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General characteristics of soil
What is the importance of soil in agriculture
What is the importance of soil in agriculture
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Recommended: General characteristics of soil
“What you see depends on how you view the world. To most people soil is just dirt but to a farmer its potential.”-DOE ZANTAMATA.
Soil is a complex ecosystem; it is made up of organic materials, liquids, minerals and gases which forms a habitat for all animals and plants. We normally tend to take soil for granted but it’s much more than mud or dust. There is no life without soil because all the plants grow in soil and we either eat these plants that grow in soil or the animals that eat the plants and soil also acts as a filter for any water that passes through it.
All soils are initially formed from rocks known as parent material. The main cause of the formation of the soil is by weathering of these parent materials and weathering is the breaking down of this parent material because of different climatic conditions.
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It is seen that the major factors limiting the production in small farms is low soil fertility, shortage of water, and soil degradation. Also proper soil enrichment by farmers is not done as they do not replenish as much nutrients back to the soil as the crops take from the …show more content…
Management of soil is concerned with the ways of making the soil of better structure and quality. There are various methods employed by the farmers to do that-
1. Mulching- It is basically treating the soil with plants that were grown on it. The cut plants are put back on the soil to prevent the soil from blowing away by wind. The edible plants are used and the non- edible parts of the plant are spread on the ground. Mulch helps in reducing the velocity of runoff which helps in reducing the soil
Compaction is a densification of the soil which reduces its biological activity, permeability, porosity, and water holding capacity, while at the same time increasing the risk of erosion due to accelerated run-off (13). While some soils are naturally compacted, mechanical pressure (i.e. heavy machinery) can compact soil (13). Erosion is a natural process which is actually essential in the soil formation process, but human activities have accelerated it (7). During erosion soil particles of the fertile topsoil are removed either by wind or water (i.e. runoff), this process is irreversible and can lead to the reduction of soil productivity (7).
In terms of agriculture, the potting soil is of equal and oftentimes greater quality and fertility
In cases of a lack of vegetation soil is exposed to erosion. Wind erosion blows the top soil off especially in the sandier areas where there are finer particles. Animals or cultivation of the soil can also break down soil particles into sizes that are more susceptible to wind erosion. This can cause a build up of soils in other places. Water washing over the loose, exposed soil can also result in large volumes of soil being lost. Most Australian soils are very shallow and have most of the nutrients in the top few centimeters. Erosion that carries away these top few centimeters of soil is particularly damaging. The remaining soil is unproductive, often unable to be re–taken over by native vegetation and susceptible to further
The protection of the worlds topsoil is vital to us. The soil is still the major medium for plant and crop growth and our basic resource for land use and development. Imagine our world without soil! A barren land with almost no plant growth and constant dustbowls to block out our sunlight. Erosion would destroy our mountain ranges. Our lakes, rivers and oceans would be clogged with sediments. Like any of our worlds problems, we must educate people about the problems and risks and how the depletion of topsoil affects our everyday needs. (Kirby, 1997)
Nutrient pollution happens when the amount of nutrients, which is mainly nitrogen and phosphorus, is too much and is overloading a water ecosystem. This pollution comes from many different things: water runoff, agricultural runoff, stream instability, and paved/unpaved roads to name a few (Garton, 2014). Lake Champlain’s problem deals with too much phosphorus in the system, and not so much with nitrogen.
Gardiner, D. T. and Raymond, W. M. 2004. Soils in our environment, Pearson Prentice Hall, New Jersey.
Schaetzl, E. & Anderson, S. 2005. Soils: Genesis and Geomorphology. 1st Edition. New York: Cambridge University Press.
The physical property of clay are of extreme importance in soil science. Plant growth, and hence crop production, within any environmental condition is largely controlled by soil structure which results from reactions involving clay. The active clay material in .soil, particularly in combination with small amounts of organic matter, exerts a tremendous effect on soil properties. This effect may be on structure (the arrangement of soil particles), or on consistence (the response of the soil to mechanical manipulation). Where structure is favorable soil grains are clumped together into effectively larger aggregates so that soils have a more open arrangement and water and air can move freely and roots function normally. Where structure is unfavorable, soils tend to be heavy and impervious, and both the physical and chemical properties of the soil become unfavorable for plant growth. Soils which are low in clay,
Soil structure is the size, shape and arrangement of mineral grains which form the soil mass. Soil structure is a major characteristic that influences all other engineering properties of the soil. Due to the processes of laterization, lateritic soils have attained distinct structural characteristics. It is an over-simplification to identify all temperate zone soils with dispersed structure and lateritic soils with concretionary structure (Remillon, 1967), lateritic soils may be on the whole more concretionary than most temperate zone soils.
The four components of soil works together to provide optimal conditions for water, air, and nutrients available for plant growth. Soil is made of air, water, mineral particles, organic matter, and organisms. Half of soil is pore space. Generally, pores are about half filled with water and half air, though the proportion varies greatly depending on weather, plant water use, and soil texture. Most of the solid portion of soil is mineral particles. Soil is basically the storehouse for the nutrients that plants need to survive. Dissolved minerals and water are absorbed into the plant’s root system, and is continually replenished from the store of nutrients in minerals and organic matter in the soil. Sometimes, nutrients may be added by farmers, by adding fertilizers once or more a year.
As agriculture has become more intensive, farmers have become capable of producing higher yields using less labour and less land. Growth of the agriculture has not, however, been an unmixed blessing. It, like every other thing, has its pros and cons. Topsoil depletion, groundwater contamination, the decline of family farms, continued neglect of the living and working conditions for farm labourers, increasing costs of production, and the disintegration of economic and social conditions in rural communities. These are the cons of the new improved agriculture.
Soil is the most important non-renewable resource on any farm. Healthy soil is key to a good
Soil erosion: Is the wearing away of topsoil- the nutrient-rich top layer of soil, by the natural physical forces of water and wind or through forces associated with farming activities. Soil erosion reduces cropland productivity and contributes to the pollution of nearby watercourses, wetlands and lakes.
Soil erosion occurs when soil is removed through the action of wind and water at a greater rate than it’s formed.
It is also known as soil contamination and is a result of acid rain, polluted water, fertilizers, pesticides or other hazardous chemicals. The pollution of soil is a common thing these days, and it happens due to the human activities. With the rise of concrete buildings and roads, one part of the Earth that we rarely see is the soil. However, it is definitely very important to us. The plants that feed us grow in soil and keeping it healthy is essential to maintaining a beautiful planet. But unfortunately, like all other forms of nature, soil also suffers from