Advances in Cassava‐Based Multiple‐Cropping Systems

Ravi, V.; Suja, G.; Saravanan, R.; More, Sanket J.

doi:10.1002/9781119750802.ch3

Cited by 4 publications

(1 citation statement)

References 142 publications

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“…Although the results are not accepted by a garden owner, taking into account the social role of the agroforestry system, yield palm trees managed by those work as palm sugar tappers are still recorded as the production system, by converting the average amount of palm sugar production in IDR from plots YCAF 1 and 4. Total production equivalent cocoa bean was calculated with formula TEY by Ravi et al (2021):…”

Section: Harvest Production Systemsmentioning

confidence: 99%

Tree density impact on growth, roots length density, and yield in agroforestry based cocoa

Saleh

GUSLI²,

Ala³

et al. 2022

Biodiversitas

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Abstract. Saleh AR, Gusli S, Ala A, Neswati R, Sudewi S. 2021. Tree density impact on growth, roots length density, and yield in agroforestry based cocoa. Biodiversitas 23: 496-506. Cocoa-based agroforestry systems using langsat trees as shade is aimed to maximize the absorptions of solar energy, water, and nutrients, and increase income sources for farmers. Limited information about interspecific interactions between cocoa and langsat which is needed to improve the performance of agroforestry systems is a challenging idea. We studied the relationship characteristics of cocoa trees as a present shaded effect in the agroforestry system. Compared agroforestry systems were based on ages, namely young and old cocoa agroforestry or YCAF and OCAF, and monoculture systems (Mono) regardless of plant age. On above stony soil, we observed root length density (RLD) of cocoa and langsat fine roots, from under cocoa canopy to three distance levels from the cocoa stem (i.e. at a distance 0.4 m, 1.2 m and, 1.7 m), and four distance depths for all systems (i.e. at a depth 0-10 cm, 10-20 cm, 20-30 cm and, 30-40 cm). Stem diameter, basal area, canopy cover, yield cocoa beans, and convertible products non-cocoa were equivalent to the price of cocoa beans by tree equivalent yield (TEY) formula. Cocoa RLD in the Mono system did not differ from RLD-cocoa in the OCAF system, but both significantly differed with RLD-cocoa in the YCAF system. Shade trees increased tree density in both agroforestry systems, triggering competition in the canopy for sunlight. Expansion of langsat roots that spread closer to the cocoa trunk increased competition for nutrients and water. Both cocoa and langsat roots overlapped, exploring the same area. The yield of cocoa beans harvested by farmers from the YCAF and OCAF systems decreased by 50%. However, the langsat tree and several other species were accounted for 50% of the TEY in the agroforestry system, thereby adding a source of income to farmers is equivalent to the yield of cocoa beans from a monoculture system.

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Section: Harvest Production Systemsmentioning

confidence: 99%

Tree density impact on growth, roots length density, and yield in agroforestry based cocoa

Saleh

GUSLI²,

Ala³

et al. 2022

Biodiversitas

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Morphophysiological Responses and Tolerance Mechanisms in Cassava (Manihot esculenta Crantz) Under Drought Stress

Bardhan

Ravi

et al. 2023

J Soil Sci Plant Nutr

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Evaluation of potential increase in photosynthetic efficiency of cassava (Manihot esculenta Crantz) plants exposed to elevated carbon dioxide

Ravi,

Raju,

2024

Funct. Plant Biol.

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Cassava (Manihot esculenta Crantz), an important tropical crop, is affected by extreme climatic events, including rising CO2 levels. We evaluated the short-term effect of elevated CO2 concentration (ECO2) (600, 800 and 1000 ppm) on the photosynthetic efficiency of 14 cassava genotypes. ECO2 significantly altered gaseous exchange parameters (net photosynthetic rate (Pn), stomatal conductance (gs), intercellular CO2 (Ci) and transpiration (E)) in cassava leaves. There were significant but varying interactive effects between ECO2 and varieties on these physiological characteristics. ECO2 at 600 and 800 ppm increased the Pn rate in the range of 13–24% in comparison to 400 ppm (ambient CO2), followed by acclimation at the highest concentration of 1000 ppm. A similar trend was observed in gs and E. Conversely, Ci increased significantly and linearly across increasing CO2 concentration. Along with Ci, a steady increase in water use efficiency [WUEintrinsic (Pn/gs) and WUEinstantaneous (Pn/E)] across various CO2 concentrations corresponded with the central role of restricted stomatal activity, a common response under ECO2. Furthermore, Pn had a significant quadratic relationship with the ECO2 (R2 = 0.489) and a significant and linear relationship with Ci (R2 = 0.227). Relative humidity and vapour pressure deficit during the time of measurements remained at 70–85% and ~0.9–1.31 kPa, respectively, at 26 ± 2°C leaf temperature. Notably, not a single variety exhibited constant performance for any of the parameters across CO2 concentrations. Our results indicate that the potential photosynthesis can be increased up to 800 ppm cassava varieties with high sink capacity can be cultivated under protected cultivation to attain higher productivity.

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Advances in Cassava‐Based Multiple‐Cropping Systems

Cited by 4 publications

References 142 publications

Tree density impact on growth, roots length density, and yield in agroforestry based cocoa

Tree density impact on growth, roots length density, and yield in agroforestry based cocoa

Morphophysiological Responses and Tolerance Mechanisms in Cassava (Manihot esculenta Crantz) Under Drought Stress

Evaluation of potential increase in photosynthetic efficiency of cassava (Manihot esculenta Crantz) plants exposed to elevated carbon dioxide

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