Chelates, primarily iron (Fe), play important roles in the production of Fe-sensitive crops when grown in alkaline soils. In addition, chelates of the element manganese (Mn) and zinc (Zn) have been of value under similar soil conditions. The form of the chelate and its method of application are important factors determining their effectiveness in providing…
Humic acid is not a specifically defined chemical substance, but is “a complex mixture of many different acids containing carboxyl and phenolate groups so that the mixture behaves functionally as a dibasic acid or, occasionally, as a tribasic acid” (en.Wikipedia.org). The physiochemical properties of humic acid will be determined by the substance (soil, peat, coal…
Hunic acid is becoming a commonly added ingredient to nutrient solution formulation and nutrient supplement products with the expectation of significant positive plant response. Humic acid is not a specifically defined chemical substance, but is “a complex mixture of many different acids containing carboxyl and phenolate groups so that the mixture behaves functionally as a…
Hydroponics has had a long history of development and use with varying commercial success. Today, hydroponics has a bright future. Unfortunately, few are engaged in method development, designing growing systems that can be used by the commercial grower as well as the home gardener.
Dr. J. Benton Jones has written extensively on the topics of soil fertility and plant nutrition over his professional career. Click here to see a list of available books and DVDs.