July 25, 2011

Making Water Work For Growing

Many articles have been written over the past few years on water quality and the need for growers to adapt to their individual water supply. Most of these articles have been written by university or industry experts, and they have done a tremendous job explaining the scientific aspects of various water types and how the chemistry of these water types affect the pH of the soil, nutrient availability and overall plant quality. My favorite reference source on this subject is a book titled “Understanding pH Management,” by Bill Argo and Paul Fisher published by Greenhouse Grower. Many frequently asked questions by our grower customers have focused on soil pH and plant nutrition. Countless callers have a question like this: “I grow in soil brand X, my salesman says the pH is 5.8 to 6.2 straight from the bag, I feed with 20-10-20, and my water pH is 6.0. So why […]

Read More

April 25, 2011

Soluble Salts: Don’t Get Burned

As discussed in our previous article last month, high soluble salts can accumulate in the root zone when there is poor quality (high salt) irrigation water or excessive fertilizer input. Understanding which bedding plants are most sensitive can aid in crop selection and in management practices such as leaching. At Cornell University we conducted an experiment to determine the response of 14 common bedding plants to increasing levels of high soluble salts. In this article we detail the growth effects on the studied species, provide a classification grouping for response to extreme salt stress and list corrective actions for high salts. Bedding Plants For Salt Sensitivity Table 1 ranks the bedding plants we studied for growth and height response to high soluble salt levels (PourThru EC 7.1). The irrigation water used for this treatment contained table salt (460 ppm Na + 710 ppm Cl) and had an EC of 2.4. […]

Read More
[gravityform id="35" title="false" description="false"]