The most important mineral nutrients added to soils in fertilizers are
A. nitrogen, phosphorous, and potassium.
B. calcium and nitrogen.
C. magnesium, phosphorus, and iron.
D. sulfur.
E. calcium carbonate.
A. nitrogen, phosphorous, and potassium.
When you look on the back of a package of fertilizer, you will see the three most important nutrients listed as the NPK ratio. This tells the consumer the amount of nitrogen, phosphorus and potassium contained in the product.
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____________________, such as ulcerative colitis and Crohn disease, develop when bacteria are able to breach the barrier between the digestive system and the body
Fill in the blank(s) with correct word
Pioneer plant species are usually characterized by
a. small size. b. high dispersal rates c. slow maturation. d. high dispersal rates and high numbers of offspring e. small size, efficient dispersal mechanisms, and slow maturation.
Sensory signals that trigger release of saliva are an example of how the nervous system works with
which other system? a. endocrine b. cardiovascular c. sensory d. digestive e. muscular
Refer to Figure 40-4. Which of the following represent the correct sequence for contraction to occur in
this muscle cell? a. nerve stimulus, 4, 5, 3, 2, contraction b. nerve stimulus, 4, 5, 2, 3, contraction c. nerve stimulus, 4, 3, 5, 2, contraction d. nerve stimulus, 5, 3, 2, 1, contraction e. nerve stimulus, 5, 2, 3, 1, contraction