Yahoo Canada Web Search

Search results

1. • Rounded mineral concretion

     • nodule, rounded mineral concretion that is distinct from, and may be separated from, the formation in which it occurs. Nodules commonly are elongate with a knobby irregular surface; they usually are oriented parallel to the bedding.
     www.britannica.com/science/nodule-geology

     Nodule | Igneous, Sedimentary & Metamorphic | Britannica

2. geo.libretexts.org › Bookshelves › Soil_Science1.5: Soil Chemistry - Geosciences LibreTexts

   geo.libretexts.org › Bookshelves › Soil_Science

   • Cached

   Nov 25, 2021 · Soil chemistry involves the study of the chemical composition, chemical properties and chemical reactions involving soil solids (organic matter and inorganic minerals), liquids (soil water), gases (soil air), including interactions with plants and soil organisms.

   • Soil Biodiversity and Ecology

     For example, the smallest soil bacterium is ~0.5 micrometers...

3. www.sciencedirect.com › topics › agricultural-andNodulation - an overview | ScienceDirect Topics

   www.sciencedirect.com › topics › agricultural-and

   Nodulation is a symbiotic process leading to the formation of nodules when Leguminosae roots are infected by rhizobia bacteria from soil. The bacteria in nodules convert atmospheric nitrogen to ammonium or nitrogen dioxide, which can be utilized for plant growth and development (Mylona et al., 1995).

4. Videos

   • 

     4:30

     youtube.com

     Understanding Our Soil: The Nitrogen Cycle, Fixers, and Fertilizer

     Jan 28, 2021

     2.1M Views

   • 

     33:34

     youtube.com

     ROOT NODULE FORMATION AND BIOCHEMISTRY OF NOD GENES ||CSIR NET||PLANT BIOLOGY

     Oct 23, 2018

     73.4K Views

   • 

     15:11

     youtube.com

     Mechanism of Root nodule formation | Symbiotic nitrogen fixation | A-Z concepts guide

     Feb 22, 2022

     30.7K Views

   View all

5. en.wikipedia.org › wiki › Soil_chemistrySoil chemistry - Wikipedia

   en.wikipedia.org › wiki › Soil_chemistry

   • Cached

   Soil chemistry is the study of the chemical characteristics of soil. Soil chemistry is affected by mineral composition, organic matter and environmental factors.

6. www.cambridge.org › core › booksBasic Concepts: Soil Chemistry (Chapter 5) - Soils

   www.cambridge.org › core › books

   • Cached

   Jan 12, 2024 · Summary. Soils are multiphase systems in which solids, liquids, gases, and colloids collectively interact. The solids in soils are crystalline or poorly crystalline minerals as well as organic matter. The liquid is water.

7. sciencenotes.org › nitrogen-fixation-definitionNitrogen Fixation Definition and Processes

   sciencenotes.org › nitrogen-fixation-definition

   • Cached

   Aug 15, 2023 · Nitrogen fixation converts or ‘fixes’ nitrogen into a form organisms can use. It is the conversion of atmospheric nitrogen (N 2) into ammonia (NH 3) or related nitrogenous compounds, which are assimilated by plants and subsequently enter the food chain.

8. geo.libretexts.org › Bookshelves › Soil_Science7.1: Introduction - Geosciences LibreTexts

   geo.libretexts.org › Bookshelves › Soil_Science

   • Cached

   Jun 26, 2021 · Soil Chemistry is the branch of soil science that deals with the chemical composition, chemical properties, and chemical reactions in soil. The soil environment is dynamic and comprised of a heterogeneous mixture of air, water, and inorganic and organic solids.

9. People also ask

   What is soil chemistry?

   • Soil chemistry is a branch of soil science that deals with the chemical composition, chemical reactions and chemical properties in soils. Abiotic phases of the soil include solids (organic matter and inorganic minerals), liquids (soil water), and gases (soil air), while the biotic phase consists of living organisms.

   1.5: Soil Chemistry - Geosciences LibreTexts

   geo.libretexts.org/Bookshelves/Soil_Science/Digging_into_Canadian_Soils:_An_Introduction_to_Soil_Science/01:_Digging_In/1.05:_Soil_Chemistry

   See all results for this question

   Why are nodulins called nodules?

   • The transcription of enzymes for N assimilation, carbon utilization, nodule development, etc., is often induced to high levels during nodulation. Originally, some of these genes were thought to be nodule specific and, therefore, their products were given the special name, nodulins.

   Nodulation - an overview | ScienceDirect Topics

   www.sciencedirect.com/topics/agricultural-and-biological-sciences/nodulation

   See all results for this question

   Do all nodulated plants have a predisposition to form nodules?

   • Recent molecular evidence has placed all nodulated plants in a distinct group, known as the Rosid I clade. However, the clade also contains many genera that lack the ability to nodulate. If, as is generally assumed, all members of the clade have some predisposition to form nodules, why is it only expressed in certain genera?

   Nodulation - an overview | ScienceDirect Topics

   www.sciencedirect.com/topics/agricultural-and-biological-sciences/nodulation

   See all results for this question

   What are determinate nodules?

   • In contrast, the second type, called determinate nodules, which form on plants such as soybean and common bean, is initiated from cortical cell divisions but largely grows through cell expansion and results in a globular nodule structure.

   Nodulation - an overview | ScienceDirect Topics

   www.sciencedirect.com/topics/agricultural-and-biological-sciences/nodulation

   See all results for this question

   What is a morphological nodule?

   • The nodule is a highly specialized organ . Two morphological types of nodules are known and they are determined by the plant host (Figure 10-1). The first type is called indeterminate and these nodules occur on clover and alfalfa, for example.

   Nodulation - an overview | ScienceDirect Topics

   www.sciencedirect.com/topics/agricultural-and-biological-sciences/nodulation

   See all results for this question

   What is nodulation in microbiology?

   • Nodulation is a host-specific interaction in which each rhizobial strain infects a defined plant host. From: Encyclopedia of Microbiology (Third Edition), 2009 You might find these chapters and articles relevant to this topic.

   Nodulation - an overview | ScienceDirect Topics

   www.sciencedirect.com/topics/agricultural-and-biological-sciences/nodulation

   See all results for this question

10. onlinelibrary.wiley.com › doi › fullFundamentals of Soil Chemistry - Sparks - Major Reference ...

    onlinelibrary.wiley.com › doi › full

    Oct 29, 2019 · Soil chemistry is the branch of soil science that deals with the chemical composition, chemical properties, and chemical reactions of soils. Soils are heterogeneous mixtures of air, water, inorganic and organic solids, and microorganisms (both plant and animal in nature).