Alina 10DApplications of fertilizersPlants, like humans, need regular feeding. If the balance of essential substances in the plant's body is disrupted, it begins to get sick and may die. To maintain this balance at the required level, you can add various fertilizers. What is fertilizer? Fertilizers – are substances used to improve plant nutrition, soil properties and to increase harvest. This essay will focus on the description of soils; types of fertilizers and reasons for their use; a description of a specific use of fertilizer to solve a soil quality problem. Generally, the soil is composed of:1. Mineral oil (50-60% of total)2. Organic substance (5-10%)3. Air (15-25%)4. Water (25-35%)There are 6 types of soil: Sandy - Grain size is divided into classes: very large (more than 3.5 mm) and large (3.0-3.5 mm), medium (2.0-2.5 mm), small (1.5-2.0 mm), very small (1.0-1.5 mm), fine (0.7-1.0 mm), very fine (0.7mm). Sand is the only soil type that contains the largest particles compared to the other five soil types. Loamy - contains proteins, fats, carbohydrates, nitrogen, phosphorus and Coli bacteria per 1 g of dry substance. However, the composition of silt depends on the composition of the wastewater, treatment systems and other factors. Clay – when wet it sticks to your hands but when dry it does not stick to your hands not. Here are the main minerals that clay contains: kaolinite, andalusite, kyanite and sillimanite, halloysite, gibbsite, diasporas, aluminum oxide, monotermit, montmorillonite, muscovite, nacrite, pyrophyllite. Peaty- is difficult to mix with clay. water, but once mixed is done it would be a nice soil for plant growth. It also contains acidic water which "fights" middle of paper......minerals>Russell, Sean. "Characteristics of Loam Soil | EHow." EComment. Demand Media, October 18, 2010. Web. November 16, 2013. .Kichura, Venice. "The Benefits of Loam Soil | EHow." EComment. Demand Media, November 24, 2010. Web. November 16, 2013. “Fertilizers and crop yields” BBC News. BBC and Web. November 16, 2013. “Environmental Benefits of Using Fertilizers.” » Agro Service International. Np, and Web. 2013. Whitman, Ann and Suzanne DeJohn. “How to assess soil composition.” - For dummies. Np, and Web. November 16. 2013. .