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A mature soil profile

Cereal grains are highly attractive to deer, and they perform well under a wide range of conditions. With regard to deer preference, oats consistently rank higher than the other cereal grains and most other forages for that matter. Oats Avena sativa are a cool-season annual cereal grain and look very similar to the other cereal grains during the early stages prior to flowering. However, experienced food plotters may notice that oats are a deeper green compared to the other grains. Also, when oats mature and produce a seed head, it is very easy to differentiate them from the others because its seed head is considered a panicle while the others have a spike.
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Soil Horizons

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Soil | Article about soil by The Free Dictionary

Plants obtain inorganic elements from the soil, which serves as a natural medium for land plants. Soil is the outer, loose layer that covers the surface of Earth. Soil quality, a major determinant, along with climate, of plant distribution and growth, depends not only on the chemical composition of the soil, but also the topography regional surface features and the presence of living organisms. Components of soil : The four major components of soil are shown: inorganic minerals, organic matter, water, and air. The amount of each of the four major components of soil depends on the quantity of vegetation, soil compaction, and water present in the soil. A good, healthy soil has sufficient air, water, minerals, and organic material to promote and sustain plant life.
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How soils form

The whole soil, from the surface to its lowest depths, develops naturally as a result of these five factors. The five factors are: 1 parent material, 2 relief or topography, 3 organisms including humans , 4 climate, and 5 time. If a single parent material is exposed to different climates then a different soil individual will form. If any one of the five factors is changed but the remaining four factors remain the same, a new soil will form. Soils that formed in dominantly organic material are classified as Histosols according to Soil Taxonomy.
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Soil microorganisms exist in large numbers in the soil as long as there is a carbon source for energy. A large number of bacteria in the soil exists, but because of their small size, they have a smaller biomass. Actinomycetes are a factor of 10 times smaller in number but are larger in size so they are similar in biomass to bacteria.
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