Servsafe chapter 3 pdf

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Pesticide and fertilizer recommendations often are made on a pounds-per-acre or tons-per-acre basis for field production. However, greenhouse and nursery operators, landscape professionals and orchardists often must convert these recommendations to smaller areas, such as row feet or square feet per tree or per pot. Pints, cups, ounces, tablespoons and teaspoons often are the common units of measure. Metric units of measure can further complicate conversion.

This publication is designed to help growers make these calculations and conversions and to provide other data useful in the management, planning and operation of horticultural enterprises. A number of formulas for calculating fertilizer application rates on a parts-per-million basis are given. Tables for fertilizer injector calibration using a conductivity meter, as well as pre-plant application rates for various soil mix components and amendments, also are provided. A brief explanation of how each table is used is provided. Tables 4 through 7 help determine correct application rates for various pesticides.

Directions call for a 1:200 dilution. To prepare 1 gal of solution would require 4 tsp of material. To prepare 5 gal of solution would require 3 fl oz material. Tables 8 through 9 help determine the correct application rates for fertilizers when nutrition recommendations are based on fertilizer weight. Any of the materials listed in the first column can be used at the rates shown below.

High Rates, not desirable in row fertilization, are omitted in the table. You wish to apply calcium nitrate at the rate of 500 lbs per acre. It weighs approximately 19 oz per pt. Clay flower pots are frequently used for fertilizer measurement by greenhouse operators. The above shows average weights of several representative fertilizers as measured by standard clay pots when level full. The 3-inch standard is considered to contain 8 fl oz or 1 cup.

Since the actual pot size varies with the manufacturer and the volume of a given weight of fertilizer varies with moisture and compaction, deviations of 10 percent may be expected but up to 40 percent may occur. Tables 10 through 14 help determine the correct application rates for fertilizers with various analysis when nutrition recommendations are based on parts per million and fertilizer injectors are used to deliver liquid plant fertilizer. Table 12 is designed to help growers calibrate their injectors. 4 lb are needed for 1000 gal water. 20 percent multiplied by 75 is 15, which is the ppm of Nitrogen in 1 oz of Ammonium Sulfate per 100 gal of water. Adapted from Grace Horticultural Products.