6.7 Analyzing The Science

The following table shows six tropical forests, arranged from least to most fertile soils, estimated from total soil nitrogen.

Parameter Lower montane rainforest, Puerto Rico Amazon caatinga, Venezuela Oxisol forest, Venezuela Evergreen forest, Ivory Coast Dipterocarp forest, Malaysia Lowland rainforest, Costa Rica
Above-ground biomass (metric tons/ha) 228 268 264 513 475 382
Root biomass (metric tons/ha) 72.3 132 56 49 20.5 14.4
Total soil nitrogen (kg/ha) –– 785 1697 6500 6752 20   000
Turnover time of leaves (years) 2 2.2 1.7 –– 1.3 ––

111

INTERPRETATION

Question 6.13

BWUKzsW3Qlfw80PbrjZs7iaENHU2Y5pwX4MmcsSVgclDKcbW2alm6Eaa7Ix4g5XAyLyHEwslgR2gL3ufkBSOdLlW9WZ6W6bkcU3W5elLfD0=

Question 6.14

Q/zYd0XJqZh8wiWNLz882+aIDmtquOYbldU7zXzYvmgUEX+7GyA/75UiB/t0uOSsf1QyI5BE8EjH3qcWNem2VcF5/J6/13djtMARfx3otFf1u9f3MYSBxJQXS/o8/xNSp+icbHH4UcpJBCV7BHRwx0ITG35oyx2R4wKhnYzjhHS4hon7rL/AnGJ2wv1w4YUEqlOdUA==

Question 6.15

izD6Wg1gvqCxpGE4mufGpdwLw2/v7uTKM6rsvP2AktfxRZAhUNjB9B+aXgtz5BwMuBEx95FosO6x8z5uKIERBYuWc3WlwFr2XGo2nAWrS4Sj7MlMt7cDCUyTBYM=

ADVANCE YOUR THINKING

Question 6.16

RZ+ig5iF5y3WpluFdQbjAsKTBoylqeLPPYUIfIkLaXRyDmAb+CKwnSya3xyjJU4GdhTqzzHEnjjd12PwlQPk4fU/9ClZyu9IobyxPOSuFt+NHCUv+KpaiqHAKjbWxIoS1xj1uCueZxd6S4V/3D0joHu5C/tal31rKcrlTIEiTgPBWqRH3EqBJx4UFvUc596+oIcmnIO/XjIrtMD0HHqMOg==

Question 6.17

FjNNnQlIwc4A1w9EVqMeA2HPq4R7zAxB/nqoKhM79SLSBbf4Ny8d+r5WVy+fJalN1XmEYb1ST1y/1ORSSDhOmL1N0Qs0rxYD8QgTSVtZ13yWKJPbq7wJHzhSm6D7X3E8du5UZMk6iDfbLYKn51hH4e7DdCcVrEF9vzmo2nLYFLOQ13eWLViJzJz3qy7CRr3zVRJSTFK/Nh9RfEMR7aOfgqREpaHw7o25bo6BMwMpXnMYVj96reglAtkZMPfIhdxUSoe62RcxGf6QJNobvluEv/8ws5reLTsYX2ajhO2XyZ1nQ3Vhhro9X7yJegkd+VX6