Effects of deep tillage and fertilization on the population, growth and yield of soya during an exceptionally wet season on a compacted sandy loam, Santa Cruz, Bolivia

Orellana, Mabel; Barber, R. G.; Díaz, Oscar

doi:10.1016/0167-1987(90)90005-x

Cited by 7 publications

(2 citation statements)

References 2 publications

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“…Nitrogen is a chlorophyll component, and it promotes vegetative growth and green coloration of the foliage. This research is supported by previous research ( Orellana, & Barber, 1990) reported that fertilizers can increase the number of leaves and branches in soybean.…”

Section: Number Of Leavessupporting

confidence: 87%

Soybean Yield Optimization by Utilizating the Solid Waste of Oil Palm Factory

Duaja

Kartika

Gusniwati

et al. 2022

Agric

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Soybean is planted in some types of land agroecology, but production centers are mostly on peat and tides. This research was conducted at the soybean center in Rantau Rasau District with agroecology peat and tideland. The trial was arranged in a Randomized Block Design (RBD) with ten treatments and four times repeatitions. It consisted of several doses of organic material decanter cake (DC) and the percentage of the recommended amount of mineral fertilizer (RDF). RDF was selected based on Indonesia Food Crop Agriculture Service. Decanter cake from palm oil mill waste was used as a source of organic material. Experimental parameters are plant height, leaf number, grain yield, 100 grain weight, and the number of pods, seeds per pod, and plant. The result indicated the combination of mineral fertilizer and organic material DC had significant differences in increasing plant height and number of leaves. Different types of RDF and DC combinations showed substantial effects on the soybean yield and yield components. The combination of RDF 25% and decanter cake at any dose positively impacted soybean height, leaf number, and grain yield component. The highest dry seed yield of 2.48 tons per hectare was achieved by a combination of 25% RDF and 20 ton ha-1 decanter cake. Soybean yield in this study was higher than Anjasmoro’s description of 2.03–2.25 tons ha-1

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Section: Number Of Leavessupporting

confidence: 87%

Soybean Yield Optimization by Utilizating the Solid Waste of Oil Palm Factory

Duaja

Kartika

Gusniwati

et al. 2022

Agric

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“…In contrast, those fields where high yields were obtained showed no evidence of soil compaction and wheat roots extended to 1.5m depth. Soil compaction has been shown not only to restrict root development, but also to reduce root growth rates (Orellana, et al, 1990). Although it is not possible to precisely quantify the extent of compacted soils in the central zone of Santa Cruz, it would seem likely that at least 50 per cent of the soils suffer from serious compaction problems.…”

Section: Extent and Effects Ofsoil Compacrionmentioning

confidence: 99%

Soil degradation in the tropical lowlands of Santa Cruz, Eastern Bolivia

Barber¹

1995

Land Degrad Dev

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This paper examines the soil degradation processes that are threatening the productivity of the mechanized annual cropping areas in the Santa Cruz lowlands of tropical eastern Bolivia. The dominant process is that of machineryinduced and natural compaction, which has resulted in an estimated 50 per cent of the soils in the Central Zone being moderately to severely compacted, causing serious root restriction and the loss of both transmission and waterstorage pores. Degradation has made the soils increasingly susceptible to moisture stress due to the combined effect of (i) restricted rooting as a result of compaction and the hardsetting characteristics of the soils, (ii) reduced rainfall infiltration due to the loss of transmission pores and surface crusting, and (iii) a decrease in available soil moisture caused by the loss of storage pores, the incorporation of wind-blown fine sand deposits, and soil organic matter losses due to accelerated decomposition rates. The loss of transmission pores has also made the soils more prone to waterlogging in periods of high rainfall. The degradation tendencies of these soils are exacerbated by the greater variability of seasonal rainfall during the last 20 years that has led to a greater frequency of extremely high or extremely low rainfall events than hitherto.

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