Vol 31, No 1 (2008)

Forum Pascasarjana

Table of Contents

Articles

Forum Pascasarjana
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Benar Darius Ginting, Muhammad Syamsul Maarif, Surjono H. Sutjahjo, Hermanto Siregar
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One of the important factors for the management activity at Salak Mountain is the presence of Salak Mountain’s vegetation classification, which until recently has never been done. The research objectives were to classify the variety of vegetation types at Salak Mountain. Vegetation sampling was made with systematic sampling with random start. Vegetation type at alliance level was determined with vegetation ordination. Three vegetation alliances can be extracted from the ordination. These alliances are Shcima walichii-Pandanus punctatus/ Cincora sinensis forest alliance; Glocidion apus-Mallotus blumeana/Chima sinensis forest alliance; and Pinus merkusii-Dysoxiylum arborescens/Dysoxiylum dichotoma forest alliance. Vegetation alliances are forming mainly because of their similarity in their structure, composition, and physiognomy of vegetation. The abiotic factors that consistently differentiate alliance 1 with the other alliances are N total, dust content of the soil, and slope. P soil’s content is the abiotic factor that consistently differentiates alliance 2 with the other alliances, while C organic soil’s content and cation exchange capacity of the soil are the abiotic factors that consistently differentiate alliance 3 with the other alliances. There are five vegetation association at allinace 1, six alliance 2 and seven at alliance 3. Each dominant spesies has uniquely preference to abiotic factor in their distribution at Gunung Salak. Stand structures of alliance 1 and 3 forming J reverse curve.

 

Key words: association, ordination, Salak Mountain, vegetation alliance, vegetation classification
Muhammad Wiharto, Cecep Kusmana, Lilik Budi Prasetyo, Tukirin Partomihardjo
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Fajriyati Mas’ud, Tien R. Muchtadi, Purwiyatno Hariyadi, Tri Haryati
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Widyo Astono, Muhammad Sri Saeni, Bibiana Widyawati Lay, Soepangat Soemarto
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Integrated crop-livestock systems program with special reference to rice field and beef cattle is a potential alternative to support the development of agriculture sector in Indonesia.  The implementation on this integrated program was to enhance rice production and productivity through a system involving beef cattle with its goal on increasing farmers’ income.  The impact of integrated crop- livestock systems program to household economy farmers was studied in order to identify factors influencing behavior of farmer’s decision-making along with its interrelation between factors.  Impact of changes due to the external policy options was also assessed and farmer’s characteristics were described descriptively.  Five districts in the province of DIY, Central Java and East Java with 274 farmers were purposively used in the study. Simultaneous equations model with two SLS method was used to estimate the parameter, followed by the non-linear simulation approach.  The results show that most of the explanatory variables significantly affected to its endogenous variables.  Rice production is responsive to harvested land area which influenced by its volume of input rice derived demand.  The volume of its input derived demand also influences cattle and compost production.  Family labor utilization for rice and cattle production and their time allocation on non-farm and off farm jobs are related to each other. Input price of rice and live cattle are affected to their derived demand function.  Rice consumption is responsive to its price which the lower the price, the higher its consumption.  Credit on crops farm that has to be paid by farmers is also responsive and positively related to its commercial credit rate.  Effect of a 10 percent increase on output and input price of production rice, cattle and compost will increase their production; hence will also increase farmers’ income and the expenditures. This will apply to farmers that involved in a program of integrated crop-livestock systems.  On the other hand, alternative policy of combination between a 10 percent increase of output price along with 5 percent increase on its input price yield in the increasing production for farmers that are not involved in the crop-livestock systems program, hence will also increase the income.

 

Key words: household economics, simulation analysis, crop-livestock systems

Atien Priyanti, Bonar M. Sinaga, Yusman Syaukat, Sri Utami Kuntjoro
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Joice R.T.S.L. Rimper, Richardus F. Kaswadji, Bambang Widigdo, Nawangsari Sugiri
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Gina Gina Bachtiar, Surjono Surjokusumo, Naresworo Nugroho, Yusuf Sudo Hadi
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Forum Pascasarjana
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