Pesticide and fertilizer recommendations often are made on a pounds-per-acre or tons-per-acre basis for field production. Formulas for calculating variously shaped areas.Formulas for calculating greenhouse volume.Areas covered in square feet at various depths.Cubic yards of soil needed at various depths and areas.Volume of water delivered - by size of hose.Times required to mow or trim lawn areas.Number of plants per acre at various spacings.Number of bedding/groundcover plants required at various spacing for landscape planting.Estimated number of plants to fill 100 ft2 bed area for square (row) and triangular (equilateral) planting patterns using 4 to 14 inch spacing distances.Coverage estimates for perlite, peat, topsoil and straw.Number of nursery containers that can be filled from 1 yd 3 of soil mix.Number of pots per bushel and per cubic yard of soil mix.Cornell Peat-lite Mix A for seedlings, bedding plants and potted plants.Pre-plant fertilizer sources and rates of application.Dilution/conversion chart for various chemical growth regulators.Approximate amount of materials required to change pH of potting mixes.Materials, rates necessary to lower the pH level of greenhouse potting substrate 0.5 to 1.0 units.Rates in lb/yd 3 (kg/m 3) for incorporation of three of the most popular formulations of Nutricote into greenhouse root substrates.Osmocote® controlled-release fertilizers and their release periods.
Conversion factors among electrical conductivity (EC) units.Parts per million of desired nutrient to ounces of fertilizer carrier in 100 gallons of water (or grams in 1 liter) and vice versa.Injector calibration with a conductivity meter.Injection ratios and nitrogen concentrations for constant fertilization.Element concentrations for pounds soluble fertilizer in 1000 gallons (U.S.) water.Fertilizer weight as measured by standard pot size.Fertilizer conversions for specified square feet and row areas.Equivalent quantities of liquid materials (emulsion concentrates, etc.) for various quantities of water based on pints per 100 gallons.Equivalent quantities of dry materials (wettable powders) for various quantities of water based on recommended pounds per 100 gallons.Dilution of liquid pesticides at various concentrations.Equivalents for liquid measure (volume).
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