Comparative evaluation of wheat harvesting technologies for smallholder farms in West Champaran, Bihar: Economic and field performance assessment

Introduction

Wheat (Triticum aestivum L.) is a major contributor to food security and rural income in India, where states such as Bihar hold significant importance due to their extensive cultivation and reliance on smallholder farming systems (Bhattarai et al., 2020; Van Loon et al., 2020) [3,15] . West Champaran district, in particular, is characterized by small, fragmented landholdings and a high degree of manual labor input for agricultural operations (Kisku & Singh, 2022) [9] . Traditional wheat harvesting, involving sickle-based cutting and stationary threshing, is increasingly challenged by escalating labor costs, acute workforce shortages, and the pressing need for timely harvest to minimize yield loss and optimize crop rotation (Kumar & Alamgir, 2022) [8] . Manual harvesting requires up to 150 man-hours per hectare in Bihar, resulting in substantial economic and ergonomic burdens (Sekhar & Bhatt, 2014) [13] . Drudgery and associated musculoskeletal disorders are widespread, particularly among women and older farmers who comprise much of the available labor pool. Further, delays in harvesting due to labor scarcity exacerbate grain losses from shattering, pests, and adverse weather (Kumar et al., 2019) [9] . Agricultural mechanization offers a pathway to address these challenges. Particularly, tractor-mounted reaper-cum-binders and self-propelled combine harvesters have been introduced to streamline wheat cutting, bundling, and threshing, promising sharp reductions in labor input and enhanced operational efficiency. Mechanization enables increased cropping intensity, timely residue management, and opportunities for precision agriculture (Van Loon et al., 2020) [15] . Field studies demonstrate labor cost reductions of Rs 1,500-2,500/ha and yield loss prevention of up to 20%. Despite these advances, mechanization uptake in Bihar is constrained by financial barriers, lack of custom hiring infrastructure, small field sizes, and limited farmer awareness of technology benefits (CSISA Survey, 2014; Farmonaut Report, 2025) [16] . Government and donor initiatives have attempted to address these gaps by supporting equipment banks and knowledge diffusion, yet localized field evidence is essential to inform scalable intervention (Van Loon et al., 2020) [15] . This study investigates wheat harvesting technologies in West Champaran, comparing manual methods, reaper-cumbinder, and combine harvester across ten representative 1acre farmer fields. The aim is to quantify economic, ergonomic, and field efficiency performance under realworld, smallholder conditions, thus informing regional and national mechanization strategies.

Materials and Methods

Study Location and Design

Field trials were conducted in West Champaran district, Bihar, during the 2022-23 rabi season. Ten farmers were selected via stratified random sampling based on farm size, soil type, and previous yield records to represent typical smallholder conditions and field variability in West Champaran. Each 1-acre trial plot received uniform presowing management, including land preparation, fertilizer application, irrigation schedule, and pest management practices, using the wheat variety DBW-187 to maintain consistency across treatments ((Kumar et al., 2019) [9] . All machinery operations conformed to BIS standards for field performance and safety evaluation (Devani & Pandey, 1985) [6] .

Treatments

Data Collection and Analysis

Collected data included labor input, fuel consumption, field efficiency, grain losses, yields, and economic returns. Data normality and homogeneity of variances were tested prior to analysis. Statistical comparisons between treatments were performed using one-way ANOVA followed by Tukey's HSD test at a 5% significance level (Kumar et al., 2017) [10] . Each treatment was evaluated across ten independent farmer fields, considered as replications, to capture field-to-field variability under real farm conditions

Results

The results obtained from the comparative evaluation of three wheat harvesting technologies-manual harvesting with stationary threshing (T 1 ), tractor-mounted reaper-cum-binder with threshing (T 2 ), and self-propelled combine harvester (T 3 )-are presented here. Data were compiled from trials conducted on 1-acre plots across ten farmers' fields in West Champaran district, Bihar.

