Date

Location

Cultural System

Vitazyme/Fertilization

Results

1997

Presque Isle, Maine

Variety:  Andover

Vitazyme application:  Vitazyme at 13 oz/acre over all areas at early bloom; no control

Comments:

No accurate determination of yield diferences could be made due to lack of a control, but the folowing items were noted:

• Greg said, "I had to keep cleaning the digging fork when sampling because it was filling up with the roots!"

• Packable quality and appearance of the tubers were improved compared to other fields.

• The treated field had many fewer air cracks in the treated tubers compare to other fields.

Fertilization:  base saturation balancing of nutrients

Date

Location

Cultural System

Vitazyme/Fertilization

Results

1997

Westfield, Maine

Variety:  Katahdin

Vitazyme application:  Vitazyme at 13 oz/acre on the foliage about July 17 over the entire field; no control

Comments:

• "I think Vitazyme is the best thing I put on my farm this year!"

• At least a 20% yield increase was achieved over other fields, and over what was expected on this field.

• Part of the field had a poor stand, but rather than yielding misshapen and uneven tubers the Vitazyme caused very even sizing and few misshapen tubers.  The yield for this part of the field was as good as for the part having a good stand.

• Some hills had up to 26 tubers per plant!

• Sizing was equal in areas of a poor stand and a good stand.

Fertilization:  base saturation balancing of nutrients

Date

Location

Cultural System

Vitazyme/Fertilization

Results

1997

Presque Isle, Maine

Variety:  Atlantic

Vitazyme application:  Vitazyme at 13 oz/acre on the foliage applied July 15 on much of the field, with a control strip left untreated

Comments:

• The Maine State Inspection Service said that the Vitazyme treated Atlantics were the best of that variety they have seen in 1997.

• Merlon stated that this field produced the best yield on Atlantics he has ever seen.

• Compared to the control strip, the Vitazyme treatment did the following:

• Substantially improved the yield

• Produced very even sizing

• Greatly increased the tuber set per plant

• The control potatoes had much less set and therefore grew too large, having poorer shape and size uniformity than did the Vitazyme treated plants.

• Chlorophyll in leaves on July 17, using a SPAD meter (average of 20 leaves):  Control - 43.3         Vitazyme - 44.4

Fertilization:  base saturation balancing of nutrients

Date

Location

Cultural System

Vitazyme/Fertilization

Results

1997

Littleton, Maine

Variety:  Superior

Vitazyme application:  Vitazyme at 13 oz/acre applied to the soil soon after planting

Comments:

• The Vitazyme treated plants had superior tuber set, appearance, and size (greater uniformity) than the untreated control.

• In spite of droughty conditions, the yield of these Superiors was greater than similar fields for some of his neighbors.

• Chlorophyll in leaves on Jul 17, using a SPAD meter (average of 20 leaves):  Control - 47.0          Vitazyme - 48.2

Fertilization:  base saturation balancing of nutrients

Date

Location

Cultural System

Vitazyme/Fertilization

Results

1998

Caribou, Maine

Variety:  Atlantic

Vitazyme application:  Vitazyme at 13 oz/acre was applied to the treated area in the growing season.

Comments:  It was not possible to separate the yields for the two areas; most of the area was Vitazyme treated.  The following facts were noted:

• The field yield was doubled in 1998 compared to 1997.  Considering the years were similar, and Vitazyme was applied to most of the field, the fertility treatments plus Vitazyme greatly enhanced tuber yield.

• According to the farmer, "We got at least a 30% yield increase for the Vitazyme area."

• Also he stated, "The summer plant sampling showed a much better root system for Vitazyme."

Fertilization:  A percent base saturation approach was used for both areas, by adding 500 lb/acre gypsum, 250 lb/acre K₂SO₄, 200 lb/acre (NH₄)₂SO₄, 150 lb/acre NH₄NO₃, 25 lb/acre S, 15 lb/acre B, and 25 lb/acre Zn.

Date

Location

Cultural System

Vitazyme/Fertilization

Results

1998

Mars Hill, Maine

Varieties:  Russet Burbank and Snowden

Vitazyme application:  Russet Burbank: (1) Vitazyme at 13 oz/acre at the 6 to 8-inch stage, and (2) again at early bloom

Snowden: Area 1: Vitazyme at 13 oz/acre at the 6 to 8-inch stage.

