EXERCISE No. 66 



DEPTH FOR PLANTING SEEDS 



Object : To determine the best depth for planting various 

 seeds. 



Material: Box of soil, olive bottle eight inches high or 

 Mason jar, so that plants may be observed. Twenty seeds 

 each of beans, peas, clover, oats, etc. 



Method :* Plant a few seeds of each kind at depths of J, 1, 

 2, 3, 4, 5, and 6 inches. Fill the jar with soil to within six 

 inches of the top and plant a few seeds. Put in another 

 inch of soil and plant more seeds. Continue this method 

 of planting until the jar is full, arranging the seeds in different 

 sized circles. Wrap a black cloth around the jar to exclude 

 the light. Record the date at which each comes up, and 

 tabulate results from the whole class record. 



DEPTH PLANTED 



BEANS 



PEAS 



CLOVER 



OATS 



CORN 



WHEAT 



RADISH 



^ inch 



1 inch 



2 inches, etc 



Conclusion: Which should be planted deeper, peas or 

 beans? Why this difference? In what way does tempera- 

 ture, character of soil, and amount of moisture influence 

 depth of planting? What is the purpose of rolling or "plank- 

 ing?" Is it more desirable with large or small seeds? In a 

 wet or dry season? 



*With a large class divide the work and give each division different kinds 

 of seeds. 



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