By the end of this chapter, you will be able to:
These skills will help you work confidently and efficiently in the field, keeping both yourself and the equipment safe for a successful harvest.
Compiled by: Esther Wachira
Harvesting is a critical phase in crop production that directly influences the quantity and quality of the yield. For Agriculture and Extension professionals in Kenya, understanding how to operate harvesting machinery is essential to improve efficiency, reduce post-harvest losses, and ensure timely harvesting. This chapter explores the various types of harvesting machinery commonly used in Kenyan farms, their functions, and operational considerations. Mastery of these machines supports sustainable agricultural productivity and enhances farmers' income.
Harvesting machinery refers to the mechanical equipment designed to reap, gather, and process crops from the field. These machines help farmers overcome labor shortages and reduce the time required to harvest large areas, which is crucial in Kenya’s diverse agricultural zones where timely harvesting can prevent crop damage from weather or pests. The use of harvesting machinery also improves the uniformity and quality of harvested produce, which is vital for meeting market standards and export requirements.
Harvesting machinery encompasses equipment that performs the tasks of cutting, gathering, threshing, and collecting crops. Their role is to mechanize the manual harvesting process, which traditionally involves significant labor and time. In Kenya, where smallholder farmers dominate, appropriate harvesting machinery can bridge labor gaps and improve productivity, especially during peak seasons.
The importance of harvesting machinery in Kenya includes enhancing labor efficiency, minimizing crop losses during harvesting, and ensuring timely farm operations. For example, maize farmers in Uasin Gishu County who use combine harvesters experience faster harvesting and less grain damage compared to manual harvesting. Mechanization also allows farmers to handle larger acreage, improving overall food security.
Selecting the right harvesting machinery depends on crop type, farm size, terrain, and available capital. For instance, a potato harvester suited for flat, irrigated farms in Nakuru may not perform well in hilly areas of Meru. Other factors include fuel availability, maintenance services, and operator skill level, which determine the machine’s effectiveness and longevity.
Proper maintenance ensures harvesting machinery operates efficiently and safely. Regular checks on blades, belts, and engines prevent breakdowns during critical harvesting windows. Safety protocols such as wearing protective gear and following operational manuals reduce accidents, which is especially important when training extension workers who assist smallholder farmers.
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Create a free accountThis chapter provided a comprehensive overview of harvesting machinery, highlighting their essential role in modern farming operations. Various types of harvesting machinery were explored, including balers, mowers, combined harvesters, potato harvesters, and threshers, each designed for specific crop harvesting tasks. The chapter detailed the uses and operational procedures for these machines, emphasizing efficiency and safety during farm activities. Proper maintenance practices were discussed extensively, covering servicing routines, repair techniques, and appropriate storage methods to extend machinery lifespan. Practical guidance was given on operating each type of harvesting machinery effectively on the farm, ensuring optimal performance. Finally, maintenance specific to the various machines was underscored to maintain functionality and prevent breakdowns during critical harvesting periods. This integrated approach equips learners with the skills necessary to manage harvesting machinery proficiently from operation through upkeep.
Type: Individual
| Tools & Equipment | Materials |
|---|---|
| Working table | Assessment worksheet |
| Printed photographs of harvesting machinery | Dust coat/Overall |
| Reference manual for harvesting machinery | Safety boots |
| Pen | Gloves |
| Pencil | |
| Eraser |
| S/N | Item | Quantity |
|---|---|---|
| 1 | Working table | 1 Pc per Candidate |
| 2 | Printed photographs of harvesting machinery (combine harvester, maize sheller, rice harvester, wheat reaper, sickle, thresher) | 1 Set per Candidate |
| 3 | Reference manual for harvesting machinery | 1 Pc per Candidate |
| 4 | Assessment worksheet (with tables for documentation) | 2 Sheets per Candidate |
| 5 | Pen | 1 Pc per Candidate |
| 6 | Pencil | 1 Pc per Candidate |
| 7 | Eraser | 1 Pc per Candidate |
| 8 | Dust coat/Overall | 1 Pc per Candidate |
| 9 | Safety boots | 1 Pair per Candidate |
| 10 | Gloves | 1 Pair per Candidate |
| Items to be Evaluated | Marks Available | Marks Obtained | Comments |
|---|---|---|---|
| TASK 1: Observation of PPE and Preparation | |||
| Wore dust coat/overall correctly (Award 1 mark if worn correctly or zero) | 1 | ||
| Wore safety boots correctly (Award 1 mark if worn correctly or zero) | 1 | ||
| Wore gloves correctly (Award 1 mark if worn correctly or zero) | 1 | ||
| Sub-Total | 3 | ||
| TASK 2: Identification of Harvesting Machinery | |||
| Correctly identified combine harvester from photographs (Award 2 marks if correctly identified or zero) | 2 | ||
| Correctly identified maize sheller from photographs (Award 2 marks if correctly identified or zero) | 2 | ||
