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Ch. 37 - Soil and Plant Nutrition
Campbell - Campbell Biology 12th Edition
Urry12th EditionCampbell BiologyISBN: 9785794169850Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoUrry 12th EditionCh. 37 - Soil and Plant NutritionProblema 1
Capitolo 37, Problema 1

The inorganic nutrient most often lacking in crops is:
a. Carbon
b. Nitrogen
c. Phosphorus
d. Potassium.

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1
Understand the role of each nutrient in plant growth: Carbon is a fundamental component of organic molecules, but it is not typically considered an inorganic nutrient. Nitrogen is crucial for the synthesis of amino acids and proteins. Phosphorus is important for energy transfer and genetic material. Potassium is involved in enzyme activation and water regulation.
Identify the common symptoms of nutrient deficiency in plants: Nitrogen deficiency often results in stunted growth and yellowing of leaves. Phosphorus deficiency can lead to poor root development and dark green leaves. Potassium deficiency might cause leaf curling and browning.
Consider the availability of these nutrients in soil: Nitrogen is often depleted due to its high demand and mobility in soil, making it a common limiting factor for plant growth.
Review agricultural practices: Farmers frequently add nitrogen fertilizers to soil to enhance crop yield, indicating its common deficiency.
Conclude which nutrient is most often lacking based on its role, deficiency symptoms, and agricultural practices: Nitrogen is typically the inorganic nutrient most often lacking in crops.

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Inorganic Nutrients

Inorganic nutrients are essential elements that plants absorb from the soil to support growth and development. Unlike organic nutrients, they do not contain carbon-hydrogen bonds. Key inorganic nutrients include nitrogen, phosphorus, and potassium, which are vital for various physiological processes in plants.
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Soil Nutrients

Nitrogen in Plant Growth

Nitrogen is a crucial component of amino acids, proteins, and chlorophyll, making it vital for plant growth and photosynthesis. It is often the most limiting nutrient in agricultural soils, leading to reduced crop yields if not adequately supplied. Nitrogen deficiency can result in stunted growth and yellowing of leaves.
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Nitrogen Cycle

Phosphorus in Plant Development

Phosphorus is essential for energy transfer within plants, as it is a component of ATP, the energy currency of cells. It also plays a critical role in root development and flowering. Phosphorus deficiency can lead to poor root growth and delayed maturity, affecting overall plant health and productivity.
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Embryonic Plant Development
Pratica correlata
Domanda del libro di testo

Micronutrients are needed in very small amounts because

a. Most of them are mobile in the plant

b. Most serve mainly as cofactors of enzymes

c. Most are supplied in large enough quantities in seeds

d. They play only a minor role in the growth and health of the plant

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Domanda del libro di testo

Mycorrhizae enhance plant nutrition mainly by:

a. Absorbing water and minerals through the fungal hyphae

b. Providing sugar to root cells, which have no chloroplasts

c. Converting atmospheric nitrogen to ammonia

d. Enabling the roots to parasitize neighboring plants

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Domanda del libro di testo

Epiphytes are:

a. Fungi that attack plants

b. Fungi that form mutualistic associations with roots

c. Nonphotosynthetic parasitic plants.

d. Plants that grow on other plants.

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