Area 2: (1) Vitazyme at 13 oz/acre at the 6 to 8-inch stage, and (2) again at early bloom.

Comments:  It was impossible to separate the yields for the different treatments.

Leaf chlorophyll (Snowden):

Control: 40.6 SPAD units
Vitazyme: 42.3 SPAD units

Leaf chlorophyll (Russet Burbank):

Control: 42.1 SPAD units
Vitazyme: 43.4 SPAD units

Fertilization:  All areas received nitrogen, at 196 lb/acre for the Russets and 180 lb/acre for the Snowdens.

Date

Location

Cultural System

Vitazyme/Fertilization

Results

1999

Naples, Florida

Variety:  Red Lasota

Planting date:  December 29, 1999

Soil type:  gravely (limestone)

Harvest date:  April 17, 1999

Vitazyme application:  Vitazyme at 13 oz/acre sprayed over the foliage and soil at tuber initiation, and 13 oz/acre about 12 days later

Leaf Chlorophyll:

Control: 42.0 SPAD units
Vitazyme: 43.6 SPAD units (+1.6 SPAD units)

Canopy Temperature:

Control: 75.4 °F
Vitazyme: 74.4 °F (-1.0°F)

Potato Yield:

Control: 38,200 lb/acre
Vitazyme: 40,600 lb/acre (+6%)

Income Increase:

+$384.00/acre

Fertilization:  1,300 lb/acre of 7-10-10% N-P₂O₅-K₂O, broadcast preplant and incorporated;

1,200 lb/acre of 12-4-18 dropped in the rows four inches apart and scratched into the shoulders of the hills, at four-inch stage

Date

Location

Cultural System

Vitazyme/Fertilization

Results

1999

Arkport, New York

Variety:  Reba

Planting date:  May 5, 1999

Row spacing:  34 inches

Soil type:  muck (organic)

Harvest date:  October 5, 1999

Vitazyme application:  13 oz/acre of Vitazyme with Admire insecticide on the seed pieces at planting

Leaf Chlorophyll:

Control (ACA): 39.4 SPAD units
Vitazyme: 43.6 SPAD units (+4.2 SPAD units)

Potato Yield:

Control (ACA): 13,820 lb/acre
Vitazyme: 15,700 lb/acre (+14%)

Fertilization:  1000 lb/acre of 8-8-8 preplant, and 250 lb/acre of urea sidedressed (193 lb/acre of N total)

The control area of the field received ACA (an anhydrous ammonia + zinc formulation) at 1pt/acre in the fertilizer band at planting

Date

Location

Cultural System

Vitazyme/Fertilization

Results

1999

New Yorkshire, England

Variety:  Cara (seed potatoes)

Planting date:  first weekend of May, 1999

Soil type:  sandy clay loam

Harvest date:  September 1, 1999

Vitazyme application:  Vitazyme at 6oz/acre (0.5 liter/ha) + humic acids + rhizosphere bacteria at planting;

Vitazyme at 6 oz/acre and humic acids at tuber initiation and again at tuber bulking;

total Vitazyme application = 12 oz/acre (1 liter/ha)

Total Tuber Yield:

Control: 17.5 tonnes/acre
Vitazyme: 19.0 tonnes/acre (+9%)

High Seed Quality Yield:

Control: 5.93 tonnes/acre
Vitazyme: 7.75 tonnes/acre (+31%)

Income Increase:

+$1,529.90/acre

Fertilization:  recommended applications of mono-ammonium phosphate, K₂SO₄, (NH₄)₂SO₄, and other minerals

Date

Location

Cultural System

Vitazyme/Fertilization

Results

1999

Presque Isle, Maine

Variety:  Snowden and Russet Burbank

Vitazyme application:  Vitazyme was used at the recommended rate: 13 oz/acre on the seed pieces at planting, and 13 oz/acre one week before flowering.

McCrum Farm

Comments:

Samples of plants from treated and nearby untreated areas revealed significant yield improvements with Vitazyme, up to a 33% increase.

