Nathan on the other hand is an organic farmer he does

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Question 3 of 7 4.0 Points Nathan, on the other hand, is an organic farmer: he does not use artificial fertilisers, and instead carefully assays the soil: the pH is 7.8, but it is low in nutrients, so he supplies his vegetables abundant bone meal ( for HPO4 2- ) and manure (for K + , Mg 2+ and NO3 - ). Despite this apparently healthy diet, his plants show signs of both nitrogen and phosphorous deficiency. Which of the following is the most likely explanation for this? A. the pH of the soil is too high B. the pH of the soil is too low C. he has over-fertilized and damaged the roots D. they are not getting enough water Reset Selection Mark for Review What's This? Question 4 of 7 4.0 Points Some years ago, Monterey Pine Trees were introduced to New Zealand by seed. Adult trees did not grow well in New Zealand unless they had been germinated in soil from Monterey. What is the most likely explanation?
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5/20/13 4:18 PM 2013 Problem Set 7 Plant Biology Lectures 3-7 Page 12 of 13 https://coursework.stanford.edu/portal/tool/1c2f43e9-1653-4e97-98f7-93a4fbb2cb09/jsf/delivery/beginTakingAssessment Reset Selection Mark for Review What's This? Question 5 of 7 4.0 Points So far as we have been able to establish up to now, cobalt (Co) is not a required nutrient for higher plants in general. However, some years ago it was found that when clover plants (which are legumes) were grown in a soil that contained no combined nitrogen (i.e., no NO3 - or NH4 + ) the plants would grow only if the soil contained small amounts of Co 2+ . Suggest a likely explanation. Reset Selection Mark for Review What's This? Question 6 of 7 4.0 Points Fill in the two blanks in the following sentence. ___________________ are available to the plant in unlimited supply _____________. Reset Selection Mark for Review What's This? Question 7 of 7 4.0 Points A root that is in a microenvironment deficient in a nutrient A. usually dies B. directs growth to find the nutrient in the soil C. does not change D. will grow towards light E. secretes basic compounds into the soil.
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5/20/13 4:18 PM 2013 Problem Set 7 Plant Biology Lectures 3-7 Page 13 of 13 https://coursework.stanford.edu/portal/tool/1c2f43e9-1653-4e97-98f7-93a4fbb2cb09/jsf/delivery/beginTakingAssessment Reset Selection Mark for Review What's This? Save Exit Assignment Preview - This is an example student view of this assignment done
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