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CONSERVATION SOIL TILLAGE AT RICE CULTURE IN ACID SULPHATE SOIL

 CONSERVATION SOIL TILLAGE AT RICE CULTURE IN ACID SULPHATE SOIL

R. Smith Simatupang and Nurita

IAARD Researchers at Indonesia Wetland Research Institute. (IWETRI)). Jl. Kebun Karet, lok Tabat. Banjarbaru –South Kalimantan. Email: rsmith_simatupang@yahoo.co.id

Abstract. Around 9.54 millions hectare of tidal swamp land is very potentially to be depeloped for agriculture to promotean increaseof national food production efforts. The limiting factors on rice production in this land werevery high ssoil acidity (soil pH less then 4.0), low soils fertility, nutrients deficiency, iron toxicity and socio-economic aspects. Land management through good and suitable land preparation application prepare a good soil conditation for rice plant so that can give good plant growth and increaseplant  production. The conservation soil tellage aimed to conserve land, particularly to oxidation of pyritensin soils so that can control an iron toxicity on rice. There are two conservation soil tillage on rce culture, i.e.: (1). Zero tillage by herbicide application and (2) full soil tillage with regulations. The conservation soil tillage wasone inovation  of land preparation which could be applied atrice culture in acid sulphate tidal swampland. No tillages by herbicides (paraquat or isopropel amina glyphosate) and full soil tillage with the regulationscould be controlled pyrite oxidation and iron toxicity on rice and increasedrice yields. Both technologiesof conservation siol tellage could be developed to supportincreaseof  rice production efforts in the acid sulphate soils.

Keyword: Conservation soil tillage, soil tillage, production, Acid sulphate soil

 

INTRODUCTION

An agriculture sector until now is still holding an important role on national economic development. This sectors is very important to supportgrowth of economic region, as people income resource, to give a fileld and opportunity of work for publics and to realize a national foods sufficiency because of Indonesia as agrarian country (Saryana et al. 2008). A few efforts have been conducted to achieved a sustainable foods sufficiency, particularly the effort of increasing rice production about 5%/year that have been conducted throughout increasing national rice production program (P2BN) That have been  implemented since 2007 (Badan Litbang Pertanian 2007).

                In Indonesia, tidal swampland is very wide that may reach about 20.1 millions hectare founded in four island, I.e Sumatera, Kalimantan, Sulawesi and Papua. Around 9.54 millions hectare was very potential to be extended for agricultural development, abaut 3.0 millions hectare had been reclamaized  by local fermers and about 1.18 millions hectare by goverments throughout a transmigration placement programme (widjaya-Adhi et al. 1992; Badan Litbang Pertanian 2007).

The tidal swampland is included as submarginal land because it has a low potency to grow an agriculture plants. Nevertheless, with application of suitable technology and thue managements system, the potency of tidal swampland canbe inraesed to become more productive land to support sustainability of human live.