Rice hull ash as a source of silicon and phosphatic fertilizers: effect on growth and yield of rice in coastal Karnataka, India

2009 ◽  
Vol 32 (1) ◽  
Author(s):  
NB Prakash ◽  
H Nagaraj ◽  
KT Guruswamy ◽  
BN Vishwanatha ◽  
C Narayanaswamy ◽  
...  
2020 ◽  
Vol 16 (1) ◽  
pp. 1-10
Author(s):  
Francis Junior Soldateli ◽  
Carine Borges Batista ◽  
Filipe Godoy ◽  
Anderson Chuquel Mello ◽  
Franciéle dos Santos Soares ◽  
...  

The objective of this study was to evaluate the influence of substrates on the growth and yield of Cascade and Samambaia cherry tomato cultivars under protected environment. A completely randomized experimental design with six treatments and four replications was adopted. The treatments consisted of six substrates resulting from the combination of soil (CS), bovinemanure (BM), rice husk (RH) and rice hull ash (RA), in the proportions: S1 -70% SC + 10% BM + 10% RH + 10% RA; S2 -60% SC + 20% BM + 10% RH + 10% RA; S3 -50% SC + 30% BM + 10% RH + 10% RA;S4 -60% SC + 30% BM + 10% RH; S5 -70% SC + 20% BM + 10% RH; and S6 -100% SC. Plant growth, yield and development parameters were evaluated. Cherry tomato growth and yield changed according to the substrate characteristics. The substrate composed by soil was not efficient, presenting the lowest values for all the vegetative and reproductive parameters studied. The substrates made from alternative ecologically based residues are interesting and alternative sources for tomato cultivation aiming at the reuse of the matter and the sustainability of the production system.


2017 ◽  
pp. 44-54
Author(s):  
Zenaida Gonzaga ◽  
Warren Obeda ◽  
Ana Linda Gorme ◽  
Jessie Rom ◽  
Oscar Abrantes ◽  
...  

Okra or Lady’s finger, botanically known as Abelmoschus esculentus (L.) Moench, is a tropical and sub-tropical indigenous vegetable crop commonly grown for its fibrous, slimy, and nutritious fruits and consumed by all classes of population. It has also several medicinal and economic values. Despite its many uses and potential value, its importance is under estimated, under-utilized, and considered a minor crop and little attention was paid to its improvement. The study was conducted to evaluate the effects of different planting densities and mulching materials on the growth and yield of okra grown in slightly sloping area in the marginal uplands in Sta. Rita, Samar, Philippines. A split-plot experiment was set up with planting density as main plot and the different mulching materials as the sub-plot which were: unmulched or bare soil, rice straw, rice hull, hagonoy and plastic mulch. Planting density did not significantly affect the growth and yield of okra. Regardless ofthe mulching materials used, mulched plants were taller and yielded higher compared to unmulched plants. Moreover, the use of plastic mulch resulted to the highest total fruit yield. The results indicate the potential of mulching in increasing yield and thus profitability of okra production under marginal upland conditions.


Waterlines ◽  
1983 ◽  
Vol 2 (2) ◽  
pp. 21-23 ◽  
Author(s):  
Barnes ◽  
Mampitiyarachichi

2016 ◽  
Vol 8 (6) ◽  
pp. 2131-2140 ◽  
Author(s):  
Ailar Hajimohammadi ◽  
Jannie S. J. van Deventer

2016 ◽  
Vol 11 (50) ◽  
pp. 5080-5091 ◽  
Author(s):  
Neto Almeida Santos Otavio ◽  
Vinícius Folegatti Marcos ◽  
Patias Lena Bruno ◽  
Vieira Jose Jefferson ◽  
Duarte Fanaya Júnior Eder ◽  
...  

2016 ◽  
Vol 864 ◽  
pp. 112-116
Author(s):  
Rinlee Butch M. Cervera ◽  
Emie A. Salamangkit-Mirasol

Rice hull or rice husk (RH) is an agricultural waste obtained from milling rice grains. Since RH has no commercial value and is difficult to use in agriculture, its volume is often reduced through open field burning which is an environmental hazard. In this study, amorphous nanosilica from Philippine waste RH was prepared via acid precipitation method. The synthesized samples were fully characterized for its microstructural properties. X-ray diffraction pattern reveals that the structure of the prepared sample is amorphous in nature while Fourier transform infrared spectrum showed the different vibration bands of the synthesized sample. Scanning electron microscopy (SEM) and particle size analysis (PSA) confirmed the presence of agglomerated silica particles. On the other hand, transmission electron microscopy (TEM) revealed an amorphous sample with grain sizes of about 5 to 20 nanometer range and has about 95 % purity according to EDS analyses. The elemental mapping also suggests that leaching of rice hull ash effectively removed the metallic impurity such as potassium element in the material. Hence, amorphous nanosilica was successfully prepared via a low-cost acid precipitation method from Philippine waste rice hull.


2020 ◽  
Vol 8 (1) ◽  
pp. 1-7
Author(s):  
Mahdi S. Mizel ◽  
Ragheb H. A. Albourky ◽  
Hayder A. Almaghir

"A field experiment was carried in two locations (Nasr and Eslah) in Thi Qar province during winter season (2015 – 2016). the experience included study two factors which of three concentrations of iron chelated (0-50-100 mg L-1 ) spray on leaves before flowering period , and three levels of potassium fertilizer ( 0- 50-100 K2O kg h-1 ) The experiment was designed by using randomized complete blocks design with three replication (RCBD) with three replications. Results showed that the iron chelated treatments had a significant effect on growth traits in both of Nasr and Eslah locations , the treatment of concentration of 100 mg/ L get higher values for growth traits plant height 88-85 cm and the number of tillers / plant 12-10 Tillers, area flag leaf 25.6-25.5 cm2 and yield grain 6.04-5.97 t / h in Nasr and Eslah, respectively, while potassium treatment had a significant effect on growth traits in both of locations, the treatment 100 kg K2O h -1 gave higher values for growth traits area flag leaf reached 28-27.1 cm2 and gave the highest values of the attributes of yield the components and yield grain 6.00-5.9 t / h in Nasr site and Eslah, respectively . The combination treatment (100 mg Fe with 100 kg K2O) gave the highest mean properties of the yield components, number of spikes, number of grains per spike, and grain yield compared to the control treatment"


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