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Lesson 1, Topic 1
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2.1 Understanding Soil Composition

Cartier April 11, 2023

Soil is a complex and dynamic medium that supports plant growth by providing essential nutrients, water, and oxygen. To successfully grow cannabis in soil, growers must understand the composition of the medium and the factors that contribute to its quality.

Soil composition can be broadly divided into three components:

  1. Mineral particles: These are the inorganic components of the soil, formed through the weathering of rocks and minerals. Mineral particles are classified by size into three categories: sand, silt, and clay. The relative proportions of these particles determine the soil’s texture, which impacts its water-holding capacity, nutrient availability, and aeration.
  2. Organic matter: This component of soil consists of decomposed plant and animal materials, as well as living microorganisms. Organic matter plays a vital role in soil fertility, as it provides a source of nutrients for plants and helps to improve the soil’s physical properties, such as water retention and aeration. It also supports a diverse and active soil microbiome, which aids in nutrient cycling and disease suppression.
  3. Soil pore space: The spaces between soil particles are filled with varying amounts of air and water, directly influencing plant root growth and function. Soil pore space is critical for providing oxygen to the roots, allowing for efficient nutrient uptake, and facilitating water movement throughout the soil.

In addition to these components, soil properties such as pH, electrical conductivity (EC), and cation exchange capacity (CEC) play a significant role in nutrient availability and overall plant health. Understanding and managing these factors is essential for optimizing cannabis growth and maximizing yields.

By comprehending soil composition and its impact on cannabis cultivation, growers can make informed decisions regarding soil selection, amendments, and ongoing soil management practices. This knowledge is vital for establishing a strong foundation for healthy and productive cannabis plants.

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