i am working on Nitrate nitrogen and phosphorus dynamic in the soil and designed the field experiment of winter wheat and summer maize crops rotation for five years, i need to know the installation procedure/protocol of lysimeter, Tensiometer, EM50 and Reda?
another question is how i should detect the soil cracks up to the depth of 100 cm soil cracks?
doi:10.2134/agronj1996.00021962008800020023x
Design, Construction, and Installation of an Intact Soil Core Lysimeter
Jeffrey W. Moyer ,
Louis S. Saporito and
Rhonda R. Janke
+ Author Affiliations
Abstract
An intact soil core lysimeter with its insertion device and process was developed to facilitate the collection of leachate and soil water samples from a series of field plots in eastern Pennsylvania. This design was developed to minimize disturbance of the soil within and around the lysimeter. The lysimeter was constructed of 76.2-cm-diam. steel well casing with a 7.9-mm wall thickness. The casings were cut to lengths of 1.15 and 0.75 m and were inserted by means of direct downward force to a depth of 1 m. An access hole 38 cm in diameter by 161 cm deep was then augered next to the inserted casing for the installation of a collection device beneath and beside the cylinder. The soil-filled cylinder was removed and set on a prefabricated base and welded in place. The prefabricated base had drain holes and a fitting for attachment of the collection device. The collection unit was attached and the entire lysimeter was reinserted into the cavity. Leachate caught in the collection device was removed by. pumping through attached surface tubes alongside the cylinder. This design has proved to be efficient and cost-effective. The insertion method kept soil compaction to a minimum while maintaining a watertight seal between the casing and soil core.
This design was useful for water quality measurements in Rodale Farmer Systems Trial.
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