3.4 Soil nutrient absorption rate and soil nutrient
use economic efficiency ratio
Data of the agricultural land use economic outputs, plant
nutrient update, and input of fertilizers are shown in
Table 4. For different agricultural land use types, the
calculated values of nutrient absorption rate (NAR) and
nutrient use economic efficiency ratio (NEER) are listed
in Table 5. For both N and P, the NAR values in cropland
and vegetable field are higher than that in the orchard,
and the order is cropland > vegetable field > orchard.
Compared with P, the absorption rate of N is a
relatively higher in the three agricultural land use types.
The NARs in vegetable field and orchard are lower
than that in the cropland, and the NEERs show the op-