0
geography of
food
problems due to
intensifying food
production
due to
Irrigation
due to
Irrigation
SalinisationNaCl
due to
Irrigation
SalinisationNaCl
Waterlogging
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Euthrophication
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Water Pollution
Euthrophicati...
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Water Pollution
Euthrophicati...
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Water Pollution
Euthrophicati...
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Water Pollution
Euthrophicati...
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Water Pollution
Euthrophicati...
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Water Pollution
Euthrophicati...
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Water Pollution
Euthrophicati...
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Water Pollution
Euthrophicati...
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Water Pollution
Euthrophicati...
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Water Pollution
Euthrophicati...
due to
Irrigation
SalinisationNaCl
Waterlogging
Water from irrigation has salts
Crops
Water from irrigation has salts
Crops
Water from irrigation has salts
Crops
Salts are carried into the soil by water.
Salts are left behind after water dries up.
Salts are carried into the soil by water.
Salts are left behind after water dries up.
More irrigated water = more salts brought in
More irrigated water = more salts brought in
As the water dries up, more salts are left behind.
As the water dries up, more salts are left behind.
Over time, the too
much salt
accumulates in the
soil, and the soil
becomes salinised.
This prevents the
crops from growing.
Over time, the too
much salt
accumulates in the
soil, and the soil
becomes salinised.
This prevents the
crops from growing.
Over time, the too
much salt
accumulates in the
soil, and the soil
becomes salinised.
This prevents the
crops from growing.
Cross-section of a an area that is salinised.
The white crystals are salts!
due to
Irrigation
SalinisationNaCl
Waterlogging
due to
Irrigation
SalinisationNaCl
Waterlogging = Soil has too much water
due to
Irrigation
SalinisationNaCl
Waterlogging = Soil has too much water
due to
Irrigation
SalinisationNaCl
Waterlogging = Soil has too much water
Not enough air in soil
for crops to grow
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Water Pollution
Euthrophicati...
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Water Pollution
Euthrophicati...
due to
Chemicals
Imbalance
of soil nutrients
Water Pollution
Euthrophication
http://www.youtube.com/watch?v=UGqZsSuG7ao
Farmers tend to apply too much fertilisers
Excess fertilisers gets washed into rivers and lakes by rain
Excess nutrients i...
Excessive algae
Excessive algae
Excessive algae
Farmers tend to apply too much fertilisers
Excess fertilisers gets washed into rivers and lakes by rain
Excess nutrients i...
Farmers tend to apply too much fertilisers
Excess fertilisers gets washed into rivers and lakes by rain
Excess nutrients i...
Farmers tend to apply too much fertilisers
Excess fertilisers gets washed into rivers and lakes by rain
Excess nutrients i...
due to
Chemicals
Imbalance
of soil nutrients
Water Pollution
Euthrophication
humus
=
black stuff in soil
humus
=
decomposed organic
material
(plants, animals etc.)
humus
=
provides a variety
of nutrients in soil
humus
humus
=
provides a variety
of nutrients in soil
humus
humus
=
provides a variety
of nutrients in soil
humus
soil with humus soil without
humus
humus
=
provides a variety
of nutrients in soil
plants absorb a
variety of
nutrients
plants absorb a
variety of
nutrients
plants absorb a
variety of
nutrients
but chemical fertilisers only
replace Nitrogen and Phosphorus
but chemical fertilisers only
replace Nitrogen and Phosphorus
N
N
but chemical fertilisers only
replace Nitrogen and Phosphorus
N
N
P
P
but chemical fertilisers only
replace Nitrogen and Phosphorus
N
N
P
P
N
N
P
P
N
N
P
P
plants absorb a
variety of
nutrients
N
N
P
P
plants absorb a
variety of
nutrients
N
N
P
P
plants absorb a
variety of
nutrients
N
N
P
P
plants absorb a
variety of
nutrients
N
N
P
P
Soil left with a lot
of Nitrogen and
Phosphorus, but
not other
nutrients.
