Farmers can educate themselves on microirrigation practices with a 200-page publication from USDA’s National Resources Conservation Service. Microirrigation includes subsurface-drip irrigation, which is used for root-level water delivery to crops such as cotton and corn. Featured subjects include types of systems; emitter hydraulics; designs of lateral lines and manifolds; filter selection; minimum flushing velocity; the use of field data; economic pipe size selection; and much more. The subject is also featured in the National Engineering Handbook. For more information, go to www.nrcs.usda.gov.