CONTENTS 



Note. The column headed " Date Completed " is to be filled in by the student as the exercise is completed; the column 

 headed " Approved " is to be filled in by the teacher. 



PART I. PLANT LIFE AND GROWTH 



Exircise Date Completed Approved Page 



i. The Beginning or Growth (t) 2 



2. How Plants Grow (i) 4 



3. How Plants Feed (g) 6 



4. The Seed as a Source of Plant Food (t) 8 



5. The Soil as a Source of Plant Food (i) 10 



6. The Air as a Source of Plant Food (i) 12 



7. How to Plant the Seed (i) 14 



8. When to Plant Seeds (i) 16 



9. How Some Plants Are Propagated without the use of Seed (i) . . 18 



10. Propagation by Budding and Grafting (i) 20 



PART II. THE SOn. AND ITS MANAGEMENT 



11. The Formation and Transportation of Soil (i) 22 



12. Collecting Soil Samples (i) 24 



13. The Physical Analysis of Soils (i) 26 



14. The Texture and Structure of Soils (i) 28 



15. The Tilth of Soils (i) 3° 



16. How Water gets into the Soil (i) 3 2 



17. The Film or Capillary Water of the Son. (i) 34 



18. The Movement of Film or Capillary Water in the Son. (i) . . . . 36 



19. The Soil Moisture which the Plants can use (g) 38 



20. The Effects of a Soil Mulch (g) 4° 



21. The Effects of Working a Soil too Wet (i) 4 2 



22. Soil Drainage (g) 44 



23. Soil Waste through Erosion (t) 46 



24. The Power of Soil to Take Up Plant Food from Solution (i) . . . 48 



25. The Acldity of Soils (i) 5° 



26. Plant Food removed by Crops (i) S 2 



27. Determining the Deficiencies of a Worn Soil (i) ■ 54 



28. Judging Soils (i) 5& 



29. The Management of the Soil (i) 58 



PART m. FIELD AND ORCHARD CROPS 



30. The Corn Plant (i) 60 



31. The Corn Flower (i) 62 



32. A Detailed Study of the Corn Kernel (i) <M 



33. The Butt and Tip Kernels of Seed Corn (i) ~ 



34. A Detailed Study of the Corn Ear (i) 



35. Scoring a Ten-Ear Sample of Corn (i) 7° 



36. Factors Determining the Yield of Corn (g) 7 2 



37. A Field Study of the Deficiencies of Corn Plants (g) 74 



38. Selecting Seed Corn from the Field (i) 7° 



39. Testing Seed Corn (i) 78 



[iv] 



66 

 68 