| Correctly identified rice harvester from photographs (Award 2 marks if correctly identified or zero) | 2 | ||
| Correctly identified wheat reaper from photographs (Award 2 marks if correctly identified or zero) | 2 | ||
| Correctly identified sickle from photographs (Award 1 mark if correctly identified or zero) | 1 | ||
| Correctly identified thresher from photographs (Award 1 mark if correctly identified or zero) | 1 | ||
| Sub-Total | 10 | ||
| TASK 3: Selection and Documentation of Appropriate Machinery | |||
| Selected appropriate machinery for maize (e.g. combine harvester or maize sheller) (Award 3 marks for correct selection or zero) | 3 | ||
| Selected appropriate machinery for rice (e.g. rice harvester or sickle) (Award 3 marks for correct selection or zero) | 3 | ||
| Selected appropriate machinery for wheat (e.g. wheat reaper or combine harvester) (Award 3 marks for correct selection or zero) | 3 | ||
| Documented the selection for each crop on the worksheet (Award 1 mark for each crop documented or zero x 3 = 3 marks) | 3 | ||
| Provided justification for each selection based on field conditions and machinery specifications (Award 2 marks for each crop justification or zero x 3 = 6 marks) | 6 | ||
| Sub-Total | 18 | ||
| PRODUCT CHECKLIST | |||
| Completed worksheet is neat, legible, and fully filled for all three crops (Award 3 marks if all sections are neat, legible, and complete or zero) | 3 | ||
| Selections match correct machinery as per reference manual (Award 4 marks if all selections are correct or zero) | 4 | ||
| Justifications are relevant and based on provided field conditions and machinery specifications (Award 2 marks if all justifications are relevant or zero) | 2 | ||
| Sub-Total | 9 | ||
| GRAND TOTAL | 40 | ||
Type: Individual
| Tools & Equipment | Materials |
|---|---|
| Tractor with PTO | Baling twine |
| Mounted rectangular baler | Maize stover |
| Measuring tape | Gloves |
| Weighing scale | Dust coat/overall |
| Grease gun | Safety boots |
| Adjustable spanner | Face mask |
| Oil can | |
| Rake |
| S/N | Item | Quantity |
|---|---|---|
| 1 | Tractor with PTO | 1 Pc per Candidate |
| 2 | Mounted rectangular baler (e.g. New Holland 570) | 1 Pc per Candidate |
| 3 | Baling twine | 20 m per Candidate |
| 4 | Maize stover (dried) | 0.25 acre per Candidate |
| 5 | Measuring tape (5m) | 1 Pc per Candidate |
| 6 | Weighing scale (up to 50 kg) | 1 Pc per Candidate |
| 7 | Grease gun | 1 Pc per Candidate |
| 8 | Adjustable spanner | 1 Pc per Candidate |
| 9 | Oil can | 1 Pc per Candidate |
| 10 | Rake | 1 Pc per Candidate |
| 11 | Gloves | 1 Pair per Candidate |
| 12 | Dust coat/overall | 1 Pc per Candidate |
| 13 | Safety boots | 1 Pair per Candidate |
| 14 | Face mask | 1 Pc per Candidate |
| Items to be Evaluated | Marks Available | Marks Obtained | Comments |
|---|---|---|---|
| TASK 1: Preparation and Safety | |||
| Wore correct PPEs: gloves, dust coat/overall, safety boots, face mask (Award 1 mark for each PPE worn as per workplace procedure or zero x 4 = 4 marks) | 4 | ||
| Inspected tractor and baler for serviceability (checked oil, fuel, greasing points, PTO guards) (Award 1 mark each for oil, fuel, and greasing inspection or zero x 3 = 3 marks) | 3 | ||
| Assembled all tools and materials at the worksite (Award 2 marks for assembling all required tools and materials or zero) | 2 | ||
| Sub-Total | 9 | ||
| TASK 2: Baler Setup and Operation | |||
| Attached baler correctly to tractor and connected PTO shaft securely (Award 3 marks for correct attachment and safety checks or zero) | 3 | ||
| Threaded and loaded baling twine into the baler as per manufacturer’s instructions (Award 2 marks for correct threading and loading or zero) | 2 | ||
| Adjusted bale chamber settings to achieve required bale size (Award 3 marks for correct adjustment or zero) | 3 | ||
| Checked and set pickup height for maize stover windrow (Award 2 marks for correct pickup height or zero) | 2 | ||
| Started tractor and operated baler at recommended PTO speed (540 rpm) (Award 2 marks for correct PTO speed and smooth operation or zero) | 2 | ||
| Sub-Total | 12 | ||
| TASK 3: Baling and Field Operation | |||
| Collected maize stover efficiently using baler pickup, minimizing losses (Award 3 marks for minimal stover loss and even pickup or zero) | 3 | ||
| Monitored bale formation and tied bales securely with twine (Award 3 marks for correct tying and monitoring or zero) | 3 | ||
| Produced 6 bales without machine blockages or safety incidents (Award 3 marks if 6 bales completed without incident or zero) | 3 | ||
| Stopped baler and tractor safely after operation (Award 2 marks for correct shutdown and parking or zero) | 2 | ||
| Cleaned and inspected baler and tractor after use (Award 2 marks for thorough cleaning and inspection or zero) | 2 | ||
| Sub-Total | 13 | ||
| PRODUCT CHECKLIST | |||
| Each bale measures 900mm ± 20mm (length), 450mm ± 10mm (width), 400mm ± 10mm (height) (Award 2 marks for each dimension measured on all bales: length, width, height x 2 = 6 marks) | 6 | ||
| Each bale weighs 18–22 kg (Award 3 marks if all bales within weight range or zero) | 3 | ||
| Bales are rectangular, compact, and securely tied with no loose stover (Award 3 marks for uniformity, compaction, and secure tying or zero) | 3 | ||
| All 6 bales are stacked neatly at designated collection point (Award 2 marks for correct stacking or zero) | 2 | ||
| Sub-Total | 14 | ||
| GRAND TOTAL | 48 | ||
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