Some two-thirds of the solar energy reaching the Earth is absorbed by water on or near the Earth's surface.
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Question 2The forestry industry uses fertilizers most often to treat old growth stands that will produce valuable lumber.
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Question 3For most soils, even if they test high in a nutrient such as potassium or nitrogen, it is necessary to apply at least as much of each nutrient as is removed in the harvest, if the soil is not to eventually become infertile and unproductive.
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Question 4Soil test interpretations have been developed so that for most fields testing high in a nutrient, addition of that nutrient will not increase yield enough to more than pay for the cost of applying the nutrient.
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Question 5To enable the most consistent and appropriate interpretations, all soil samples submitted to a particular soil test lab should be taken from the same soil depth, regardless of differences in the type of tillage used or plants grown.
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Question 6Many years of research have confirmed that the quadratic (parabolic curve) model is the best method of making fertilizer recommendations based on response curves, especially if environmental quality is a high priority.
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Question 7Land application of treated sewage sludge is an effective means of recycling nutrients back to the soil from which they were originally taken.
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