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Houston, TX, United States

Mathanker S.K.,University of Illinois at Urbana - Champaign | Buss J.C.,John Deere | Gan H.,University of Illinois at Urbana - Champaign | Larsen J.F.,BP Biofuels North America | And 2 more authors.
Computers and Electronics in Agriculture | Year: 2015

Napiergrass, which resembles sugarcane in stature and cultivation practices, is emerging as a candidate bioenergy crop. However, limited studies investigating harvesting and yield sensing of napiergrass are available. This study investigated stem-bending force, and the hydraulic pressures of basecutter, chopper and elevator drives in a John Deere 3522 sugarcane billet harvester as indicators of napiergrass yield. The coefficients of determination (R2) between napiergrass yield and hydraulic pressures were 0.73, 0.88 and 0.81, respectively for the basecutter, chopper and elevator drives. The highest correlation (R2=0.92) was found between stem-bending force and napiergrass yield. The yield prediction errors were 4.9% and 8.6% for the calibration and validation plots with the stem-bending force yield sensor. Cross-validation, in which each harvested row was treated as a data point, showed that the average yield prediction errors were 10.9% and 11.8% for the calibration and validation data sets. Yield maps were also generated employing the stem-bending yield sensor. In addition, it was expected that the stem-bending yield sensor could be utilized to control harvester operation such as travel speed. Further studies would be needed to extend the stem-bending concept to other thick stemmed crops. © 2015 Elsevier B.V. Source


Sandhu H.S.,University of Florida | Gilbert R.A.,University of Florida | Comstock J.C.,U.S. Department of Agriculture | Gordon V.S.,U.S. Department of Agriculture | And 3 more authors.
Journal of Plant Registrations | Year: 2015

Sugarcane ‘UFCP 74-1010’ (Reg. No. CV-160, PI 673048) was released by the University of Florida and the USDA-ARS, Canal Point, for its potential use in cellulosic ethanol production. UFCP 74-1010, a cross between sugarcane (a complex hybrid of Saccharum spp.) cultivars CP 66-56-4 and CL 47-83. UFCP 74-1010 is a high fiber sugarcane that has been released to improve biomass production for cellulosic ethanol production in Florida. UFCP 74-1010 is moderately resistant to smut (caused by Sporisorium scitamineum) with significantly lower infestation compared with a reference check, ‘L 79- 1002’, under both natural environmental conditions and artificial inoculations. UFCP 74-1010 is also resistant to brown rust (caused by Puccinia melanocephala H. and P. Sydow), orange rust (caused by P. kuehnii), and mosaic (caused by Sugarcane mosaic virus) and is moderately resistant to leaf scald [Xanthomonas albilineans (Ashby) Dawson]. Mean dry biomass yield of UFCP 74-1010 (29.2 Mg ha−1) was approximately 5% higher than L 79-1002 (27.9 Mg ha−1), averaged across eight location-years of field trials. Plant composition of UFCP 74-1010 is similar to L 79-1002 with 41.9% cellulose, 27.8% hemicellulose, 22.4% lignin, 5.0% ash, and 1.6% structural protein. UFCP 74-1010 is released to be cultivated for cellulosic ethanol production on marginal or sandy soils of Florida for cellulosic ethanol production. © Crop Science Society of America. All rights reserved. Source


Sandhu H.S.,University of Florida | Gilbert R.A.,University of Florida | Comstock J.C.,U.S. Department of Agriculture | Gordon V.S.,U.S. Department of Agriculture | And 3 more authors.
Journal of Plant Registrations | Year: 2016

‘UFCP 82-1655’ (Reg. No. CV-164; PI 673050), a high fiber and low sucrose sugarcane, also called energy cane (a complex hybrid of Saccharum sp.), was developed through the collaborative effort of the University of Florida (UF) and the USDA-ARS, Canal Point (CP) for its potential use in cellulosic ethanol production in Florida. UFCP 82-1655 has moderate to high resistance against smut (caused by Sporisorium scitamineum). UFCP 82-1655 did not have any natural infestation of brown rust (caused by Puccinia melanocephala H. & P. Sydow), orange rust (caused by P. kuehnii), mosaic (caused by Sugarcane mosaic virus) and leaf scald [caused by Xanthomonas albilinenas (Ashby) Dawson]. Dry biomass yield (soluble plus insoluble dry weight) of UFCP 82-1655 was not significantly different from ‘L 79-1002’. Averaged across different crop cycles (plant cane, first ratoon, second ratoon, and third ratoon) at three locations in Florida (Citra, Tecan and Lykes Bros. farms), mean dry biomass yield of UFCP 82-1655 was 32.7 Mg ha−1 compared with 30.6 Mg ha−1 for the reference check, L 79-1002. Plant composition (% fiber) of UFCP 82-1655 is composed of 41.7% cellulose, 27.9% hemicellulose, 22.6% lignin, 2.6% nonstructural ash, 2% structural ash, and 1.6% structural protein, which is quite similar to L 79-1002. UFCP 82- 1655 is released to enhance genetic diversity and to improve disease resistance in energy cane. © 2015 Crop Science Society of America. All rights reserved. Source

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