Entisols had a great potential for maize planting area expansion in increasing its production. The low soil fertility could be improved by application of coastal sediment. This current research examined the effect of different amount of coastal sediment on nutrient availability and maize production on Entisols, West Kalimantan. The research was conducted from July to November, 2013 in green house, Faculty of Agriculture, Tanjungpura University, West Kalimantan. The treatment conducted was the application of coastal sediment at dosage of: 0 Mg ha-1 (L 0), 14 Mg ha-1 (L 1), 28 Mg ha-1 (L 2), 42 Mg ha-1 (L 3), 56 Mg ha-1 (L 4), 72 ton ha-1 (L 5), 86 Mg ha-1 (L 6) and 100 Mg ha-1 (L 7). The treatments were arranged by completely randomized design with 3 replications. Research results showed that 42 Mg ha-1 coastal sediment was the best treatment and able to increase soil nutrients availability and maize productivity. The provision of coastal sediment increased the availability of K, Ca, Mg and Na, also the availability of nutrients in accordance with the increase of the dosage of coastal sediment.
The high soil acidity and low nutrient content in the peatland may inhibit the growth and yield of shallot and result low productivity. As consequence, the use of peat as a growing medium needs soil fertility improvement. One alternative to improve soil fertility, growth and yield of shallot is by applying coastal sediment and foliar seaweed extract which are easy to obtain and relatively inexpensive in West Kalimantan. This study aimed to investigate soil chemical properties, growth and yield of some shallot variety after the application of coastal sediment and foliar seaweed extract (Eucheuma cottonii). A field trial was carried out through the wet period of 2014 in West Kalimantan, Indonesia. The foliar seaweed extract was applied as the foliar fertilizer (0 and 3%), meanwhile the addition of coastal sediment was done at doses of 0 and 40 t/ha. The application of coastal sediment of 40 t/ha improved some chemical properties i.e. pH and the availability of K, Ca, Mg and Na of peat soil. The combination of foliar seaweed extract with 3% and 40 t/ha of coastal sediment increased growth and yield of all shallot variety in peatland compared to using foliar seaweed extract or coastal sediment only.
Entisols had a great potential for maize planting area expansion in increasing its production. The low soil fertility could be improved by application of coastal sediment. This current research examined the effect of different amount of coastal sediment on nutrient availability and maize production on Entisols, West Kalimantan. The research was conducted from July to November, 2013 (L 6 ) and 100 Mg ha -1 (L 7 ). The treatments were arranged by completely randomized design with 3 replications. Research results showed that 42 Mg ha -1 coastal sediment was the best treatment and able to increase soil nutrients availability and maize productivity. The provision of coastal sediment increased the availability of K, Ca, Mg and Na, also the availability of nutrients in accordance with the increase of the dosage of coastal sediment.
<p>Expansion of new paddy land for rice in the tidal area is still experiencing problems, especially their toxic concentrations of Fe which can affect soil productivity. Efforts to improve the productivity of the newly opened paddy fields of tidal swampland are with drainage and specific nutrient management. The purpose of this research is an effort to increase the productivity of land through drainage management and application of ameliorant against iron toxicity in rice at the newly opened tidal swampland. The experimental design used was a Randomized Block Design is repeated 5 times. The results showed that technology of 1 week drying and 1 week inundation, limed 2 t ha<sup>-1</sup> and fertilized N 112.5 kg ha<sup>-1</sup>, P<sub>2</sub>O<sub>5</sub> 22.5 kg ha<sup>-1</sup>, K<sub>2</sub>O 67.5 kg ha<sup>-1</sup> and organic materials by 5 t ha<sup>-1</sup>, can increase rice yields by 237% from 1.40 t ha<sup>-1</sup> to 4.72 t ha<sup>-1</sup> of dry milled grain and can reduce 50% of Fe in the soil content of 384 ppm to 192 ppm in the newly opened paddy fields of tidal swampland in dry season. While the rainy season, technology of 1 week drying and 2 week inundation, limed 2 t ha<sup>-1</sup> and fertilized of N 86.25 kg ha<sup>-1</sup>, P<sub>2</sub>O<sub>5</sub> 30 kg ha<sup>-1</sup>, K<sub>2</sub>O 15 kg ha<sup>-1</sup>, and organic materials by 5 t ha<sup>-1</sup>, can increase rice yield 272 % from 1.21 t ha<sup>-1</sup> to 4.50 t ha<sup>-1</sup> of dry milled grain and can reduce 51.88% of Fe in the soil content of 1,168 ppm to 769 ppm. </p>
Hasil jagung manis di Indonesia per hektarnya masih rendah. Untuk mendapatkan hasil yang maksimal, maka selain pupuk anorganik, tanaman jagung manis membutuhkan pupuk organik. Salah satu sumber pupuk organik adalah pupuk kandang kambing karena kambing merupakan bagian integral dari sistem usahatani yang diterapkan di pedesaan. Kandungan hara yang rendah dari pupuk kandang kambing menyebabkan kebutuhan per hektarnya menjadi sangat banyak dan kesulitan dalam penggadaannya. Untuk itu perlu dilakukan pengkayaan dengan menggunakan batuan fosfat, dan zeolit. Sementara itu, nilai estetika pupuk organik diatasi dengan membentuk pupuk granul. Percobaan pengujiaan efektivitas pupuk organik di lapangan dengan menggunakan Rancangan Acak Kelompok (RAK) faktor tunggal dan diulang 3 kali. Hasil penelitian menunjukkan bahwa pengkayaan pupuk kandang kambing dengan BFA atau Zeolit dapat meningkat nilai pH, kadar C-organik dan bahan organik tanah. Zeolit meningkatkan pertumbuhan tanaman Jagung Manis pada parameter tinggi tanaman dan jumlah daun, sedangkan BFA meningkatkan diameter daun. Takaran Zeolit 4,5% dapat menghasilkan berat dan panjang tongkol paling tinggi dibandingkan perlakuan lainnya.
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