Effect of botanical composition calibration on the accuracy of undisturbed sward height and comparative yield method techniques for herbage mass estimation in tropical heterogeneous pastures

References

• Balehegn M, Berhe K. 2016. Training reduced subjectivity of comparative yield method of estimation of grassland biomass. Grass and Forage Science 71: 482–489. https://doi.org/10.1111/gfs.12194.
   Web of Science ®Google Scholar
• Boval M, Dixon RM. 2012. The importance of grasslands for animal production and other functions: a review on management and methodological progress in the tropics. Animal 5: 748–762. https://doi.org/10.1017/S1751731112000304
   Google Scholar
• Cook BG, Pengelly BC, Schultze-Kraft R, Taylor M, Burkart S, Cardoso Arango JA, González Guzmán JJ, Cox K, Jones C, Peters M. 2020. Tropical Forages: An interactive selection tool. 2nd and Revised Edn. International Center for Tropical Agriculture (CIAT), Cali, Colombia and International Livestock Research Institute (ILRI), Nairobi, Kenya.
   Google Scholar
• Cóser AC, Martins CE, Deresz F, Freitas AFD, Paciullo DSC, Salvati JA, Schimidt LT. 2003. Métodos para estimar a forragem consumível em pastagem de capim-elefante. Pesquisa Agropecuária Brasileira 38: 875–879. https://doi.org/10.1590/S0100-204X2003000700012.
   Google Scholar
• Costa BM, Ledo CAS, Silva MC, Teixeira VI. 2009. Forage production estimate in Brachiaria decumbens pasture. Archivos de Zootecnia 58: 141–144. https://doi.org/10.21071/az.v58i221.5333.
   Google Scholar
• Despain DW, Smith EL. 1997. The comparative yield method for estimating range production. In: Ruyle GB (eds.), Some Methods for Monitoring Rangelands and Other Natural Area Vegetation. Extension Report 9043. Tucson: University of Arizona Cooperative. pp 49–61. https://extension.arizona.edu/sites/extension.arizona.edu/files/pubs/az9043.pdf.
   Google Scholar
• Duru M, Bossuet L. 1992. Estimation de la masse d’herbe par le ‘sward-stick’. Premiers résultats. Fourrages 131: 283–300.
   Google Scholar
• Edvan R, Bezerra L, Marques C, Carneiro MS, Oliveira R, Ferreira R. 2016. Methods for estimating forage mass in pastures in a tropical climate. Revista de Ciências Agrárias 39: 36–45.
   Google Scholar
• Fricke T, Richter F, Wachendorf M. 2011. Assessment of forage mass from grassland swards by height measurement using an ultrasonic sensor. Computers and Electronics in Agriculture 79: 142–152. https://doi.org/10.1016/j.compag.2011.09.005.
   Web of Science ®Google Scholar
• George MR, Barry SJ, Larson SR, McDougald NK, Ward TA, Harper JM, Dudley DM, Ingram RS, Laca EA. 2006. Comparison of comparative yield and stubble height for estimating herbage standing crop in annual rangelands. Rangeland Ecology and Management 59: 438–441. https://doi.org/10.2111/04-166R2.1.
   Web of Science ®Google Scholar
• Gonzalez MA, Hussey MA, Conrad BE. 1990. Plant height, disk, and capacitance meters used to estimate bermudagrass herbage mass. Agronomy Journal 82: 861–864. https://doi.org/10.2134/agronj1990.00021962008200050002x.
   Web of Science ®Google Scholar
• Harmoney KR, Moore KJ, George JR, Brummer EC, Russell JR. 1997. Determination of pasture biomass using four indirect methods. Agronomy Journal 89: 665–672. https://doi.org/10.2134/agronj1997.00021962008900040020x.
   Web of Science ®Google Scholar
• Haydock KP, Shaw NH. 1975. The comparative yield method for estimating dry matter yield of pasture. Australian Journal of Experimental Agriculture 15: 663–670.
   Google Scholar
• Klootwijk CW, Holshof G, de Boer IJM, van den Pol-Van Dasselaar A, Engel B, van Middelaar CE. 2019. Correcting fresh grass allowance for rejected patches due to excreta in intensive grazing systems for dairy cows. Journal of Dairy Science 102: 10451–10459. https://doi.org/10.3168/jds.2018-16120.
   PubMed Web of Science ®Google Scholar
• Li F, Zeng Y, Luo J, Ma R, Wu B. 2016. Modeling grassland aboveground biomass using a pure vegetation index. Ecological Indicators 62: 279–288. https://doi.org/10.1016/j.ecolind.2015.11.005.
   Web of Science ®Google Scholar
• Liao JJZ, Lewis JW. 2000. A note on concordance correlation coefficient. PDA Journal of Pharmaceutical Science and Technology 54: 23–26.
   PubMedGoogle Scholar
• Mannetje LT, Haydock KP. 1963. The dry-weight rank method for the botanical analysis of pasture. Grass and Forage Science 18: 268–275. https://doi.org/10.1111/j.1365-2494.1963.tb00362.x.
   Google Scholar
• Martin RC, Astatkie T, Cooper JM, Fredeen AH. 2005. A comparison of methods used to determine biomass on naturalized swards. Journal of Agronomy and Crop Science 191: 152–160. https://doi.org/10.1111/j.1439-037X.2004.00145.x.
   Web of Science ®Google Scholar
• Murphy WM, Silman JP, Barreto ADM. 1995. A comparison of quadrat, capacitance meter, HFRO sward stick, and rising plate for estimating herbage mass in a smooth-stalked, meadowgrassdominant white clover sward. Grass and Forage Science 50: 452–455. https://doi.org/10.1111/j.1365-2494.1995.tb02340.x.
   Web of Science ®Google Scholar
• Murphy DJ, O’Brien B, Hennessy D, Hurley M, Murphy MD. 2021. Evaluation of the precision of the rising plate meter for measuring compressed sward height on heterogeneous grassland swards. Precision Agriculture 22: 922–946. https://doi.org/10.1007/s11119-020-09765-9.
   Web of Science ®Google Scholar
• O’Donovan M, Dillon P, Rath M, Stakelum G. 2002. A comparison of four methods of herbage mass estimation. Irish Journal of Agricultural and Food Research 41: 17–27.
   Web of Science ®Google Scholar
• O’Sullivan M, O’Keeffe WF, Flynn MJ. 1987. The value of pasture height in the measurement of dry matter yield. Irish Journal of Agricultural Research 26: 63–68.
   Google Scholar
• Rayburn EB, Rayburn SB. 1998. A standardized plate meter for estimating pasture mass in on-farm research trials. Agronomy Journal 90: 238–241. https://doi.org/10.2134/agronj1998.00021962009000020022x.
   Web of Science ®Google Scholar
• Sanderson MA, Rotz CA, Fultz SW, Rayburn EB. 2001. Estimating forage mass with a commercial capacitance meter, rising plate meter, and pasture ruler. Agronomy Journal 93: 1281–1286. https://doi.org/10.2134/agronj2001.1281.
   Web of Science ®Google Scholar
• Sanderson MA, Soder KJ, Brzezinski N, Taube F, Klement K, Muller LD, Wachendorf M. 2006. Sward structure of simple and complex mixtures of temperate forages. Agronomy Journal 98: 238–244. https://doi.org/10.2134/agronj2005.0172.
   Web of Science ®Google Scholar