Leaf Chlorophyll:

Control: 38.0 SPAD units
Vitazyme: 40.4 SPAD units

Irving Farm

Comments:

Treated potatoes in the test area had greater uniformity of size and better color.  No yields were determined for treated and untreated areas.

McPherson Farm

Comments:

On August 9, 1999, a significant difference in yield was detected between Vitazyme treated and untreated areas of a Russet Burbank field.  It was impossible to separate yields for the two areas due to wet conditions at harvest.  It was estimated that the treated area yielded at least 20 cwt/acre more than the adjacent control area

Leaf Chlorophyll:

Control: 38.0 SPAD units
Vitazyme: 41.4 SPAD units (+3.4 SPAD units)

Potato Weight per Two Plants:

Control: 3.75 lb
Vitazyme: 4.50 lb (+20%)

Boyd Farm

Comments:

On August 10, 1999, the Vitazyme treated areas of a field revealed higher leaf chlorophyll levels than nearby untreated areas.  The yields of treated field areas, while not documented, were higher than for untreated field areas.

Leaf Chlorophyll:

Control: 43.9 SPAD units
Vitazyme: 47.7 SPAD units (+3.8 SPAD units%)

Adams Farm

Comments:

"[Vitazyme treated] plants looked fuller with more leaves all summer.  Tubers had more even size and a very nice type."

Fertilization:  unknown

Date

Location

Cultural System

Vitazyme/Fertilization

Results

1999

Nampa, Idaho

Variety:  Yukon Gold

Planting date:  May 29, 1999

Irrigation:  sprinkler irrigated periodically

Soil type:  silt loam

Harvest date:  September 15, 1999

Vitazyme application:  Seed pieces for the Vitazyme treatment were soaked overnight in a 5% Vitazyme solution.  Vitazyme was also sprayed using a 2% solution on the leaves at about 5 inches height.

Potato Yield:

Control: 2.33 cwt/acre
Vitazyme: 3.98 cwt/acre (+71%)

Growth results:

Vitazyme spurred the time to first leafing by 9 days, increased leaf area by 30 to 40%, and produced a darker green leaf color.

Fertilization:  compost at a liberal rate

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2000

Wayland, New York

Variety:  Snowden

Planting date:  May 27, 2000

Row spacing:  36 inches

In-row spacing:  11.5 inches

Soil type:  Bath gravely loam

Vitazyme application:  13 oz/acre Vitazyme in the furrow at planting

Tuber yield:

Control: 32,175 lb/acre
Vitazyme: 36,913 lb/acre (+15%)

Leaf chlorophyll:

Control: 36.5 SPAD units
Vitazyme: 39.1 SPAD units (+2.6 SPAD units)

Income Increase:

+$307.97/acre

Fertilization:  1,000 lb/acre of 12-15-20% N-P₂O₅-K₂O with zinc

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2000

Blaine, Maine

Variety:  Russet Burbank, for French fries

Planting date:  May 29, 2000

Row spacing:  36 inches

Soil type:  gravely loam

Previous crop:  oats

Vitazyme application:  two 13 oz/acre applications of Vitazyme

Potato Yield:

Control: 280 cwt/acre
Vitazyme: 300 cwt/acre (+7%)

Comments:  "The Vitazyme treated tubers look very good....  The potatoes on the Vitazyme had fewer small tubers, which made the crop look much bigger going into storage."

"This was the best field on the farm.  It had the best size and the best yield."

Fertilization:  The soil cation balancing system was utilized.  Added fertilizers included nitrogen, sulfur, potassium, boron, and zinc.

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2000

Mars Hill, Maine

Variety:  Monona

Planting date:  May 23, 2000

Row spacing:  36 inches

Soil type:  gravely loam

Previous crop:  oats underseeded with clover

Top killing date:  August 23, 2000

Vitazyme application:  13 oz/acre on July 6, with the fungicide (Manzate 75 DF)

Leaf chlorophyll:

Control: 36.3 SPAD units
Vitazyme: 39.5 SPAD units (+3.2 SPAD units)

Comments:  "Very interesting results.  Vitazyme gave definitely better roots.  The plants looked better all summer, with more even tuber size.  I would like a larger test next year"

Fertilization:  The cation balancing system was used on this field.  Fertilizers added were as follows: P₂O₅ - 75 lb/acre; NH₄NO₃ - 300 lb/acre; (NH₄)₂SO₄ - 250 lb/acre; K₂SO₄ - 400 lb/ace; borax - 15 lb/acre; ZnSO₄ - 35 lb/acre; sulfur - 25 lb/acre.