Economic Analysis

Economic analysis of different wheat harvesting operation are presented in Table1. The total labor requirement showed a pronounced reduction with mechanization. Manual harvesting (T 1 ) demanded the highest labor input of 150 man-hours per hectare, reflecting the intensive nature of sickle harvesting and manual bundling. In contrast, both mechanized treatments (T 2 and T 3 ) required only 2 manhours per hectare, including the tractor driver and one helper for the combine harvester (Table 1). This represents a dramatic labor saving exceeding 98%, which can substantially alleviate labor scarcity during peak harvest periods. The operational costs similarly followed this trend. While the manual method (T 1 ) incurred the highest harvesting cost of Rs 8063/ha-including Rs 4688 for cutting and bundling, Rs 375 for bundle collection, and Rs 3000 for threshingtreatment T 3 using the combine harvester recorded the lowest overall cost at Rs 5000/ha (Table 1). The reapercum-binder (T 2 ) presented intermediate costs with a 20.93% savings relative to manual practice, highlighting it as a costeffective intermediary technology. Notably, threshing costs were eliminated in T 3 due to the combine's integrated threshing and cleaning operations.

Field Efficiency, Fuel Consumption and Harvesting Losses while operation

Mechanized technologies substantially improved field operational efficiency and capacity. The theoretical field capacity ranged from a low 0.014 ha/hr in manual harvesting (T 1 ) to 0.9 ha/hr using the combine (T 3 Effective field capacity followed this trend, with T 3 recording the highest value (0.67 ha/hr), and treatments significantly different from one another as indicated by Turkey HSD pairwise comparison (a, b, c) (Table 3). Field efficiency (percentage of theoretical capacity achieved) was also significantly different across treatments (p<0.05), with the highest efficiency recorded for the reaper-cum-binder at 80%, followed by the combine at 74%, and manual at 57.14%. Fuel consumption increased from negligible (manual) to 3.7 L/ha for the reaper-cum-binder and 35 L/ha for the combine harvester, with all treatments differing significantly (p<0.05). Harvesting losses were substantially reduced with mechanization, from 28.8 kg/ha in manual harvesting to 24.5 kg/ha in the reaper-cum-binder and 15 kg/ha in the combine, all statistically significant differences (p<0.05). Overall, the improvements in operational metrics confirm the efficacy of mechanized wheat harvesting in increasing productivity and reducing losses under smallholder conditions.

Discussion

This study conducted during the 2022-23 wheat season in West Champaran, Bihar, demonstrates that mechanized wheat harvesting technologies provide substantial advantages over traditional manual methods. Mechanization drastically reduced labor requirements-from 150 to 2 manhours per hectare-addressing critical labor shortages and reducing the physical burden associated with manual harvesting (Kumar & Alamgir, 2022) [8] .

Combine harvesters offered the greatest cost savings, reducing total harvesting costs by nearly 38%, and delivered the highest net returns and benefit-cost ratio. Tractormounted reaper-cum-binders provided a viable intermediate mechanization option, balancing costs, efficiency, and accessibility for smallholder farmers (Rao & Meena, 2019) [12] . Mechanized harvesting also enhanced field efficiency (up to 80%) and substantially lowered grain losses, thereby improving effective yields and farm profitability. Although fuel consumption was higher in mechanized treatmentsespecially combine harvesters-the overall economic benefits outweighed these costs (Tafa et al., 2022; Huda et al., 2019) [14,2] . An important consideration beyond economics and operational metrics is the quality of wheat residue produced.

Reaper-cum-binder systems produce longer, coarser straw preferred as feed in small to medium farms with livestock. Conversely, combine harvesters generate finely chopped straw more suitable for residue management but less ideal as fodder. Therefore, farmers with significant livestock are more likely to favor reaper-cum-binder technology, while large-scale farmers may prioritize the efficiency and residue benefits of combine harvesters. This highlights the need for alignment of mechanization options with farm size and resource use (Tafa et al., 2022; Huda et al., 2019) [14,2] . These findings corroborate regional mechanization research and emphasize the necessity for policy support to improve machinery access through custom hiring, training, and financing schemes (Farmonaut Report, 2025; Kisku & Singh, 2022) [16,7] . Future multi-season research will help validate these conclusions and explore integration with sustainable practices.

