Gertjan Holshof

Agricultural and Biological Sciences

1. Dairy Cows 100%
2. Lolium perenne 78%
3. Cow 67%
4. Grazing System 53%
5. Methane 50%
6. Clover 46%
7. Urea 40%
8. Grassland 28%
9. Grass Silage 28%
10. Plantago lanceolata 26%
11. Concentrates 26%
12. Growing Season 26%
13. Trifolium repens 24%
14. Meadow 23%
15. Milk Production 23%
16. Essential Oil 23%
17. Genetic Trend 23%
18. Chicory 23%
19. Protein Concentrates 23%
20. Forage Crop 23%
21. Soil Organic Matter 23%
22. Genetics 23%
23. Greenhouse Gas 18%
24. Feed Quality 15%
25. Carbon Dioxide 13%
26. Sandy Soil 12%
27. Nutrient Balance 12%
28. Linear Programming 12%
29. Stocking Rate 11%
30. Ammonium Nitrate 11%
31. Mowing 11%
32. Isotopes of Calcium 11%
33. Roughage 10%
34. Animal Manures 7%
35. Mineral Fertilizers 7%
36. Barn 7%
37. Legislation 7%
38. Grassland Management 7%
39. Biodiversity 6%
40. Nutritive Value 6%
41. Peat Soil 5%
42. Milk Quality 5%
43. Soil Property 5%
44. Protein in Feed 5%
45. Milk Yield 5%
46. Body Weight 5%
47. Food Intake 5%
48. Feed Efficiency 5%
49. Least Squares Method 5%
50. Weather 5%