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2000

Center, Colorado

Variety:  Nugget

Planting date:  May 5, 2000

Soil type:  loamy sand

Row spacing:  alternate 32 in - 36 in (average of 34 in)

Harvest date:  October 12 to 14, 2000

Vitazyme application:  13 oz/acre through the irrigation system at planting, with about 0.7 inch of water

Tuber yield:

Control: 335 cwt/acre
Vitazyme: 370 cwt/acre (+10%)

Income Increase:

+$105.00/acre

Fertilization:  140 lb/acre N, no P or K plus some S applied through the irrigation system; 400 lb/acre FeSO₄, 200 lb/acre MnSO₄, 35 lb/acre ZnSO₄, 20 lb/acre CuSO₄, 0.5 ton/acre compost, plus 1 ton/acre gypsum, all mixed and applied before planting and incorporated into the soil

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2000

Mars Hill, Maine

Variety:  Frito Lay 1625

Planting date:  Vitazyme area: May 28, 2000

Control area: May 22, 2000

Soil type:  gravely loam

Previous crop:  oats

Row spacing:  36 inches

Vitazyme application:  13 oz/acre on the seed pieces at planting with Admire insecticide; 13 oz/acre on the leaves and soil at blossom time.

Tuber yield:

Control: 276,300 lb/acre
Vitazyme: 300,600 lb/acre (+10%)

*Significantly greater than the control at P=0.20 (Tukey's Test).

This yield increase is in spite of six days less growth for the Vitazyme treatment.

Total tubers per acre:

Control: 81,748 tubers
Vitazyme: 103,092 tubers (+26%)

*Significantly greater than the control at P=0.20 (Tukey's Test).

This yield increase is in spite of six days less growth for the Vitazyme treatment.

Chlorophyll increase (average of 30 leaves):

+ 1.3 SPAD units

Fertilization:  1,250 lb/acre of a 10-14-17% N-P₂O₅-K₂O fertilizer

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2000

Mars Hill, Maine

Variety:  Kanona

Planting date:  June 9, 2000

Soil type:  gravely loam

Row spacing:  36 inches

Previous crop:  fallow

Top kill date:  September 12, 2000

Vitazyme application:  13 oz/acre twice, the last half of the season after tuber initiation

Comments:  The farmers stated the following:

"The Vitazyme treated Kanonas definitely had a more uniform size, had more roots, and were definitely better.  At harvest the Vitazyme treated area had at least 2,500 cwt more per acre, probably more like 3,500 cwt."

"This field had the best yield on the farm.  Tuber size was extremely uniform, which allowed them to be killed when more than 50% of them (as high as 70%) were chef size (3 to 4 inches in diameter).  This helped increase total yield."

Fertilization:  1,100 lb/acre of 14-14-14-1.2% N-P₂O₅-K₂O-Mg, with N applied as 50% NH₄NO₃ and 50% (NH₄)₂SO₄

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2001

Bridgewater, Maine

Variety:  Kennebec, for seed

Soil type:  gravely loam

Row spacing:  36 inches

Vitazyme application:  Vitazyme at 13 oz/acre was applied about June 10, after weed kill, on the leaves and soil, abd again at 13 oz/acre at bloom, about July 15.

Comments:  The following facts were noted:

• "It was a very good crop, one of the best Kennebec crops we have had!""

• "The Vitazyme treated tubers has good uniformity of size, has a very good tuber set, and the tuber numbers were much better than usual."

• "There were some 'common scab' defects on tubers from two patrs of the field, but as one moved from the control to the treated portion of the field the scab problem disappeared.

Fertilization:  A percent base saturation approach was used for both areas.

