Fertility of land;ground [is] ability of land;ground to support growth of crop, [at] condition of appropriate environment and climate. To maintain production remain to make everlasting, hence way of to look after or maintain fertility [is] by creating usage of farm in a condition natural ekosistem ( Barrow, 1991, Maylinda al et cit, 2003).
According to Sitanala Arsyad ( 1989), land;ground conservation [is] location each;every land;ground area [at] way of usage matching with ability of the land;ground and memperlakukkannya as according to needed conditions in order not to happened damage of land;ground. Land;Ground conservation have hand in glove [relation/link] with water conservation. ( Beydha, 2002) Continueing system usage of farm very depend on its flexibility in a state of environment which continue to change. Existence of variety of sumberdaya high genetik [at] storey;level of usahatani will support this flexibility ( Reijntjes, 1999).
sasaran mendekati tindakan Beberapa pertanian of ; 2004) (Padmowijoto, berkelanjutan
1. More coming near [at] natural process, like cycle of hara, and N atmosphere fixasi.
2. Lessening usage of input of eksternal which cannot renew, potential destroy environment or menace health of consumer and farmer.
3. More productive in using biological potency and crop genetik and of species livestock.
4. Production more beneficial and efficient by emphasizing at management of[is effort integrately, and land;ground conservation, water, biological source and energi.
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