>

1 18 1777 1815 1817 1826 >

2 1890: 1900 1922 1979 >

3LDLR LDLR LDLR >

1 >

2 >

11. TP (total production)2. AP (average production) AP=TP/X X: 3. MP (marginal production) MP=TP/X = dTP / dX >

2 4. R (return ): 5. LR (land return): 6. (elasticity): MP/AP =TP/X/TP/X =TP/TPX/X = (dTP/TP)/(dX/X) >

>

1 : OQ():I,OI,1,, ;IN,1,,;():M,D;():OD; >

2: QR (): NT,10;(): DR0;(): D. >

3: R (): T,;(): 0;():

>

1,,,(),,, >

2,,

>

3,,,

>

4

>

3-1?

>

the degree of intensity): I=A+K+Z/ FIAKZF >

1intensive management) ,2intensive margin): MR =MC3extensive management): >

4extensive margin): MR =MC5margin of cultivation): >

>

()()()()()1010.010.01.0001.0002024.614.60.6840.8133045.020.40.4900.6674060.015.00.9650.6665071.711.70.8560.6976079.57.81.2820.7547083.54.02.5000.838 108.08.01.2501.2502020.012.00.8331.0003035.015.00.6660.8574046.711.70.8560.8565054.57.81.2820.917105.55.51.8181.8182015.510.01.0001.2903023.37.81.2821.2824026.83.52.8571.492

1land capacity): 2production efficiency):

>

3 >

3.:227,,,-:Y =17.116X10.146X20.709;Y;X1;X2.,,?.109.05,4264.13,15425.55,81930.06.

3.:E1 =(dy/y)/(dx1/x1) = (dy/dx)*(x1/y)=0.146E2 =0.709E1+E2=0.855

3-2 !