Click on “Download PDF” for the PDF version or on the title for the HTML version.

If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options.

Measurement of Combine Losses for Corn and Soybeans in Brazil

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Applied Engineering in Agriculture. 30(6): 841-855. (doi: 10.13031/aea.30.10360) @2014
Authors:   Marvin R. Paulsen, Francisco A.C. Pinto, Darly G. de Sena Jr., Rodrigo S. Zandonadi, Solenir Ruffato, Anderson Gomide Costa, Vilmar A. Ragagnin, Mary-Grace C. Danao
Keywords:   Brazil, Combines, Corn, Harvest losses, Post-harvest losses, Soybeans.

Abstract. Harvest losses were determined for combines harvesting soybeans and corn in Brazil. Estimated soybean yields adjusted to 13% moisture ranged from 2663 to 4861 kg/ha. Pre-harvest losses ranged from 1.0 to 13.6 kg/ha. Total soybean combine losses ranged from 47.4 to 260.5 kg/ha (1.2% to 5.5% of yield). The headers were the largest contributors to losses with 31 to 247 kg/ha. Shatter losses were the primary cause of losses in the headers and they increased markedly as harvest moistures decreased below 13%. A reduction in ground speed would have enabled soybean cutterbars to run closer to the ground and reduce stubble losses. An achievable reduction in combine harvest losses of 120 kg/ha (2 bags/ha) has an operator hourly value of USD $238 to $277/h.

Estimated corn yield adjusted to 14% moisture ranged from 6,937 to 11,044 kg/ha. Pre-harvest ear losses ranged from 0 to 42 kg/ha. Total corn combine losses ranged from 36.2 to 320.6 kg/ha (0.3% to 3.6% of yield). Of this loss, header ear loss accounted for the largest portion with 0 to 237 kg/ha. Reduction in ground speed would benefit separation losses in corn. But not surprisingly, lodged corn can increase header ear losses by more than any other source of loss.

(Download PDF)    (Export to EndNotes)