Plant Nutrients and Soil Fertility

False (B)

Improves plant cell growth

<p>slowly</p> Signup and view all the answers

<p>Nitrogen (D)</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>activate enzymes or support plant metabolism or support protein synthesis</p> Signup and view all the answers

<p>Carbon = Component of carbohydrates, proteins, and fats Hydrogen = Provides energy for growth and development Nitrogen = Part of plant DNA and enzymes Phosphorus = Stimulates early root and plant growth</p> Signup and view all the answers

<p>2.5-4.5% (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>N</p> Signup and view all the answers

<p>deficient</p> Signup and view all the answers

<p>Nitrogen (N) = Mobile Potassium (K) = Intermediate Phosphorus (P) = Immobile</p> Signup and view all the answers

<p>Calcium (Ca) (C)</p> Signup and view all the answers

<p>NO3− (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Boron (D)</p> Signup and view all the answers

<p>Mass flow, diffusion, and root interception</p> Signup and view all the answers

<p>older</p> Signup and view all the answers

<p>NO3− = Mobile K+ = Less mobile/Intermediate Zn2+ = Immobile</p> Signup and view all the answers

<p>Nitrogen (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Ammonium, Potassium, Calcium, or Magnesium</p> Signup and view all the answers

<p>Adsorption of nutrients as they move through soil (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Active uptake</p> Signup and view all the answers

<p>tortuosity</p> Signup and view all the answers

<p>Promotive = Enhances ion uptake Antagonistic = Decreases ion uptake</p> Signup and view all the answers

<p>Ca (A)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Soil pH</p> Signup and view all the answers

<p>6.5 to 7.5 (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>pH = - log [H+]</p> Signup and view all the answers

<p>7, 8.5</p> Signup and view all the answers

<p>Decreases (D)</p> Signup and view all the answers

<p>CEC = Cation exchange capacity AEC = Anion exchange capacity Acidic Soils = pH &lt; 7 Saline Soils = pH 7 - 8.5</p> Signup and view all the answers

<p>H2PO4–, NO3–</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Leaching of micronutrients (B)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Heavy use of high analysis fertilizers</p> Signup and view all the answers

<p>clay</p> Signup and view all the answers

<p>Poor drainage = Leaching of nutrients High nitrogenous fertilizers = Micronutrient depletion Soil texture = Nutrient retention capacity Low organic matter = Lower micronutrient availability</p> Signup and view all the answers

<p>Decline in organic matter and micronutrient availability (D)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>Khaira disease</p> Signup and view all the answers

These can be natural, synthetic, recycled, or biological products.

Include plant debris, green manure, compost, waste, and manure.

Chemical fertilizers that are artificially made to provide nutrients.

Nutrients from substances like cereal straw release slowly due to high C:N ratio.

Nutrients from N-rich sources like leguminous green manures decompose quickly.

Promotes green growth, essential for proteins, involved in photosynthesis.

Helps in energy transfer, stimulates root growth, and promotes maturity.

Contribute to plant growth, metabolism, enzyme activation, protein synthesis.

Nutrients necessary for plant growth, needed in specific amounts.

Below the necessary percentage for plant growth.

The optimal percentage of nutrients for plant health.

Nutrient levels that can harm plant growth.

Standards determining if a nutrient is essential for plants.

The ability of nutrients to move in soil and plants.

Nutrients that move easily through soil to plants.

Nutrients that do not move easily in soil.

Nutrients that are moderately available, adsorbed on clay complexes, like NH4+ and K+.

The capability of nutrients to move from older leaves to younger tissues; varies by nutrient type.

Visible signs in plants indicating a lack of nutrients, based on nutrient mobility.

Methods by which plants move nutrients from soil to roots, including mass flow, diffusion, and root interception.

Movement of nutrients along with water in the soil to plant roots.

The process of nutrient movement from areas of high concentration to low concentration in water.

The rate at which substances move through water in soil.

The amount of water present in the soil, affecting nutrient diffusion.

The complexity of pathways nutrients travel through soil, influenced by texture.

Soil's ability to maintain stable pH and nutrient availability despite changes.

Energy-driven process where nutrients are transported across plant cell membranes.

When some ions enhance the uptake of others, like calcium helping potassium uptake.

When the presence of certain ions limits the uptake of others, like sodium reducing potassium absorption.

The measure of acidity or basicity in soil, affecting nutrient availability.

The rate, placement, and timing of manures and fertilizers influence nutrient access.

Dividing fertilizer application into smaller increments for enhanced nutrient uptake.

Acidic sandy soils leach micronutrients, causing deficiencies.

Clay soils retain nutrients better than sandy soils, reducing leaching.

High cropping rates and heavy fertilization deplete soil micronutrients.

Soils with less than 2.0% organic matter may show lower micronutrient availability.

Zinc deficiency in rice, linked to deforestation and nutrient depletion.

Soil origin affects micronutrient levels; alluvium type matters.

A measure of the hydrogen ion concentration in soil solution.

pH levels between 6.5 and 7.5 where most nutrients are available.

Soils with pH < 7, harmful to plants due to nutrient toxicity.

Measure of the amount of cations soil can retain for plant use.

Soils that cannot hold many nutrients, replenishing them frequently.

The ability of soil to adsorb anions to positive charges in soil components.

Soils rich in 1:1 clay minerals and able to absorb many anions.

Soils with pH between 7 to 8.5 containing soluble salts.