A Study on the Influence of Some Transplant Growing Media on Flowering and Yield of Tomato

Sawan, Omaima N.; El-Beltagy, M.S.; Mohamedien, S.A.; El-Beltagy, A.S.; Maksoud, M. Abdel

doi:10.17660/actahortic.1986.190.59

Cited by 2 publications

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“…One of the oldest sources of organic matter for increasing crop productivity is the recycling of agricultural waste such as straws, stalks, husks, etc. For example, rice husk was used as a partial substitute of the expensive traditional medium components for producing high quality greenhouse and nursery crops (El-Torky and Bedaiwy 1998) as well as many other crops (Cerff et al 1985, Sawan et al 1986).…”

Section: Introductionmentioning

confidence: 99%

Coffee Grounds as a Soil Conditioner: Effects on Physical and Mechanical Properties - I. Effects on Physical Properties

Bedaiwy

Maksoud

Saad

2018

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1Abstract. Coffee grounds (CG) improved some soil physical properties (dry density, γ d ; porosity, n; aggregation; hydraulic conductivity, K s ; and infiltration rate, IR). Effects on other properties were inconsistent (e.g., sorptivity, S), or unfavorable (e.g., available water, AW). γ d decreased and n increased with CG. CG decreased K s in sand. In calcareous soil, maximum increase was associated with 10% and 15% CG before and after wetting-and-drying cycles (WDC), respectively. K s increased with CG in clay, with greatest increase attained at 10% CG. IR decreased with CG in sand. In calcareous and clayey soils, IR decreased with CG before WDC but increased after WDC where maximum increase in clay was linked to 10% CG. No solid trends of soil sorptivity (S) were identified. Before WDC, S had the order: sand > calcareous > clay. For most cases, adding CG increased total water holding capacity (WHC). However, after WDC, the increase in water content at field capacity (FC) with CG was accompanied by a greater increase in wilting point (WP) and therefore a decrease in AW. CG improved soil structure and aggregation and increased non-water-stable aggregates in calcareous and clayey soils. Mean weight diameter (MWD) indicated an increase in water-stable aggregates in sand at 5% and 10% CG. In clay, MWD increased only at 5% CG. Although results did not show coherent responses with some tested properties, they, mostly, indicate some beneficial effects of CG, particularly in relation to improving aggregation and water flow.

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Section: Introductionmentioning

confidence: 99%

Coffee Grounds as a Soil Conditioner: Effects on Physical and Mechanical Properties - I. Effects on Physical Properties

Bedaiwy

Maksoud

Saad

2018

pjss

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“…El-Torky and Bedaiwy (1998) used rice husk as a partial substitute of the expensive traditional medium components for producing high quality greenhouse and nursery crops. The same approach was used with other crops (Sharma et al 1988, El-Torky and El-Shennawy 1995, Cerff et al 1985, Sawan et al 1986). Physical and mechanical characteristics of the soil are drastically affected by OM content (Henderson and Perry 1955, Tisdall and Oades 1982, Rolston et al 1988, Sumner 2000.…”

Section: Introductionmentioning

confidence: 99%

Coffee grounds as a soil conditioner: Effects on physical and mechanical properties – II. Effects on mechanical properties

Bedaiwy¹,

Maksoud²,

Saad³

2019

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<p>Applying coffee grounds (CG) to sandy, calcareous, and clayey soils resulted in notable effects on soil expansion, cracking, cohesion, internal friction, initial stress and resistance to penetration. In sand, expansion upon saturation was greater after wetting-and-drying cycles. Highest increases were 15.71%, 16.14% and 31.86% for sandy, calcareous and clayey soils, respectively. Effect of CG on cracking was negligible in sand and very slight (<1.0%) in the calcareous soil but marked in clay (14.18% at 10% CG). In sand, cohesion (c) increased significantly with CG up to the 10% content. Cohesion increased by 2.5-folds and 4.5-folds at 5% and 10% CG, respectively. The presence of fine CG grains among larger sand particles, boosted microbial activities, and the resulting cementing and binding effects resulted in increased cohesion. For calcareous soil, cohesion rose from 0.04 kg∙cm-2 to 0.13 kg∙cm-2 as CG increased from 0% to 15%. In clay, maximum cohesion (0.20 kg∙cm-2) was associated with the 10% CG and was highest of all soils. In sand, the angle of internal friction (φ) decreased notably as CG increased from 5% to 10% but there was no consistent pattern in any of the soils. An increase in initial stress (pi) was observed between 0% and 10% CG in sand and between 0% and 15% in calcareous soil while clay showed no particular trend. Patterns of pi were, thus, consistent with those of cohesion for all soils. Resistance to penetration increased substantially with CG in sand. The effect in calcareous and clayey soils took an opposite trend to that of sand and resistance was generally higher in calcareous soil. Overall effects of CG on resistance were desirable in all soils as far as agriculture (seedling emergence, crop growth, irrigation, etc.) is concerned.</p>

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A Study on the Influence of Some Transplant Growing Media on Flowering and Yield of Tomato

Cited by 2 publications

References 0 publications

Coffee Grounds as a Soil Conditioner: Effects on Physical and Mechanical Properties - I. Effects on Physical Properties

Coffee Grounds as a Soil Conditioner: Effects on Physical and Mechanical Properties - I. Effects on Physical Properties

Coffee grounds as a soil conditioner: Effects on physical and mechanical properties – II. Effects on mechanical properties

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