be for tomatoes and agriculture what the reef system is to Hawaii, a living eco system.”
Marshall Ige, Ige Group, Hawaii
- The grower replaced perlite pots with 100% biochar.
- The biochar pots were approximately 3x heavier compared to perlite pots, even after the grower had cut water consumption by 40% in biochar pots compared to perlite pots.
- The plant leaves were greener, the tomatoes were rounder and redder, and did not show any cracks. This is in addition to realizing a production yield improvement of 15% within two months of planting.
Persist Biochar holds water in soil
up to six times longer.
- VGrid internal trial conducted July 2020.
- Geraniums were planted in two self-watering pots, then top-watered and filled.
- After 15 days, the water level indicator in the non-biochar planter dropped significantly but remained virtually unchanged in the biochar-amended (20%) planter, even after 30 full days of no water.
- After 49 days of no additional watering, the flowers in the biochar-amended pot were still in bloom, and the leaves were green and healthy. However, the flowers in the non-biochar pot had died.
Persist Third Party Validation
OMRI Listed® for use in certified organic operations under the USDA National Organic Program.
Certified by the USDA as an all-natural, 100% biobased product.
Meets the stringent quality standards established by the International Biochar Initiative
Certified carbon negative by Puro.Earth, the world’s leading carbon crediting program.
info@vgridenergy.com
+1 (805) 482-9040
513 Calle San Pablo, Camarillo, CA 93012