N
N
P
P
Soil left with a lot
of Nitrogen and
Phosphorus, but
not other
nutrients.
N
N
P
P
Soil left with a lot
of Nitrogen and
Phosphorus, but
not other
nutrients.
N
N
P
P
nutrients in soil
becomes
imbalanced
N
N
P
P
nutrients in soil
becomes
imbalanced
N
N
P
P
nutrients in soil
becomes
imbalanced
before - a variety
of nutrients
N
N
P
P
after - only a few
kind of nutrients.
problems due to
intensifying food
production
due to
Irrigation
due to
Irrigation
SalinisationNaCl
due to
Irrigation
SalinisationNaCl
Waterlogging
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Euthrophication
due to
Irrigation
due to
Chemicals
SalinisationNaCl
Waterlogging
Imbalance
of soil nutrients
Water Pollution
Euthrophicati...
Answer this question at m.socrative.com now
(room 9382)
1) Explain how the use of chemical fertilisers lead to soils
havin...
6  problems with intensification
6  problems with intensification
6  problems with intensification
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6 problems with intensification

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Transcript of "6 problems with intensification"

  1. 1. geography of food problems due to intensifying food production
  2. 2. due to Irrigation
  3. 3. due to Irrigation SalinisationNaCl
  4. 4. due to Irrigation SalinisationNaCl Waterlogging
  5. 5. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging
  6. 6. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients
  7. 7. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Euthrophication
  8. 8. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Water Pollution Euthrophication
  9. 9. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Water Pollution Euthrophication How to remember it better
  10. 10. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Water Pollution Euthrophication tating How to remember it better
  11. 11. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Water Pollution Euthrophication ty tating How to remember it better
  12. 12. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Water Pollution Euthrophication ty tating How to remember it better
  13. 13. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Water Pollution Euthrophication ty tating ly How to remember it better
  14. 14. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Water Pollution Euthrophication ty tating ly How to remember it better
  15. 15. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Water Pollution Euthrophication ty EKY tating ly How to remember it better
  16. 16. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Water Pollution Euthrophication ty EKY tating ly How to remember it better
  17. 17. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Water Pollution Euthrophication
  18. 18. due to Irrigation SalinisationNaCl Waterlogging
  19. 19. Water from irrigation has salts Crops
  20. 20. Water from irrigation has salts Crops
  21. 21. Water from irrigation has salts Crops
  22. 22. Salts are carried into the soil by water. Salts are left behind after water dries up.
  23. 23. Salts are carried into the soil by water. Salts are left behind after water dries up.
  24. 24. More irrigated water = more salts brought in
  25. 25. More irrigated water = more salts brought in
  26. 26. As the water dries up, more salts are left behind.
  27. 27. As the water dries up, more salts are left behind.
  28. 28. Over time, the too much salt accumulates in the soil, and the soil becomes salinised. This prevents the crops from growing.
  29. 29. Over time, the too much salt accumulates in the soil, and the soil becomes salinised. This prevents the crops from growing.
  30. 30. Over time, the too much salt accumulates in the soil, and the soil becomes salinised. This prevents the crops from growing.
  31. 31. Cross-section of a an area that is salinised. The white crystals are salts!
