| Every species has an optimum range, zones of stress, and limits of tolerance with respect to every abiotic factor. |
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| The difficulty of diagnosis is increased by the fact that the abiotic factor responsible for the disease may not be present in the plant sample. |
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| Terminal heat stress is a common abiotic factor responsible for reducing yields in certain areas of West Asia and North Africa. |
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| The first important abiotic factor affecting potato productivity is drought and it has a large influence on productivity. |
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| Water is obviously a crucial and highly variable abiotic factor for every living organism. |
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| Too much or too little of any abiotic factor can limit or prevent growth of a population, even if all other factors are at or near the optimal range of tolerance. |
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| The relevant environmental noise to be taken into account is not a single abiotic factor, but rather the combined effect of all abiotic and biotic factors that affect birth and death rates. |
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| Drought stress is the most important abiotic factor limiting upland rice yields. |
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| Develop a flow chart showing what would happen to the ecosystem as a result of a change in an abiotic factor. |
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| Choose a biotic factor and an abiotic factor and describe their interaction. |
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| Salinity is an important abiotic factor that limits crop productivity for which solutions are being investigated through extensive research in plant biotechnology. |
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