It's about accurate seed placement - Kuhn North America

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top D Although the DA-S models are extended DA models, they received substantially lower marks. Only 43% of the owners surveyed have no reservations about buying a DA-S drill again, which may be down to the fact that these wider machines are typically operated by large-scale farmers who are more demanding. Criticism centred on hopper access and filling height. The internal distribution head makes it difficult to remove all tank-leftovers. Calibration testing is also criticised for being time-consuming. Visibility is an issue, too. The depth and pressure setting system received lower marks than D Amazone Amazone D8 continues to be a popular machine even after it was replaced by the D9 model a few years ago. 83% of the owners said they would buy it again, chiefly because of its good build quality. Thanks to its light weight and small hopper, its lift requirement is relatively low. Yet, the hopper earned criticism for small capacity. Further points of criticism re- lated to missing steps on many machines, difficult emptying of tank-leftovers and difficult cleaning. All mechanical drills generally suffer from high residual seed levels, which are required to ensure no peg wheel is left unsupplied. Most machines have Suffolk coulters what was average. The hydraulic system does not provide for reading the coulter pressure. Blockages are not an issue, because most machines are equipped with CX disc coulters. Most criticism was raised on the tine harrow for its lack of strength and poor quality of work. The tines respond too readily in heavy soil and are hence not very effective. Set the tine pressure too high and the pins break off. The manufacturer re- sponded to the problem by intro- ducing 10mm tines in 2003. Other sought-after spare parts are the seed delivery tubes and passages. Overall, build quality and paint finish were rated below average. D 8 range (linkage-mounted mechanical drill) Year of manufacture: 1985 – 1999 Work width: 3.0 m – 6.0 m Hopper capacity: 600 l (3 m Unit), 840 l (4 m Unit) Coulters: Suffolk coulters and disc coulters DA-S range running behind a toothed roller. This format was reckoned to provide more accurate seed placement than disc coulters in combination with a leading wedged ring roller. As to repairs, this machine is more susceptible to defects than the average machine in the survey. This said, these drills were on average 9.6 years old, which Year of manufacture: from 1992 Work width: 3.0/4.0/4.5 m and 5.0 m Hopper capacity: 750 l (extended to 1,000 l) Coulters: Suffolk coulters and CX disc coulters The medium-sized DA-S models earned lower marks than the DA models although both ranges share identical components. User assessments - Accord DA range DA-S range Average result Visibility 2.0 2.7 2.1 Lift requirement 2.3 2.6 2.5 Hopper 2.2 2.5 2.2 Seed rate setting system 1.9 2.2 2.1 Seed placement 2.0 2.1 1.9 Tine bar 2.0 2.4 2.0 Quality of build 1.8 2.0 1.7 No. of repairs/500 ha 2.3 3.9 3.0 Buy again? Yes 79 % 43 % 75 % The Schulnoten: grading 1 system = sehr follows gut bis a 5 scale = sehr from schlecht 1 to 5, with 1 representing excellent and 5 being extremely poor. Good quality of build is still a strong selling point for D8 owners. is relatively old. Defects centred on the tines, bout markers, seed delivery tubes and the suspension systems.
D9 owners are more satisfied with the D machine’s quality of work than D8 owners are. 50% of them say their drills D D 9 range (linkage-mounted mechanical drill) Year of manufacture: from 1999 Work width: 2.5/3.0/4.0 m and 6.0 m Hopper capacity: 450 l – 600 l on 3 m version (extended to 830 l and 1,000 l); 830 l on 4 m version (extended to 1,380 l) Coulters: Suffolk coulters and RoTeC coulters The AD cultivator-mounted drills generally feature good quality of build. Sharing many components with the D9 models (metering system, coulters, tines, seed hopper etc), the cultivatormounted AD range received similar marks as this. However, lift requirement AD-P range (cultivator-mounted pneumatic drill) Year of manufacture: from 1995 AD-P Super from 2005 Work width: 3.0/4.0 m; AD-P Profi up to 4.5 m Hopper capacity: 1,550 l (extended to 2,000 l) Coulters: Suffolk/RoTeC D 87% of all AD-P owners surveyed would buy the same machine again. This is the highest score in the survey. The machine earned good marks in all categories. The 2,000-litre hopper capacities received particular praise, which is typical for a pneumatic machine. At the same time, the machine offers easy emptying of remaining seeds as well as easy cleaning. The seed level gauge is less susceptible to failure than on mechanical versions. Yet, the generous capacity and the are fitted with disc coulters, because in unploughed land these give smoother running than Suffolk coulters. Hopper capacity is bigger than on the predecessor models, yet it is not as big as on pneumatic drills. Most machines rely on Exact tines, which give good quality of work. By comparison, the seed metering system is an issue. Swapping between normal and small seeds is particularly difficult and many machines do not drill accurately to calibrated rates. These are reasons for some D9 owners to not buy the machine again. Build quality earned praise on the whole. Still, the breakdown rate was AD range (linkage-mounted mechanical drill) Year of manufacture: from 1999 Work width: 2.5/3.0/4.0 m and 4.5 m Hopper capacity: 450/600 l on 3 m drill (extended to 810/1,000 l); 830 l on 4 m drill (extended to 1,380 l) Coulters: Suffolk coulters/RoTeC coulters is considered high for this semi-mounted design so that some users would appreciate it if the hopper moved closer to the tractor. Further issues include restricted visibility on extended hoppers and the high dead weight also generated criticism, because the 3m versions weigh about 2.7t. Most criticism concerned the AD-P Profi models. The more recent Super model mounts the hopper on the press and moves the centre of gravity closer to the tractor. When extended, the hopper is yet too high to provide for convenient bag fills. Repair wise, the machine is neither extremely susceptible to damage nor particularly reliable - just middle of the road. Some farmers criticise the flimsy tine bar mountings. User criticism centres on seed rates. Many users say that calibrated and drilled rates are not always identical. higher than average. After the tines proved to be very susceptible to damage, the manufacturer modified them. The seed delivery tubes, metering aggregates, gearboxes and hoppers also needed an occasional repair. metering system. Swapping from normal to small seeds is difficult and actual sowing rates are higher than calibrated rates so that some owners replaced the bottom flaps. There is no rest on the hopper that would make bag filling easier. The amount of remaining seeds left in the hopper is large, which is attributed to the agitator that makes emptying difficult. The operator often has to sweep or blow out the remaining seeds. The lid does not close tight and invites dust contamination. Drills with leading wedged ring roller to take care of depth control do not always sow deep enough in clayey and wet soils. Many machines have RoTeC coulters, which provide excellent results, except for the flimsy depth limiters. In all other respects, the owners confirmed reliability and good build quality. Hopper capacities of up to 2,500 litres result in a high lift requirement. User assessments - Amazone D 8 D 9 AD AD-P Average result Visibility 2.1 2.1 2.1 2.4 2.1 Lift requirement 2.2 2.4 2.8 3.3 2.5 Hopper 2.7 2.2 2.3 1.9 2.2 Seed rate setting system 2.3 2.3 2.4 1.8 2.1 Seed placement 2.1 1.9 1.8 1.8 1.9 Tine bar 1.9 1.8 1.8 1.9 2.0 Quality of build 1.5 1.6 1.5 1.7 1.7 No. of repairs/500 ha 4.0 5.2 3.1 3.5 3.0 Buy again? Yes 83 % 70 % 76 % 87 % 75 % The Schulnoten: grading 1 system = sehr follows gut bis a 5 scale = sehr from schlecht 1 to 5, with 1 representing excellent and 5 being extremely poor.
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