The URL can be used to link to this page

Home My WebLink AboutX2021-0809 - Misc (4) 4741 East Hunter Ave., Ste. A Anaheim CA 92807 (714) 282‐8777 (714) 282‐8575 fax www.waypointanalytical.com Anaheim Office Lab No: 22-091-0001 April 7, 2022 Apelinc Landscape 5000 Birch St., Suite 9300 Newport Beach, CA 92660-2244 Attn: Vic Project: Hoag Campus Attached are the results of the analysis performed on a soil sample that was collected from the above mentioned project site by the client and received by our laboratory on 04/01/2022. This sample was analyzed for nutrient levels and horticultural suitability in preparation for a new landscape installation. Analytical Results The reaction of the soil is slightly alkaline at 7.5 on the pH scale, which could cause plants that are sensitive to alkaline soil conditions to show yellowing beginning with the younger growth. Qualitative lime is favorably low indicating that the pH is weakly buffered in the alkaline range. Incorporating soil sulfur to a depth of 6 inches will adjust the pH downward to the depth of incorporation. That change will happen slowly and plants that are sensitive to alkaline soil conditions should be avoided. Salinity (ECe) is safely low at 1.1 dS/m. Soluble sodium is slightly elevated at 9.7 meq/L and the sodium present is not properly balanced by calcium and magnesium as indicated by the elevated sodium adsorption ratio (SAR) of 6.07. This imbalance could negatively affect soil structure and water infiltration. The soluble sodium present could bother very salt sensitive plants if sodium is not reduced by employing thorough initial irrigations after planting. Gypsum will supply additional soluble calcium to help balance and displace sodium. Boron is safely low for general ornamental plants and may be below optimum for plant nutritional purposes. Irrigation water in Southern California often supplies sufficient boron to meet plant nutritional requirements for that nutrient. However, if boron is low in the irrigation water and/or plants show symptoms of boron deficiency after they are well established, consider an application of a product containing boron at the manufacturer’s label rate. Boron deficiency symptoms often include stunted or deformed younger growth and “tight” internodes. In terms of fertility, calcium and magnesium are sufficient while the remaining nutrients are low. Comments It was noted by the client that the planned plant palette is made up of “drought tolerant” plants. Although this is good to know in regards to irrigation scheduling, it does not necessarily have a bearing on amending of the soil. This is because “drought tolerant” may mean drought tolerant general ornamentals such as crepe myrtles, Rhaphiolepis, etc. or it could refer to California native plants. Of course, general ornamentals and California natives have different soil requirements and this could affect the amendment recommendations. The recommendations provided below assume that the plants at this site will be drought tolerant general ornamentals. If that is not the case, please feel free to contact us for updated planting recommendations. Page 1 of 4 4741 East Hunter Ave., Ste. A Anaheim CA 92807 (714) 282‐8777 (714) 282‐8575 fax www.waypointanalytical.com Page 2 Apelinc Landscape April 7, 2022 Recommendations Surface Soil Preparation for Groundcover and Mass planting If feasible, prior to amending the areas where severe compaction exists, the surface soil should be ripped or tilled to a 9-inch depth. Uniformly broadcast and blend the following with existing soil to a 6-inch depth. Materials Amount per 1000 sq.ft. Nitrogen fortified organic amendment 4 cu. yards (compost* or redwood or fir sawdust) Sulfur 6 lbs. Gypsum 15 lbs. 6-24-24 XB™ 18 lbs. *Rates and fertilizers may have to be adjusted depending on analysis of selected compost. Tree and Shrub Planting Guidelines 1. Excavate planting pits at least twice the diameter of the rootball. 2. The top of the rootball should be at or slightly above final grade. 3. To improve soil chemistry, uniformly blend 1 lb. of iron sulfate per cubic yard of backfill soil. Handle iron sulfate with caution since it will severely stain moist concrete. 4. Organic material is not required in the backfill; however, if you wish, the amended surface soil or a soil blend consisting of no more than 20% by volume organic matter can be placed in the upper 12 inches of backfill only. Soil below this depth should not contain any added organic matter because of the threat of plant disease and/or anaerobic soil conditions developing. 