Method for Determining Grain Losses Behind the Combine Header and Thresher During Soybean Harvesting

It was noted that in waterlogged soil conditions, the existing methods for assessing field grain losses when harvesting soybeans using low-cut headers are not always suitable. (Research purpose) To improve the methodology for assessing soybean losses during harvesting in the waterlogged soil conditions, using the possibility of sampling them separately behind the header and thresher of the combine. (Materials and methods) The methodological approach was based on: the impact of crop heterogeneity; the principle of adequate accuracy in loss assessment, regardless of soil conditions during harvesting; accessibility, simplicity and minimal labor intensity of the method; the possibility of differentiating grain losses behind the header to identify their main sources. Three main loss zones were identified and the characteristics of their sources were considered. The authors presented a scheme for applying square metal frames with a 1-meter side length on crops and on a harvested field area after the passage of the combine. The authors described the sequence of laboratory and field assessment and formulae for determining natural grain losses, losses behind the header and their types, soybean losses behind the thresher and total losses behind the combine. (Results and discussion) A methodology for soybean loss assessment was developed and tested during the trial of the Case IH AF6140 combine with a New Holland 740CF-30DD(SF) header. It was found out that this combine meets all the norms for soybean grain losses at a combine speed of 6 kilometers per hour. Loose grains were revealed to be the largest share of losses behind the header. To further mitigate losses, it was proposed to control the number of reel revolutions. (Conclusions) We have developed a technical approach and an algorithm for grain loss assessment with the use of rigid metal frames, which ensures high reliability, efficiency and lower labor intensity when considering losses and calculating actual and permissible (from biological yield) values for the specific and relative soybean losses behind a header and combine harvester as a whole.

1. Bumbar I.V. Uborka soi. Monografiya [Soybean harvesting. Mo­nograph]. Blagoveshсhensk: Dal`GAU. 2006. 257 (In Russian).

2. Zhalnin E.V. Kakoy kombayn vybrat`? [Which harvester to choose?] Sel`skiy mekhanizator. 2015. N4. 4-6 (In Russian).

3. Zhalnin E.V. Klassifikatsiya poter` zerna i ikh otsenka [Grain loss classification and evaluation]. Sel`skiy mekhanizator. 2014. N9. 4-6 (In Russian).

4. Panasyuk A.N., Lipkan` A.V., Bumbar I.V., Lazarev V.I. Ispytaniya zhatki soevoy unifitsirovannoy ZhSU-700 v usloviyakh Amurskoy oblasti [Tests of ZhSU-700 unified soybean header under conditions of Amur Region]. Tekhnika i oborudovanie dlya sela. 2016. N10. 26-28 (In Russian).

5. Chaplygin M.E., Zhalnin E.V. Opredelenie kachestva raboty zernouborochnykh kombaynov [Determining the performance quality of combine harvesters operating]. Sel`sko­khozyaystvennye mashiny i tekhnologii. 2019. Vol. 13. N4. 71-76 (In Russian).

6. Fedorenko V.F., Tarkivskiy V.E., Trubitsyn N.V., Voronin E.S. Povyshenie effektivnosti otsenki funktsionalnykh kharakteristik zernouborochnykh kombaynov [Increasing the estimation efficiency of the functional characteristics of grain harvesters]. Agroinzheneriya. 2021. N1(101). 15-19 (In Russian).

7. Tronev S.V. Raschet konstruktivnykh parametrov izmeritelnykh sredstv opredeleniya poter` zerna za zernouborochnym kombaynom [Calculation of constructive parameters of measuring facilities for determination of grain losses of grain harvester]. Mezhdunarodnyy nauchno-issledovatel`skiy zhurnal. 2017. N3-4(57). 96-102 (In Russian).

8. Erokhin G.N., Konovskiy V.V. Izmenenie poter` zerna za zernouborochnymi kombaynami v protsesse ekspluatatsii [Chan­ge of loss of grain for grain collective combines in the operation process]. Nauka v tsentralnoy Rossii. 2017. N3(27). 1016 (In Russian).

9. Marchenko A.P. Analiz putey snizheniya poter` zerna v zhatvennoy chasti zernouborochnogo kombayna [Analysis of ways of reducing grain loss in reaping part of combine harvester]. Nauchnoe obozrenie. 2015. N9. 14-16 (In Russian).

10. Berenshteyn I.B., Poluektova N.R. Modelirovanie poter` zerna pri kombaynovoy uborke pshenitsy [Modelling of loss in grain harvesting by combine]. Izvestiya sel`skokhozyaystvennoy nauki Tavridy. 2019. N17(180). 86-96 (In Russian).

11. Lontseva I.A., Soboleva N.V. Model` dlya prognozirovaniya poter` soi za zhatkoy [Model for predicting the loss of soybeans behind the header]. Dal`nevostochnyy agrarnyy vestnik. 2021. N3(59). 93-98 (In Russian).

12. Petukhov D.A., Chaplygin M.E. Rezultaty issledovaniy rotornogo zernouborochnogo kombayna «John Deere S660» v usloviyakh Tambovskoy oblasti [Research results of the John Deere S660 rotary combine harvester in Tambov Region]. Tekh­ni­ka i oborudovanie dlya sela. 2013. N11. 15-18 (In Russian).

13. Menezes P.C., Rouverson P., Silva R.P., et al. Can combine headers and travel speeds affect the quality of soybean harvesting operations? Revista brasileira de engenharia Agricola e ambiental. 2018. Vol. 22(10). 732-738 (In English).

14. Cortez J.W., Syrio M.G., Rodrigues S.A. Types of header, operating speed, and geometry of collection frames on the total losses of soybean harvest. Engenharia Agricola. 2019. Vol. 39(4). 482-489 (In English).

15. Silva R.P., et al. Qualitative losses in the soybean seeds mecha­nized harvesting [Perdas qualitativas na colheita mecanizada de sementes de soja]. Semina: Ciencias Agrarias. 2013. Vol. 34(2). 477-484 (In English).

16. Lima F.B.F., Silva V.A.F., Silva R.P. Quality of mechanical soybean harvesting at two travel speeds. Engenharia Agricola. 2017. Vol. 37(6). 1171-1182 (In English).

17. Cassia M.T., et al. Monitoring of mechanized harvest operation of soybean seeds. Engenharia Agricola. 2015. Vol. 19(12). 1209-1214 (In English).

18. Kandelya M.V., Zemlyak V.L., Nazarova V.P. Obosnovanie neobkhodimosti ispol`zovaniya gusenichnogo dvizhitelya v skheme zernokormouborochnykh kombaynov v usloviyakh Dal`nego Vostoka [Justification of the need to use a caterpillar mover in the scheme of grain harvesters in the Far East]. Vestnik Priamurskogo gosudarstvennogo universiteta im. Sholom-Aleykhema. 2019. N4(37). 35-40 (In Russian).

19. Chaplygin M.E. Opredelenie kachestva raboty zernouborochnykh kombaynov pri ispytaniyakh s primeneniem rezi­novykh probootbornikov [Determination of work quality of grain harvesters when testing with rubber samplers]. Tekhnika i oborudovanie dlya sela. 2016. N11. 16-19 (In Russian).

20. Ryadnov A.I., Chaplygin M.E., Tronev S.V., Davydova S.A. Sovremennye spetsializirovannye zhatki i adaptery dlya uborki soi [Modern specialized blades and adapters for soybean harvesting]. Izvestiya Nizhnevartovskogo agrouniversitetskogo kompleksa: nauka i vysshee professionalnoe obrazovanie. 2020. N4(60). 389-402 (In Russian).