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2001

Presque Isle, Maine

Variety:  Atlantic

Row spacing:  36 inches

Soil type:  gravely loam

Vitazyme application:  (1) 13 oz/acre at 4 to 6 inches height on the leaves and soil;

(2) 13 oz/acre at blossom on the leaves and soil

Tuber yield/2 plants*:

Control: 6.31 lbs
Vitazyme: 8.98 lbs (+42%)

ACA (a 15-0-0% N-P₂O₅-K₂O formulation with Zn-NH₄-acetate): 5.66 lbs (-10%)

*Samples were taken from plants with the same stem number and average vitality, at two locations per treatment.

Fertilization:  All field areas were treated the same except for ACA on one control side.

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2001

Blaine, Maine

Variety:  Russet Burbank

Row spacing:  36 inches

Soil type:  gravely loam

Vitazyme application:  two 13 oz/acre applications on the leaves and soil

Tuber yield/2 plants*:

Control: 3.59 lbs
Vitazyme: 3.90 lbs (+9%)

*Samples were taken from plants with the same stem number and average vitality, at two locations per treatment.

Comments:  "The Vitazyme yields were definitely better than the non-treated yields."

"Dennis was very aware of finding more roots in and on the harvesting equipment.  He kidded me about the trouble all these roots were causing him.  We had two fields this year which yielded over 300 cwt/acre, a very good yield for Aroostook County, an improvement over last year and a big improvement for them.  A relative said that one field was the best Russet Burbank field he had seen this year in Maine."

Fertilization:  the same throughout the field using the base saturation (Albrecht) soil balancing system

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2001

Arkport, New York

Variety:  Redsen

Planting date:  unknown

Row spacing:  34 inches

Soil type:  muck (organic)

Harvest date:  unknown

Vitazyme application:  Two application rates of Vitazyme were used:

(1) Vitazyme at 16 oz/acre

(2) Vitazyme at 7 oz/acre

Tuber yield:

Control: 18,080 lb/acre
Vitazyme, 16 oz/acre: 19,120 lb/acre (+6%)

Vitazyme, 7 oz/acre: 19,820 lb/acre (+10%)

Income increase:

Vitazyme, 16 oz/acre: +$124.80/acre

Vitazyme, 7 oz/acre: 19,820 lb/acre: +$208.80/acre

Fertilization:  1,100 lb/acre of an 8-8-8% N-P₂O₅-K₂O liquid fertilizer (88 lb/acre of each nutrient), placed 2 inches below and 2 inches beside the furrow.  Midseason the entire field was sidedressed with 250 lb/acre of urea of urea (115 lb/acre N).

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2001

Presque Isle, Maine

Variety:  Russet Burbank

Row spacing:  36 inches

Soil type:  gravely loam

Vitazyme application:  one foliar/soil application at 13 oz/acre, or 26 oz/acre at early bloom (at row fill)

Leaf chlorophyll*:

Control: 48.0 SPAD units
Vitazyme, 13 oz/acre: 50.9 SPAD units (+2.9 SPAD units)

*Average of 30 representative leaves per treatment.

Tuber yield/2 plants*:

Control: 3.16 lbs
Vitazyme, 13 oz/acre: 5.66 lbs (+79%)

Vitazyme, 26 oz/acre: 6.28 lbs (+99%)

*Samples were taken from plants with the same stem number and average vitality, at two locations per treatment.

Fertilization:  equal over all areas

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2001

Easton, Maine

Variety:  Shepody, Russet Burbank

Row spacing:  36 inches

Soil type:  gravely loam

Vitazyme application: 

Shepody:  Strip 1, 20 oz/acre on July 2 on the leaves and soil

Strip 2, 13 oz/acre on July 27, and 13 oz/acre on August 7 on the leaves and soil

Russet Burbank:  13 oz/acre on June 20, and 13 oz/acre on August 7

Russet Burbank

Tuber yield/2 plants*:

Control: 2.30 lbs
Vitazyme: 3.17 lbs (+38%)

*Samples were taken from plants with the same stem number and average vitality, at two locations per treatment.

Shepody

Tuber yield/2 plants*:

Control: 2.59 lbs
Vitazyme, 13 oz/acre: 3.22 lbs (+24%)

Vitazyme, 26 oz/acre: 2.65 lbs (+2%)

*Samples were taken from plants with the same stem number and average vitality, at two locations per treatment.

