The USDA Plant Hardiness Zone Map

This map is the standard by which gardeners and growers can determine which plants are most likely to thrive at a given location. Based on the average annual minimum winter temperature. For more information you can visit the USDA Agriculture Research Service here...

Nutrient Deficiencies

To Obtain Any Desired PPM Concentration

To obtain any desired PPM concentration, merely multiply the 100 PPM figures by the PPM desired. For example, to obtain 150 PPM concentration, multiply the 100 PPM figure by 1.50.


Concentration Wanted: 150 PPM Nitrogen
Injector Ratio:1:200
Nitrogen %:20% (20-20-20)
Multiply 13.50 (which is the ounces per gallon dosage for 100 PPM using a 20% Nitrogen fertilizer and using a 1:200 ratio injector) by 1.50 (150 PPM).
Answer: 20.25 ounces per gallon = 150 PPM Nitrogen concentration.
To convert ounces/gallon to grams/liter, multiply ounces by 7.5.

Click here, for Injection Tables for 100 PPM.

Terminology Used in Horticulture

Links to outside sources for help in Crop Management:

Growing Under Cover
Growing Growers: Drip Irrigation Basics