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  • Author or Editor: G.L. Klinaaman x
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Lysimeters have been used extensively in the study of soil water and the movement of compounds in solution. In the management of landscape plantings where the use of various fertilizer application methods is common, loss of NO3-N from the fertilizer source may limit plant growth and be less cost-effective. During a study examining the influence of mulch type (cottonseed hulls, cypress wood, pine bark, and pine straw) and fertilizer application method (granular, liquid, and time-release), a simple lysimeter was constructed to examine NO3-N loss under normal irrigation and cultural practices in annual beds. Losses of large quantities of NO3-N were initially seen in all treatments during the 1st week followed by a gradual decline to the study's end. Liquid and time-release fertilization methods contained NO3-N as a partial source of N and limited plant growth due to early rapid N loss. Granular fertilizer contained no NO3-N source and demonstrated the greatest plant growth at the lowest cost per square meter.

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