Review on effect of population density and tuber size on yield components and yield of potato (Solanum tuberosum L.)

Nasir, Semira; Akassa, Bikila

doi:10.5897/ajps2018.1701

Cited by 6 publications

(2 citation statements)

References 7 publications

(7 reference statements)

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“…In terms of intercropping pattern, spacing and size of potato tubers are important factors. According to [9], a spacing of 60 x 30 cm with medium and large tuber sizes resulted in a higher marketable tuber production of 9.53% compared to a plant spacing of 75 x 30 cm. Furthermore, spacing of 50 and 60 cm inter-row and 25 cm intra-row resulted in 41% production compared to spacing of 75 x 30 cm [10].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Dry Land Through Intercropping of Coffee and Potatoes to Support Farmers’ Income

Parhusip

Girsang

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Coffee and potato intercropping is one of the ways to use land and increase farmers’ income. The objective is to increase land production and income of farmers on upland intercropping. The study was conducted at Gurgur Experimental station, Toba Samosir Regency from July to November 2019. The study used a randomized completed block design where the first factor was tuber size, where U1 = large tuber (size 91-120 g) and U2 = small tuber (size 61-90 g), and the second factor was fertilization, where P1 = control; P2 = control + Beauveria; P3 = control + solvent P; P4 = NPK; P5 = NPK + Beauveria; P6 = NPK + solvent P; P7 = NPK + Beauveria + solvent P with 4 replications. The recommendation for potatoes is a complete fertilizer application with the addition of Beauveria and P solvent, plant spacing of 80 x 30 cm, and manure to increase P availability. For coffee plants in the form of pruning, fertilization according to plant age, and application of dolomite and soil organic matter; profit increased by IDR. 102,459,124-, from coffee only IDR. 28,760,000, - to be IDR. 131,219,124, - on the intercropping of Coffee and Potatoes.

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Section: Introductionmentioning

confidence: 99%

Optimization of Dry Land Through Intercropping of Coffee and Potatoes to Support Farmers’ Income

Parhusip

Girsang

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Plant density, or stand (Semira and Bikila, 2018 ), is among the main factors affecting plant development and function. It is defined as the number of plants cultivated per unit area, but could also be described by the distance, i.e., spacing between plants.…”

Section: Introductionmentioning

confidence: 99%

Too Dense or Not Too Dense: Higher Planting Density Reduces Cannabinoid Uniformity but Increases Yield/Area in Drug-Type Medical Cannabis

Danziger

Bernstein²

2022

Front. Plant Sci.

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A major challenge for utilizing cannabis for modern medicine is the spatial variability of cannabinoids in the plant, which entail differences in medical potency. Since secondary metabolism is affected by environmental conditions, a key trigger for the variability in secondary metabolites throughout the plant is variation in local micro-climates. We have, therefore, hypothesized that plant density, which is well-known to alter micro-climate in the canopy, affects spatial standardization, and concentrations of cannabinoids in cannabis plants. Canopy density is affected by shoot architecture and by plant spacing, and we have therefore evaluated the interplay between plant architecture and plant density on the standardization of the cannabinoid profile in the plant. Four plant architecture modulation treatments were employed on a drug-type medicinal cannabis cultivar, under a density of 1 or 2 plants/m2. The plants were cultivated in a naturally lit greenhouse with photoperiodic light supplementation. Analysis of cannabinoid concentrations at five locations throughout the plant was used to evaluate treatment effects on chemical uniformity. The results revealed an effect of plant density on cannabinoid standardization, as well as an interaction between plant density and plant architecture on the standardization of cannabinoids, thus supporting the hypothesis. Increasing planting density from 1 to 2 plants/m2 reduced inflorescence yield/plant, but increased yield quantity per area by 28–44% in most plant architecture treatments. The chemical response to plant density and architecture modulation was cannabinoid-specific. Concentrations of cannabinoids in axillary inflorescences from the bottom of the plants were up to 90% lower than in the apical inflorescence at the top of the plant, considerably reducing plant uniformity. Concentrations of all detected cannabinoids in these inflorescences were lower at the higher density plants; however, cannabinoid yield per cultivation area was not affected by neither architecture nor density treatments. Cannabigerolic acid (CBGA) was the cannabinoid least affected by spatial location in the plant. The morpho-physiological response of the plants to high density involved enhanced leaf drying at the bottom of the plants, increased plant elongation, and reduced cannabinoid concentrations, suggesting an involvement of chronic light deprivation at the bottom of the plants. Therefore, most importantly, under high density growth, architectural modulating treatments that facilitate increased light penetration to the bottom of the plant such as “Defoliation”, or that eliminated inflorescences development at the bottom of the plant such as removal of branches from the lower parts of the plant, increased chemical standardization. This study revealed the importance of plant density and architecture for chemical quality and standardization in drug-type medical cannabis.

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Effect of Intra Row Spacing and Nitrogen Fertilizer Levels on Yield of Shallot in Mulo District, Ethiopia

Hailu,

Chewaka,

Jalata

2024

AFF

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The shallot is one of the important alliaceous crops cultivated in many tropical countries. It is an important horticultural crop used to flavor the local stew "wot" and a source of income for farmers in Ethiopia. However, the productivity of shallot is low at study area due to various limiting factors such as low soil fertility, plant population and lack of improved agronomic practices. A field experiment was conducted to investigate the effect of intra-row spacing and nitrogen fertilizer levels on growth, yield and quality of shallot at Mulo District, Oromia Regional state, Ethiopia during 2021/22 off season. The treatments consisted of four intra-row spacing (5, 10, 15 and 20) cm and four levels of nitrogen fertilizer (0, 50, 100 and 150) kgNha-1 tested in a randomized complete block design with three replications. Data on shallot yield was collected. The interaction effect of intra-row spacing and nitrogen fertilizer influenced the marketable yield, unmarketable yield, bulb weight, bulb fresh weight, bulb dry weight, dry matter and total yield. As a result, the treatment combination of 150kgha-1 nitrogen and 15cm intra-row spacing yielded the highest net benefit of shallot (Eth-Birr 1,012,274), followed by the treatment combination of 150kgha-1 nitrogen and 20 cm intra-row spacing. In conclusion, the above findings indicated that the combined application of 150kgNha-1 with 15 cm spacing can improve shallot growth and productivity in the Mulo district area. However, more research needs to be done in different seasons and locations, taking into account the application rate of nitrogen fertilizer and different intra-row spacing, to generate more reliable information.

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Review on effect of population density and tuber size on yield components and yield of potato (Solanum tuberosum L.)

Cited by 6 publications

References 7 publications

Optimization of Dry Land Through Intercropping of Coffee and Potatoes to Support Farmers’ Income

Optimization of Dry Land Through Intercropping of Coffee and Potatoes to Support Farmers’ Income

Too Dense or Not Too Dense: Higher Planting Density Reduces Cannabinoid Uniformity but Increases Yield/Area in Drug-Type Medical Cannabis

Effect of Intra Row Spacing and Nitrogen Fertilizer Levels on Yield of Shallot in Mulo District, Ethiopia

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