111. What are productive soils? 112. What do productive soils depend on? 113. Pr

Question

111. What are productive soils?

112. What do productive soils depend on?

113. Productive soils cover what percentage of the Earth’s land surface?

114. Productive soils produce what percentage of the world’s food?

115. Moderate desertification results in reductions of crop yields by what percentage?

116. Severe desertification results in reductions of crop yields by what percentage?

117. Very severe desertification results in reductions of crop yields by what percentage?

118. In the past few decades, about what percentage of the world’s farmland has been at least moderately desertified?

119. How many people are estimated to live in arid lands that are vulnerable to desertification?

Explanation / Answer

111.Productive land through soil conservation begins with an understanding of the relationship between the land itself and its nutrients. Nutrient rich land nurtures the plant throughout the growing season until it produces seed. Forages need key elements in the root zone to grow optimally produce enough forage to meet the nutritional requirements of the grazing animal). Those main elements are: N (Nitrogen) P (Phosphorus) K (Potassium) pH (Lime Index)

112.

113.12.5%

114.75%

115.40-41%

116.40-50%

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