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4. Moisture content (% water, wet weight basis) at time of transport to use site <br />Reason: Moisture content will affect dust during spreading and transport. Moisture content will <br />influence value of compost per unit weight; for example, knowledge of moisture content would <br />help in comparing the price of two composts with different moisture content. <br />5. Bulk density (pounds, per cubic yard, wet and dry basis) <br />Reas : Used to assess the amount of compost a particular transport vehicle can hold. Also, if <br />the product is priced by volume, the bulk density is needed to determine the application rate of <br />nutrients or other constituents that have been determined on a weight basis. <br />6. Screen size or maximum particle size (for example, 1/2 inch) <br />Reason: Needed to determine suitability for crops where very fine seedbed is needed. Also may <br />affect application uniformity with some spreader types. <br />7. Organic matter content (% dry weight basis) <br />Reason: Related to influence of compost on soil structure and water -holding capacity. May be of <br />value to some users in determining -rate of application. <br />8. Salinity (dS/m or o/cm in 5:1 water extract an% soluble salts, dry weight basis) <br />Reason: Too much salinity will be detrimental to plant growth. Maximum tolerable salinity <br />level will depend on plant species, irrigation water and soil salinity, amount of leaching due to <br />rain and irrigation, and compost application rate. <br />9. pH <br />Reason: This measure is commonly used to indicate the degree of acidity or alkalinity. <br />Composting takes place with pH levels between .5.5 and 8.0. A good quality compost should <br />have a pH in the neutral to slightly alkaline range between 6.5 and 8.0. <br />10. Total N, P, and K (% N, P2Os, K2O dry weight basis and as is basis as required by <br />CaliforniaDepartment of Food and Agriculture for registered products.) <br />Reason: Allow user to estimate total N, P, and K application rates. <br />Llete- In compliance with state of California Fertilizing Materials Laws and Regulations, <br />products (including composts) sold u4th nutrient claimsbe registered,! and the product rr' <br />information muscontain ! guaranteed analysis format st! _ I 'rCalifornia <br />Code of Regulations, Section 2303 as required by Section 14631 of the Food and Agricultural <br />Code. 7his informationbe provided !/ rr cornposts classifted I 'agricultural minerals" <br />(N + available P20, + soluble K20 < 5%) and for those classified as commercial fertilizers (N <br />available P20,soluble/) <br />V, <br />