Short-term effect of conservation agriculture practices on soil quality of a vertisol in central India

2017 ◽  
Vol 19 (1) ◽  
pp. 26
Author(s):  
Awanish Kumar ◽  
J. Somasundaram ◽  
A.K. Biswas ◽  
Nishant K. Sinha ◽  
V.N. Mishra ◽  
...  
2019 ◽  
pp. 96-101

Quantification of soil organic carbon cycling as impacted by soil and crop man- agement practices is required for C storage and soil quality improvement investi- gations. This study assessed the short-term effect of conventional tillage (CT) and No-Tillage (NT) practices on SOC sequestration and yield of cocoyam (Colocasia esculenta). The experiment was conducted simultaneously at two lo- cations (06◦52' N, 07◦15' E and 06◦ 26' N; 07◦16' E) in southeast Nigeria. A Ran- domized Complete Block Design with five replications and four treatments com- prised of CT and NT, respectively, with 150 and 300 Kg ha-1 of NPK 15:15:15, was used. Soil quality attributes were measured at two soil depths (0-20 cm and 20-40 cm) in both locations and analyzed. The results indicated that the quantity of carbon sequestered in the soil at 0-20 cm soil depth for both sites was 46.7- 90.9 and 65.0-117.9 Mg ha-1, respectively, for the two planting seasons in NT plots treated with 300 Kg ha-1 of NPK. This was followed by NT plots treated with 150 Kg ha-1 of NPK, which sequestered 55.5-86.2 and 46.7-91.9 Mg ha-1 SOC. CT plots that received 300 Kg ha-1 NPK with 11.3-47.6 Mg/ha SOC had 44% and 28% lower stored SOC when compared to NT, NPK 150 Kg ha-1 plots for the two-planting season respectively. This indicates that CT practices signifi- cantly limit SOC sequestration. CT with 300 Kg of NPK 15:15:15 gave the high- est corm yield, followed by No-till with 300 Kg ha-1. A better edaphic condition provided by CT was compensated for by higher doses of N fertilizer in NT Plots.


2013 ◽  
Vol 13 (8) ◽  
pp. 1335-1350 ◽  
Author(s):  
Rong-Jiang Yao ◽  
Jing-Song Yang ◽  
Tong-Juan Zhang ◽  
Peng Gao ◽  
Shi-Peng Yu ◽  
...  

2010 ◽  
Vol 6 (1) ◽  
pp. 22 ◽  
Author(s):  
MG Janaki ◽  
AmritR Kadam ◽  
S Mukesh ◽  
S Nirmala ◽  
Arul Arul ◽  
...  

2019 ◽  
Vol 33 (1) ◽  
Author(s):  
Simon M. Mueller ◽  
Alexander A. Navarini ◽  
Mohamad Goldust ◽  
Oliver Brandt ◽  
Christopher E. M. Griffiths ◽  
...  

Author(s):  
Florian Arendt

A test was done to see if reading a newspaper which consistently overrepresents foreigners as criminals strengthens the automatic association between foreign country and criminal in memory (i.e., implicit cultivation). Further, an investigation was done to find out if reading articles from the same newspaper produces a short-term effect on the same measure and if (1) emotionalization of the newspaper texts, (2) emotional reactions of the reader (indicated by arousal), and (3) attributed text credibility moderate the short-term treatment effect. Eighty-five participants were assigned to one of three experimental conditions. Participants in the control group received short factual crime texts, where the nationality of the offender was not mentioned. Participants in the factual treatment group received the same texts, but the foreign nationality was mentioned. Participants in the emotionalized treatment group received emotionalized articles (i.e., texts which are high in vividness and frequency) covering the same crimes, with the foreign nationality mentioned. Supporting empirical evidence for implicit cultivation and a short-term effect was found. However, only emotionalized articles produced a short-term effect on the strength of the automatic association, indicating that newspaper texts must have a minimum of stimulus intensity to overcome an effect threshold. There were no moderating effects of arousal or credibility pertaining to the impact on the implicit measure. However, credibility moderated the short-term effect on a first-order judgment (i.e., estimated frequency of foreigners of all criminals). This indicates that a newspaper’s effect on the strength of automatic associations is relatively independent from processes of propositional reasoning.


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