The graph below shows the effects of different brands of fertilizer on bean plant growth.
Sample Response
The bar graph illustrates the influence of five fertilizer treatmentsfive kinds of fertilizers on the average height of bean plants in centimetresheight in cm of bean plants. Overall, Granny’s bloomers produced the highest number of bean plants, while Miracle Gro developed the shortest crop.
In a more detailed analysis, Granny’s Bloomers and K Mark FertilizerGranny’s bloomers and K mark fertilizers caused beans to grow to over 20 cmgrow above 20cm, although the effect of Granny’s Bloomerseffect of Granny bloomers was greater than that of K Mark Fertilizergreater than that of K mark. The former made it grow up over 25cm, whereas the latter produced an average height of about 22 cmbrought about a growth slightly above 20cm.
By comparisonOn the other hand, other plant foods, such as Job’s House Plant SpikersJob’s house spikers, no fertilizer and Miracle GroNo fertilizer and Miracle-Gro, resulted in average heights of no more than 15 cmdid not make it develop more than 15cm. Job’s house plant spikers produced bean plants exactly 15 cm tallexactly 15cm tall beans plant. However, this figure is slightly higherit is insignificantly greater than the figure for no fertilizerthe one gotten from No fertilizer. Furthermore, Miracle-Gro had the smallest effect of allminimum effect among all. A plant of slightly more than 5cm developed.
Why this response received Band 7.0
The response is clearly organised, selects all five categories, and reports the approximate bar heights with effective grouping and comparisons. The main limitation is imprecise wording about plant numbers rather than average height, alongside several awkward grammatical constructions that blur otherwise accurate observations. Focus first on maintaining the measured variable throughout, then refine noun phrases and comparison structures for greater clarity and naturalness.
IELTS Writing Criteria Scores
Task Achievement
All categories and the main ranking are covered with largely accurate approximate values, though the overview sometimes confuses plant height with the number of plants.
State consistently that the chart measures average height and give the approximate values of 27, 22, 15, 13, and 6 centimetres.
Coherence and Cohesion
The overview and two logically grouped detail paragraphs create clear progression, with comparisons easy to follow despite a few vague references.
Make pronoun references explicit and connect the two lower middle values directly instead of referring vaguely to the one.
Lexical Resource
A reasonably varied descriptive vocabulary supports comparison, but several collocations and word choices, including shortest crop and insignificantly greater, are unnatural.
Use precise combinations such as shortest plants, average height, marginally taller, and produced growth of approximately 15 centimetres.
Grammatical Range and Accuracy
The response uses varied sentence forms with generally clear meaning, although agreement, article, noun-form, and reference errors appear repeatedly.
Revise phrases such as a 15-centimetre-tall bean plant and avoid unclear constructions such as made it grow up or a plant developed.
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IELTS Academic Writing Task 1
The graph below shows the effects of different brands of fertilizer on bean plant growth.
Your response
Write the task yourself, then compare your choices with the annotated response.