Agronomy Degree Practice Exam

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Elevate your agronomy skills with our exam. Prepare using quizzes, flashcards, and multiple choice questions. Familiarize yourself with key concepts and excel in your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What is the ideal soil pH range for most nutrients?

5.0-6.0
7.0-9.0
6.5-7.5
4.0-5.0

The correct answer is: 6.5-7.5

The ideal soil pH range for most nutrients is typically between 6.5 and 7.5. This range is considered optimal because it allows for the best availability of essential nutrients to plants. Within this pH range, macronutrients like nitrogen, phosphorus, and potassium, as well as micronutrients such as iron, manganese, and zinc, are readily accessible for plant uptake. Soils that are too acidic (below a pH of 6.0) can lead to nutrient deficiencies, particularly for nutrients such as calcium and magnesium, while also increasing the solubility of heavy metals, which can be toxic to plants. Conversely, soils that are too alkaline (above a pH of 7.5) can make nutrients like iron and zinc less available, leading to deficiencies and impacting plant health. The chosen range promotes a balanced ecosystem in the soil, enhancing microbial activity and overall soil health, which further contributes to nutrient cycling and availability. Thus, maintaining soil pH within the 6.5 to 7.5 range is crucial for achieving optimal growth and yield in most cropping systems.