effect of Eksternalitas in certain boundarys also relate to farm sumberdaya de¬gradasi which [is] its influence earn happened to production process. [At] agriculture farm [in] effect river headwaters of eksternalitas the interconnected to usually sliver with intensity enterpasing of farm which is on its it[him] very immeasurable ( Suwardjo and of Saefuddin, 1988).
Condition of immeasurable dry farming sumberdaya which [is] very and condition of climate which [is] have fluctuation [to] become factor of pemba¬tas determining technological implementation effectiveness storey;level [of] existing management ( P3Hta, 1987, Is¬Pandi, 1990; and Sembiring, 1990). Special in the case of land;ground conservation and water, constraint faced [by] [is] land;ground erodibilitas and of erosivitas very high rain, factor of le¬reng and of fisiografi ( Suwardjo and of Saefudin, 1988). In a condition like this hence land;ground conservation tin¬dakan have to dibarengi with intensification of usahatani and rehabilitate la¬han. One of [the] intensification effort of usahatani dry farming [is] with election of kultivar, arrangement of pattern plant entangling season crop and of tanam¬an annual, and also livestock of dibarengi with cultivation of grass / crop of hijauan pakan ( Anwarhan, Supriadi, and Sugandi, 1991).
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