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Garden Soil Testing: What you should know

Garden Soil Testing: What you should know. Dean Volenberg Agricultural Educator –Door County. Taking A Soil Sample. Use a soil probe or garden trowel Sample to a depth of 6 inches Remove organic matter from surface before sampling Sample the area in a W or Z pattern. Taking A Soil Sample.

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Garden Soil Testing: What you should know

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  1. Garden Soil Testing: What you should know Dean Volenberg Agricultural Educator –Door County

  2. Taking A Soil Sample • Use a soil probe or garden trowel • Sample to a depth of 6 inches • Remove organic matter from surface before sampling • Sample the area in a W or Z pattern

  3. Taking A Soil Sample • Use a soil probe or garden trowel • Sample to a depth of 6 inches • Remove organic matter from surface before sampling • Sample the area in a W or Z pattern

  4. Taking a Soil Sample • Put samples in a clean plastic pail • Remove large stones or other large foreign objects • Mix sample thoroughly

  5. Taking a Soil Sample • Approximately 2 cups of soil needed • Drop sample off at UW-Extension office • Results available in 2 weeks • If garden area heterogeneous then sample areas separately

  6. Why add Potash (K2O) • Soil test in sufficient range • 120 ppm • To convert to pounds/acre multiple by 2 • 120 x 2 = 240 pounds K2O/acre • 1 acre = 43,560 ft2 • 240 pounds K2O/acre/43,560 ft2 = 0.0055 pounds K2O ft2 • 0.0055 pounds K2O ft2 x 100 = 0.55 pounds K2O/100ft2 • Vegetable crops will remove K2O

  7. Nutrient Removal per Acre

  8. How much K2O remains at end of growing season if no K2O added? LOW VeryLOW LOW VeryLOW

  9. Garden Fertilizers % Nitrogen % P2O5 % K2O (Potash)

  10. Common Garden Fertilizers 0.4 / 0.1 = If soil test suggests 0.4 lbs N/100 ft2

  11. Nutrient Content of Solid Manure Apply manure in the fall or early spring, a minimum of 120 days must pass after manure application before the harvest of any vegetable crop.

  12. Green Manures • Increase soil organic matter • Reduces leaching of nutrients • Reduces soil erosion • Legumes can increase N content of soil • Decreases weed growth • Improves soil tilth

  13. Questions Other Lunch & Learn Topics May 28Gardening In Small Spaces: Plant selection and crop scheduling June 4Mulches And Other Tools: How to spend more time gardening and less time weeding June 18Pest Management In The Garden: Know your friends and foe September (TBA)Gardening At The End Of Season: Mulches, manures and tricks to extend the season

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