  32. 32. due to Irrigation SalinisationNaCl Waterlogging
  33. 33. due to Irrigation SalinisationNaCl Waterlogging = Soil has too much water
  34. 34. due to Irrigation SalinisationNaCl Waterlogging = Soil has too much water
  35. 35. due to Irrigation SalinisationNaCl Waterlogging = Soil has too much water Not enough air in soil for crops to grow
  36. 36. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Water Pollution Euthrophication
  37. 37. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Water Pollution Euthrophication
  38. 38. due to Chemicals Imbalance of soil nutrients Water Pollution Euthrophication
  39. 39. http://www.youtube.com/watch?v=UGqZsSuG7ao
  40. 40. Farmers tend to apply too much fertilisers Excess fertilisers gets washed into rivers and lakes by rain Excess nutrients in rivers and lakes due to fertilisers Encouraged the growth of algae
  41. 41. Excessive algae
  42. 42. Excessive algae
  43. 43. Excessive algae
  44. 44. Farmers tend to apply too much fertilisers Excess fertilisers gets washed into rivers and lakes by rain Excess nutrients in rivers and lakes due to fertilisers Encouraged the growth of algae Algae block the sunlight and compete for oxygen
  45. 45. Farmers tend to apply too much fertilisers Excess fertilisers gets washed into rivers and lakes by rain Excess nutrients in rivers and lakes due to fertilisers Encouraged the growth of algae Algae block the sunlight and compete for oxygen Plants at the bottom of rivers and lakes are unable to survive --> Die
  46. 46. Farmers tend to apply too much fertilisers Excess fertilisers gets washed into rivers and lakes by rain Excess nutrients in rivers and lakes due to fertilisers Encouraged the growth of algae Algae block the sunlight and compete for oxygen Plants at the bottom of rivers and lakes are unable to survive --> Die Plants then decomposes, removing more oxygen from the water, making it difficult for other animals to survive.
  47. 47. due to Chemicals Imbalance of soil nutrients Water Pollution Euthrophication
  48. 48. humus = black stuff in soil
  49. 49. humus = decomposed organic material (plants, animals etc.)
  50. 50. humus = provides a variety of nutrients in soil humus
  51. 51. humus = provides a variety of nutrients in soil humus
  52. 52. humus = provides a variety of nutrients in soil humus
  53. 53. soil with humus soil without humus
  54. 54. humus = provides a variety of nutrients in soil
  55. 55. plants absorb a variety of nutrients
  56. 56. plants absorb a variety of nutrients
  57. 57. plants absorb a variety of nutrients
  58. 58. but chemical fertilisers only replace Nitrogen and Phosphorus
  59. 59. but chemical fertilisers only replace Nitrogen and Phosphorus
  60. 60. N N but chemical fertilisers only replace Nitrogen and Phosphorus
  61. 61. N N P P but chemical fertilisers only replace Nitrogen and Phosphorus
  62. 62. N N P P
  63. 63. N N P P
  64. 64. N N P P plants absorb a variety of nutrients
  65. 65. N N P P plants absorb a variety of nutrients
  66. 66. N N P P plants absorb a variety of nutrients
  67. 67. N N P P plants absorb a variety of nutrients
  68. 68. N N P P Soil left with a lot of Nitrogen and Phosphorus, but not other nutrients.
  69. 69. N N P P Soil left with a lot of Nitrogen and Phosphorus, but not other nutrients.
  70. 70. N N P P Soil left with a lot of Nitrogen and Phosphorus, but not other nutrients.
  71. 71. N N P P nutrients in soil becomes imbalanced
  72. 72. N N P P nutrients in soil becomes imbalanced
  73. 73. N N P P nutrients in soil becomes imbalanced
  74. 74. before - a variety of nutrients
  75. 75. N N P P after - only a few kind of nutrients.
  76. 76. problems due to intensifying food production
  77. 77. due to Irrigation
  78. 78. due to Irrigation SalinisationNaCl
  79. 79. due to Irrigation SalinisationNaCl Waterlogging
  80. 80. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging
  81. 81. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients
  82. 82. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Euthrophication
  83. 83. due to Irrigation due to Chemicals SalinisationNaCl Waterlogging Imbalance of soil nutrients Water Pollution Euthrophication
  84. 84. Answer this question at m.socrative.com now (room 9382) 1) Explain how the use of chemical fertilisers lead to soils having an imbalance of nutrients Things to explore if you're done: http://livingheritage.org/green-revolution.htm http://www.youtube.com/watch?v=Lg9-HTtgFOk
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