CPAg case studies
CPAg · Put your knowledge to work in context.
The Certified Professional Agronomist (CPAg) is a professional credential associated with the American Society of Agronomy (ASA), one of the Science Societies whose sites are linked from agronomy.org. Candidates typically encounter the CPAg program through ASA's certification navigation, alongside the society's Certified Crop Advisers link. This page is an independent study resource for candidates preparing for the CPAg examination; it is not affiliated with, endorsed by, or operated by ASA or the Science Societies. Because the ASA CPAg exam page could not be retrieved during our source check (the URL returned a page-not-found error), we cannot publish verified exam specifications. The CPAg case studies are 5 cases and about 2,704 words.
1Sidedress Nitrogen After Manure and Rain on a Sandy Loam
A 90-acre field of corn in central Iowa is at V5 on June 5. The field is a sandy loam with 2.1% organic matter and a history of early-season nitrate loss.
584 words, about 3 min2Cotton Salinity, Sodicity, and a Gypsum Recommendation
A 120-acre furrow-irrigated cotton field in the Texas High Plains has been in continuous cotton for six years. soil test shows ECe 3.8 dS/m, ESP 12%, CEC 18 cmol/kg, pH 8.1, and 1.2% organic matter.
575 words, about 3 min3Fusarium Head Blight Timing and Tank-Mix Decision in Wheat
A 60-acre field of winter wheat in eastern Arkansas is at Feekes 10.5.1 (beginning flowering) on April 22. The field was no-tilled into corn residue, and the variety is moderately susceptible to Fusarium head blight (FHB).
524 words, about 3 min4Declining Alfalfa Stand: Keep, Interseed, or Rotate?
A 40-acre alfalfa field in Wisconsin was seeded four years ago. On May 1, a stand assessment finds 7 plants/ft2 and 34 stems/ft2, with 25% grass and dandelion cover.
504 words, about 3 min5Cereal Rye Cover Crop Termination Before No-Till Corn
A 50-acre field in southeastern Pennsylvania is planned for no-till corn on May 12. A cereal rye cover crop drilled last September is now 5 ft tall with about 8,000 lb/ac dry biomass.
517 words, about 3 min