By

Ray Ward, Ph.D, CCA, Ward Laboratories, INC. Founder
Ward Laboratories uses soil test methods developed and calibrated by land grant universities.  Standard methods are published in several manuals.  We prefer to use standard methods that have performed well for many years. Soil pH & EC: We use a 1:1 water pH.  This means we measure 10 grams of soil and 10 mL of...
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1. Soil Respiration The first part of the Haney Soil Health Test is soil respiration test or CO2 24 hr. burst test is an indicator of soil microbial biomass.  When we receive the sample we dry the soil over night at 110 F and then crush the soil and collect soil that passes through a...
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Reprint From June 2003 Ward Letter. Ward Laboratories professionals often get questions about surface urea application and UAN solutions. Urea is a dry fertilizer that dissolves with water after application creating urease enzyme activity that is naturally present in all soils at some level. Urease enzyme converts urea to ammonia (NH3) and bicarbonate (HCO3) in...
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