Conclusion

The study demonstrates that mechanized wheat harvesting technologies outperform traditional manual harvesting in labor efficiency, cost-effectiveness, field performance, and grain preservation under smallholder farm conditions in West Champaran, Bihar. The self-propelled combine harvester delivered the greatest economic returns and operational efficiency, while the tractor-mounted reaper-cum-binder offers a practical and cost-effective intermediate mechanization option suited to smaller farms. Mechanization substantially reduces labor input, thereby lowering the risk of harvest delays and the associated yield losses. Although mechanized harvesting methods incur higher fuel consumption, the improvements in net profitability and benefit-cost ratios are remarkable. Furthermore, residue characteristics differ between technologies: the coarser straw produced by reaper-cumbinders is preferable for livestock feed on small to medium farms, whereas the finely chopped residue from combine harvesters benefits large-scale farms focusing on efficient residue management. This differentiation should guide technology choice based on farm size and integrated farming objectives. These findings advocate for enhanced access to mechanized harvesting through customized service models, farmer training programs, and institutional support to overcome financial and operational barriers. Scaling up mechanization can significantly contribute to sustainable wheat production, raise farmer incomes, and improve labor welfare in Bihar's smallholder-dominated agricultural systems. Future research should focus on assessing long-term impacts, regional scalability, and integration of mechanization with conservation agriculture practices to bolster regional food security and environmental sustainability.

Acknowledgement

AcknowledgementsThe authors thank KVK Narkatiaganj under DRPCAU, Pusa, Bihar project leads for logistical and technical support during field trials.

References

1. Ahmed E, Sulaiman J, Mohd S. Wheat production and economics. Am J Agric Biol Sci. 2011;6(3):332-338.
2. Huda M, Bhuiyan M, Nath B, Milion M, Islam S, Paul H, et al. Performance evaluation and economics of the reaper binders for harvesting the paddy of Bangladesh. J Agric Eng. 2019;42:61-67.
3. Bhattarai M, Singh G, Takeshima H, Shekhawat RS. Farm machinery use and the agricultural machinery industries in India: status, evolution, implications, and lessons learned. In: An evolving paradigm of agricultural mechanization development: How much can Africa learn from Asia? 2020;3:97-138.
4. Chaab RK, Karparvarfard SH, Rahmanian-Koushkaki H, Mortezaei A, Mohammadi M. Predicting header wheat loss in a combine harvester: a new approach. J Saudi Soc Agric Sci. 2020;19(2):179-184.
5. Chen X, He X, Wang W, Qu Z, Liu Y. Study on the technologies of loss reduction in wheat mechanization harvesting: a review. Agriculture. 2022;12(11):1935.
6. Devani RS, Pandey MM. Design, development and field evaluation of vertical conveyor reaper windrower. 1985;41-52.
7. Kisku U, Singh AK. A review on custom hiring services under Indian conditions: farmer's perception, associated factors, constraints, and suggestions. Asian J Agric Ext Econ Sociol. 2022;40(11):8-27.
8. Kumar S, Alamgir DM. Constraints of farm mechanization and subsidies distribution in the agriculture sector of Bihar. MUDRA J Finance Account. 2022;9:1-14.
9. Kumar A, Kumari A, Chandra SKS. Performance evaluation and economics of the reaper-cum-binder machine for the mechanized harvesting of wheat crop at Madhubani district of Bihar. J Pharmacogn Phytochem. 2019;8(4):63-68.
10. Kumar A, Kumar A, Khan K, Kumar D. Performance evaluation of harvesting and threshing methods for wheat crop. Int J Pure Appl Biosci. 2017;5(2):604-611.
11. Rao JH, Meena BS. Performance and cost economics evaluation of different types of reaper binder for harvesting of wheat in Satna district of Madhya Pradesh, India. Int J Curr Microbiol App Sci. 2019;8(10):2115-2124.
12. Sekhar CSC, Bhatt Y. Effect of farm mechanization on agricultural growth and comparative economics of labour and machinery in India. New Delhi: Institute of Economic Growth; 2014.
13. Tafa W, Woyessa D, Tsegaye A. Performance evaluation of reaper-binder for wheat. Am J Agric Sci Eng Technol. 2022;6(2):48-54.
14. Van Loon J, Woltering L, Krupnik TJ, Baudron F, Boa M, Govaerts B. Scaling agricultural mechanization services in smallholder farming systems: case studies from sub-Saharan Africa, South Asia, and Latin America. Agric Syst. 2020;180:102792.
15. Farmonaut Report. Bihar Wheat: Trends and Management 2025. Farmonaut; 2025. Available from: https://farmonaut.com/reports/Bihar-wheat-2025.