Answer:
Overlay is a GIS operation that superimposes multiple data sets (representing different themes) together for the purpose of identifying relationships between them.[2]. An overlay creates a composite map by combining the geometry and attributes of the input data sets. Tools are available in most GIS software for overlaying both Vector or raster data.
Explanation:
Before the use of computers, a similar effect was develioped by Ian McHarg and others by drawing maps of the same area at the same scale on clear plastic and actually laying them on top of each other.
Answer:
1. Native flora/plants. This is because native plants are best suited to live in the type of environment that they exist in, and its roots are used to stabilise soil erosion from water
2. Use terracing in farming, as the long slope is shorted into smaller groups of shot flatter slopes, reducing soil erosion
3. Planting cover crops, which are crops that grow horizontally, which form essentially a large cover over the soil, which prevents wind from blowing soil away
4. Strategically placed rocks or boulders can change the way water flows, which reduces the amount of soil erosion as it diverts the water to another direction.
In general, there are two methods of planting crops: direct seeding and transplanting. Direct seeding is either by broadcast, hill or dibble, or by drill method. The hill and the drill methods are alternative options in row planting.
Direct seeding or direct sowing is a planting method in which seeds are directly planted on the ground in the farm or any growing surface while transplanting makes use of pre-grown plants, seedlings or vegetatively propagated clones. The term transplanting is also used to refer to the practice of replanting in which an already established plant in one location is moved elsewhere.
Direct seeding generally applies to large-seeded vegetables as well as in cereals and grain legumes. Transplanting is most common with small-seeded vegetables, vegetatively propagated crops, ornamental crops, fruit trees and many perennial crops. The term direct seeding is also commonly used to refer to the planting of seedpieces or underground vegetative planting materials directly into the soil.
Broadcast, Hill, and Drill Methods of Planting Distinguished
Broadcasting or sabog tanim, or scatter planting, is the method of planting that commonly applies to small seeds, like rice and mungbean, that are capable of germination and sustained growth without soil cover. There is no control of plant-to-plant spacing. The seeds are simply distributed on a well prepared ground by hand or with a mechanical broadcaster.
With hand broadcasting, a volume of seeds is held by the hand and thrown with a wide swath. Skill is important to ensure even distribution of seeds per unit ground area based on the desired seeding rate per hectare. For example, a seeding rate of 100 kg per hectare means that the seeds have to be distributed at an average of 0.01 kg or 10 g per sq meter. Assuming that the crop is rice with a weight of 1000 grains of 29 grams, this is equivalent to a seeding rate of about 345 seeds per sq meter.
Excessive seeding per unit area will mean that the prepared seeds will have been completely sown but a portion of the farm is still unplanted, and so additional seeds need to be procured. Conversely, seeding below the average will complete the planting of the entire farm with some seeds still left.
The five distinct layers of the atmosphere based on the changes in temperature and the elements are:
The troposphere: This is the first and lowest layer of the atmosphere of the Earth. Most weather activities takes place here
The stratosphere: The stratosphere is the second layer of the atmosphere of the Earth. Ozone layer is found in the stratosphere
The mesosphere: The mesosphere is directly above the stratosphere. In this layer of the atmosphere, temperature decreases with increasing altitude
The thermosphere: This layer of the atmosphere is above the mesosphere and below the exosphere.
The exosphere: This is the outermost layer of Earth's atmosphere
<h3>What is atmosphere?</h3>
Atmosphere can be defined as layers of gases which envelope a planet
Learn more about the atmosphere:
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Explanation:
i can see any graph here, maybe u should put up the graph
