Thursday, April 10, 2008

Optimalisasi Produktifitas Lahan Kering melalui Pengembangan Sistem Usahatani Konservasi Tanaman Jagung di Provinsi Gorontalo

Nurdin


Abstract: Up land in Gorontalo Province widely 36% by totals area where
planting for crops such as miaze. Maize besides as a second food matter so
become a comodities establishment to Agropolitan Programe in Gorontalo
Province. Until 2004 years, the maize production up to 700.401 ton or increase
164,79% from last years. But, many farmers to cultivation in land sloped
without water and soil conservation. Therefore, the degradation and erosion is
bigger and impacted to maize farming sustainibility and Agropolitan Programe
while developing. In additional, 70% from 1,3 million hectare of Gorontalo
Province wides are sloped area where extreamly and big probable for become
erosion and sedimentation on fastly relative time. This area insite to E2
Agroklimatly Zone so it is a up land of dry climate with ustic moisture regim.
The landform of this area is punggung sungai and river terrace, plat topographic
to extreamly with dominantly land use are mix plantation. The ordo of soil are
asosiation of Ultisol with parent materials is batuan kapur. The soil fertility
status is low so needed strategy management for it. Mulcing and manure
showing significant effect to maize production in countur cropping accord. The
manure dosage that recomended are 10 ton/hectare and 9 ton/hectare for
mulcing. Besides, the recomended for strip cropping are 2,5 ton/hectare for
manure and mulcing are 9 to 12 ton/hectare. from production aspect, the countur
cropping more effective than strip cropping. Although, from water and soil
conservations the strip copping more effective than countur cropping. The
conclusion of all that countur cropping more effective than strip cropping.
Keywords : Zea mais L., up land, conservation farming system

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