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The purpose of this research was to determine the effect of rice husk of biochar combined with inorganic and organic amendments on soil strength, growth and yield of rice plants on acid sulphate soils. The research phase was to identify the physical properties of soil in both regions and the measurement of field penetration resistance. Furthermore, conducting field research using a randomized block design (RBD), with the treatment consisting of; control soil (B0), rice husk biochar 6 t.ha-1 (B1), rice husk biochar 8 t.ha-1 (B2), rice husk biochar 10 t.ha-1 (B3), rice husk biochar 12 t .ha-1 (B4), recommended inorganic fertilizer package (B5), recommended inorganic fertilizer package and rice husk biochar 10 t.ha-1 (B6), 10 t.ha-1 (B7) manure fertilizer 10 t. ha-1 and rice husk biochar 10 t.ha-1 (B8). The research observations consisted of several physical properties of soil in BPTP land and farmer's land. Field penetration resistance is measured by determining the value of soil strength (DAIKI). Observation of growth variables in the maximum vegetative phase, consisting of; plant height and a number of tillers, while the yield variable is; a number of panicles per clump, and dry grain weight per clump. The results showed that the strength of the soil in the Experimental Field of BPTP West Kalimantan was 470 kPa and the farmer's land was 500 kPa. This condition indicated high soil compaction in paddy-based acid sulphate fields in the West Kalimantan Sungai Kakap.

People's perceptions of land clearing by burning are still diverse, there are pros and cons about it. As we all know, the land clearing system by slashing and burning is a heritage and culture of farming communities in almost all parts of Indonesia, one of them is the people of the island of Kalimantan. Several solutions have been proposed by the government, including land clearing without burning (PLTB). This program aims to change the behavior of Indonesian farmers who still do land clearing by burning to switch to more environmentally friendly land clearing methods, including converting slashes into compost and wood vinegar. However, until now several programs launched by the government in order to minimize the forest and land fires have not been successful. Increasing the production of hybrid corn commodities is one of the targets for increasing agricultural productivity in West Kalimantan, especially in Singkawang in meeting the demand for hybrid corn which is currently supplied from outside the city. The increase in production cannot be separated from the need for expansion of hybrid corn farming land, which currently the number and focus of increasing hybrid corn farming businesses are in Sagatani Village, South Singkawang District. Problems arise when in their business, hybrid corn farmers in Sagatani Village still use conventional methods in cleaning and clearing land, namely by burning.

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Penelitian ini dilakukan dengan tujuan menganalisis Dampak Sosial Pembangunan Hutan Tanaman Industri Terhadap Kehidupan Masyarakat Di Dusun Nanas Kecamatan Siantan Kabupaten Mempawah. Terlebih pada kehidupan sosial masyarakat di dusun nanas sebagai dusun yang terletak paling dekat dengan pembangunan Hutan Tanaman Industri (HTI) tersebut. Metode yang dilakukan dalam penelitian ini adalah metode deskriptif, dengan pendekatan in depth interview yaitu dengan mewawancara secara mendalam terhadap 10 responden kunci yang terdiri dari Ketua RW dan RT, Tokoh Masyarakat, beberapa warga terpilih serta beberapa karyawan perusahaan HTI setempat. Hasil penelitian yang didapat yaitu terdapat beberapa dampak sosial yang terjadi di dusun tersebut setelah pembangunan HTI ini dapat dilihat  dari bantuan dan fasilitas yang sudah diberikan oleh pihak perusahaan kepada masyarakat dusun nanas seperti fasilitas umum, fasilitas sosial, bantuan sarana dan prasarana dan lain-lain dimana semua faktor dianalisis secara deskriptif untuk dilihat dampak sosial yang terjadi terhadap masyarakat di dusun nanas tersebut.