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Subsoil Lime Injector¹

ABSTRACT

A technique was developed for applying suspended lime along the sides of a vertical slit in the soil formed by a narrow, blade-like tillage tool extending about 18 cm below the plow layer. Dolomitic limestone was kept in suspension without agitation using a liquid polymer dispersant and was successfully injected into the subsoil 18 to 36 cm deep using a slitter blade attached to a chisel. The implement required less drawbar force than a chisel operated at the same depth. The implement and technique may also be useful for application of other materials into the subsoil.

¹ Contribution from IFAS, University of Florida, Agron. Dep., Agric. Res. and Ed. Center, Belle Glade, FL 33430. Journal Series no. 4031.

² Assistant Professor in Sugarcane Nutrition/Soil Fertility, University of Florida and Agricultural Engineer, USDA-ARS, Nat. Tillage Machinery Lab., Auburn, AL 36830, respectively.

Received for publication July 20, 1982. Accepted for publication October 15, 1982.