Comments:  "The Shepodys were at least 50 cwt/acre better than the non-treated.  There was better size and more uniformity in size."

"The Vitazyme treated tubers had better, more uniform size."

Fertilization:  unknown

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2002

Houlton, Maine

Variety:  Superior

Planting date:  unknown

Row width:  36 inches

Soil type:  gravely loam

Harvest date:  unknown

Vitazyme application:  13 oz/acre on the seeds at planting;  13 oz/acre on the leaves and soil at blossom time

Tuber yield:

Control: 264.0 cwt/acre
Vitazyme: 274.5 cwt/acre (+4%)

Income Increase:

+$73.50/acre

Fertilization:  unknown

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2002

Houlton, Maine

Variety:  Dark Red Norlin

Planting rate:  17,500 plants/acre

Row width:  36 inches

In-row spacing:  8 inches

Soil type:  gravely loam

Vitazyme application:  13 oz/acre on the seeds pieces at planting; 13 oz/acre on the leaves and soil in July

Tuber yield:

Control: 242.4 cwt/acre
Vitazyme: 333.4 cwt/acre (+38%)

Income Increase:

+$637.00/acre

Fertilization:  unknown

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2002

Grafton, North Dakota

Variety:  Frito Lay 1533

Planting date:  unknown

Row width:  36 inches

In-row spacing:  8 to 9 inches

Soil type:  sandy clay loam

Vitazyme application:  13 oz/acre on the seed pieces at planting;  13 oz/acre on the leaves and soil at flowering

Tuber yield:

Control: 321.5 cwt/acre
Vitazyme: 329.2 cwt/acre (+2.4%)

Income Increase:

+$53.90/acre

Fertilization:  unknown

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2002

Bongsung-Ri, Aeyoul-Eup, Jeju-City, Korea

Variety:  Daeji

Planting date:  Autumn of 1999, spring of 2001, fall of 2001

Soil fertility:  unknown

Soil type:  unknown

Vitazyme application:  (1) 26 oz/acre as a 1:3,000 dilution, sprayed on the leaves and soil at 25 cm plant height;  (2) the same application at early bloom

Fall 1999 Planting

Plant height:

Control: 66.4 cm
Vitazyme: 75.7 cm (+14%)

Stem length:

Control: 44.7 cm
Vitazyme: 54.1 cm (+21%)

Spring 2001 Planting

Total tuber yield:

Control: 1,290 kg of tubers/100 m²
Vitazyme: 1,590 kg of tubers/100 m² (+23%)

Tubers 31 to 250 g:

Control: 1,103 kg of tubers/100 m²
Vitazyme: 1,321 kg of tubers/100 m² (+20%)

Tubers over 250 g:

Control: 0 kg of tubers/100 m²
Vitazyme: 56 of tubers/100 m²

Fall 2001 Planting

Total tuber yield:

Control: 2,172 kg of tubers/100 m²
Vitazyme: 2,908 kg of tubers/100 m² (+34%)

Tubers 31 to 250 g:

Control: 2,103 kg of tubers/100 m²
Vitazyme: 2,548 kg of tubers/100 m² (+21%)

Tubers over 250 g:

Control: 0 kg of tubers/100 m²
Vitazyme: 219 of tubers/100 m²

Fertilization:  unknown

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2002

Center, Colorado

Variety:  Yukon Gold

Planting date:  June 5, 2002

Row spacing:  34 inches

In-row spacing:  10-inch spacing

Soil type:  sandy loam

Harvest date:  September 1, 2002

Irrigation:  center-pivot

Vitazyme application:  (1) 13 oz/acre soon after planting, through the irrigation system;

(2) 13 oz/acre at the early hook stage

Tuber yield:

Control: 278 cwt/acre
Vitazyme: 285 cwt/acre (+3%)

Potato income:

Control: $2,780/acre
Vitazyme: $2,850/acre (+$70.00/acre)

Fertilization:  unknown

Date

Location

Cultural System

Vitazyme/Fertilization

Results

2002

Saguache, Colorado

Variety:  Yukon Gold

Planting date:  June 10, 2002

Row spacing:  34 inches

In-row spacing:  10-inch spacing

Soil type:  sandy loam

Harvest date:  September 20, 2002