E. TUHERKIH
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THE EFFECT OF SILVY PASTURAL SYSTEMS ON CARRYING CAPACITY AND SOIL PROPERTY OF GRASS LAND SUKRISTIYONUBOWO, .; WIGENA, I GEDE PUTU; TUHERKIH, E.; MARYAM, .; SANTOSO, D.
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 18 (2000): Desember 2000
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n18.2000.%p

Abstract

This experiment was the last activity of soil-crop management experiment to improve quantity and quality of fodder of grass land. This experiment has been carried out since 1994/1995 cropping season in Selengen Village, Lombok 8arat District, West Nusa Tenggara. In 1998/1999 the observation was focused on carrying capacity and soil properties. Feeding through grazing and cut and carry was applied to measure the carrying capacity. The experiment used randomized complete block design and the treatments  were arranged to split split plot design replicated four times. The main-plot treatments were (1) with wind breaker and (2) without wind breaker. The sub-plot treatments were four combinations of native grass land, introduced grass, and introduced legume: (A) native grass land, (B) native grass land + Paspalum sp.,(C) native grass land + Arachis gambrara, and (D) native grass land + Paspalum sp. + Arachis gambrara. The sub-sub-plot treatments were (a) grazing and (b) cut and carry. Furthermore the combination between treatments with wind breaker (1) and native grass land +Paspalum sp. +Arachis gambrata (D) was called silvy-pasture system, while the combination between treatments without wind breaker (2) and native grass land (A) was named native grass land. The results indicated that the highest fresh fodder production and carrying capacity both for the first and second harvesting were shown by the silvy-pasture system. The yields were 35.01 and 28.47 t/ha for the first and second harvesting, respectively. Meanwhile, the carrying capacity of the first harvesting using grazing and cut and carry were 1.47 and 1.75 cattle/ha/year with increasing life weights were 0.46 and 0.29 kg/day, respectively. For the second harvesting, the carrying capacities were 1.10 and 1.16 cattle/ha/year with increasing life weight about 0.28 kg/day, respectively. Introduction of Paspalum sp. and Arachis gambrata significantly improved carrying capacity of native grass land.
EFFECT OF COMPACTED COMPOUND SLOW RELEASE FERTILIZER TO IMMATURE OIL PALM GROWTH AND YIELD ON XANTHIC HAPLUDOX, IN MERANGIN, JAMBI WIGENA, I GEDE PUTU; PURNOMO, J.; TUHERKIH, E.; SALEH, A.
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 24 (2006): Desember 2006
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n24.2006.%p

Abstract

Oil palm is one of promoted plantation commodity that is developed intensively by the government. This phenomena need to be supported by an appropriate management mainly the fertilization aspects to maintain its productivity at high level. Field experiment has been conducted to test the effect of the compacted compound slow release fertilizer, formulated in stick fertilizer, to immature oil palm growth and fruit bunches production on Xanthic Hapludox from 2003 to 2005. Seven fertilization treatments, namely farmer?s practice (A); recommended fertilization (B); controll (C); 1 fertilizer stick/trunk (D); 2 fertilizer sticks/trunk (E); 3 fertilizer sticks/trunk (F); and 2 fertilizer sticks combined with foliar fertilizer (Fosfo N)(G) have been tested on the experiment. All treatments were arranged in randomize complete block design with three replications. The result showed that the tested fertilizer could improve oil palm growth and increased fruit bunches production significantly. The highest yield was provided by 3 fertilizer stick/trunk (G) with growth scoring 90.30% and 31.43 kg of fruit bunches/trunk. This yield was significantly different with all others tested treatment, except recommended treatment (B) with growth scoring and fruit bunches were 87.30% and 30.57 kg/trunk/month, respectively. Compared to the recommended treatment, the application of the tested fertilizer could decrease the total fertilizers required by the farmers due to the increasing of fertilization efficiency about 50-60%. Based on nutrients dynamic and number of fertilizers required by oil palm, the existing recommended fertilization should be changed in order tomaintain nutrient balance in the soil. The proposed changes of recommended fertilization is by increasing of potassium dosage because oil palm absorp potassium at the highest number from the soil. Besides that, sulfur should be applicated due to the higher absorption by the crop from the soil, whereas the highly weathered soil has lower capacity in supplying sulfur for crop growth so that sulfur is adsorp extensively from the soil and causes imbalance nutrient in the soil.