5. Place slow release fertilizer tablets in the upper 12 inches of backfill at manufacturer’s recommended rates. If fertilizer amended soil is used as a backfill the addition of slow release fertilizer tablets is not necessary 6. Do not cover the original rootball with other soil. Ideally, a temporary soil berm is often constructed around the outer edge of the rootball to help channel water into the rootball and then into surrounding soil until roots are established in the backfill and the rootball is no longer the sole source of water for the plants. 7. Ideally, a weed and turf free zone, preferably 2-3 ft. in diameter, should be maintained just beyond the diameter of the planting hole. A 2-4 inch deep layer of coarse mulch can be placed around the tree or shrub; mulch should be kept a minimum 4-6 inches from the trunk. Page 2 of 4 4741 East Hunter Ave., Ste. A Anaheim CA 92807 (714) 282‐8777 (714) 282‐8575 fax www.waypointanalytical.com Page 3 Apelinc Landscape April 7, 2022 Maintenance Fertilization Uniformly broadcast sulfur coated urea at the rate of 5 lbs. per 1000 sq. ft. The first application should occur approximately 30 days after installation, with repeat applications every 60-90 days or as growth and color dictate. In early fall and spring, substitute a complete fertilizer such as 16-6-8, or equal, for the sulfur coated urea at the rate of 6 lbs. per 1000 sq. ft. to ensure continuing supplies of phosphorus and potassium. Tree and shrub plantings can be maintained with the above fertilizers; however, the frequency between applications should be every 120 days, with the first application 90 days after planting. Follow each fertilization with a thorough irrigation. When plants have become well established, fertilizer applications can be less frequent. As noted above, some of the micronutrients are below optimum. When these nutrients are low, especially in an alkaline soil, deficiencies can sometimes show in the plants. If deficiencies show once plants have become established, they may be addressed upon the first sign of deficiency. Symptoms of manganese deficiency may be seen as a general loss of color in the young leaves, followed by yellowing between veins and brownish-black spots appearing. Iron and zinc deficiency symptoms are often characterized by yellow, almost white, interveinal chlorosis on the youngest growth. If these symptoms are apparent once plants are established, then application of iron, zinc, and/or manganese chelate at the manufacturer’s label rate may improve appearance. Chelates are generally more effective on alkaline soils than some of the other forms of trace elements. If we can be of any further assistance, please feel free to contact us. Joe Kiefer, CCA Page 3 of 4 Sample Id :Site Soil Composite SOIL ANALYSIS Send To:Project : Apelinc Landscape 5000 Birch St., Suite 9300 Newport Beach, CA 92660-2244 Hoag Campus 22-091-0001 00975 04/06/2022 04/01/2022 1 of 1 33324 Report No : Cust No : Date Printed : Date Received : Page : Lab Number : EXTRACTABLE NUTRIENTS NH4-N Total Exchangeable Cations(TEC) Very Low Low Medium Optimum Very High 283 SOIL TEST RATINGSSufficiency Factor NO3-N meq/kg208 10 ppm 2 ppm473 709 0.3 0.4 0.5 ppm ppm 10 113 ppm12 5.9 meq/L 2.0 1181 0.07 ppm 0.2 236 Result Available-N Phosphorus (P) - Olsen Potassium (K) Boron (B) - sat. ext. Sulfate - sat. ext. Exch Aluminum Iron (Fe) 10 ppm 0.1 236 Manganese (Mn) 5 ppm 0.3 473 Zinc (Zn) 5 ppm 0.6 851 Copper (Cu) 0.9 ppm 0.4 709 Magnesium - sat. ext.1.8 meq/L Magnesium (Mg) 629 ppm 1.7 1181 Calcium - sat. ext. 3.3 meq/L Calcium (Ca) 2750 ppm 1.0 1181 Potassium - sat. ext. 0.1 meq/L Cu, Zn, Mn and Fe were analyzed by DTPA extract. Weight Percent of Sample Passing 2mm Screen Half Sat PARTICLE SIZE ANALYSIS 19 % Gravel Sand Coarse 5-12 Fine 2-5 Very Coarse 1-2 Coarse 0.5-1 Med. to Very Fine 0.05-0.5 Organic Matter Silt .002-.05 Clay 0-.002 USDA Soil Classification Moderately Alkaline Strongly Acidic Moderately Acidic Slightly Acidic Slightly Alkaline Strongly Alkaline Low Neutral 1465 Qualitative LimeResult pH 7.5 s.u. SATURATION EXTRACT - PLANT SUITABILITY Effect on Plant Growth Only Tolerant Crops Satisfactory Few Crops Survive Result dS/m ppm meq/L Boron (B) Sodium Adsorption Ratio (SAR) * Salinity (ECe) Sodium (Na) Chloride (Cl) Carbonate (CO3) Bicarbonate (HCO3) Fluoride (F) 1.1 6.07 0.07 9.7 179 662 43 688 Many Crops RestrictedNegligibleSensitive Crops Restricted * Structure and water infiltration of mineral soils potentially adversely affected at SAR values higher than 6. Test Test Test Graphical interpretation is a general guide. Optimum levels will vary by crop and objectives. Page 4 of 4