scholarly journals Effect of Reversal of Conservation Tillage on Soil Nutrient Availability and Crop Nutrient Uptake in Soybean in the Vertisols of Central India

2020 ◽  
Vol 12 (16) ◽  
pp. 6608
Author(s):  
Dharmendra Singh ◽  
Sangeeta Lenka ◽  
Narendra Kumar Lenka ◽  
Sudhir Kumar Trivedi ◽  
Sudeshna Bhattacharjya ◽  
...  
Keyword(s):  
Nutrient Uptake ◽  
Nutrient Availability ◽  
Interaction Effect ◽  
Nutrient Management ◽  
Conservation Tillage ◽  
Soil Nutrient ◽  
Central India ◽  
Conventional Tillage ◽  
Available P ◽  
Soil Nutrient Availability

Effect of conservation tillage on crop performance and soil properties has been studied extensively under different agro-climatic situations. However, the impact of reversal from conservation tillage to conventional tillage on crop growth and soil nutrient release is rarely addressed. Thus, this study was conducted by converting half of the eight years old conservation tillage experiment to the conventional one with a similar level of residue return to compare the effect on soil nutrient availability and nutrient uptake in soybean crops in the Vertisols of Central India. The conservation tillage treatments included no-tillage (NT) and reduced tillage (RT) with 100% NPK (T1), 100% NPK + farmyard manure (FYM) at 1.0 Mg-carbon (C)/ha (T2), and 100% NPK + FYM at 2.0 Mg-C/ha (T3). After eight years of the experiment, the RT and NT treatments were subjected to conventional tillage, and thus the tillage treatments were RT-CT, RT, NT, and NT-CT. After tillage reversal for three growing seasons, soybean yield and nutrient uptake (N, P, K) got significantly influenced by the tillage and nutrient management. Averaged across nutrient treatments, NT showed highest soil organic carbon (SOC) content (8.4 g/kg) in the surface 0–5 cm layer. However, at 5–15 cm depth, the SOC was greater in the RT-CT treatment by 14% over RT and by 5% in the NT-CT treatment over NT. The soil nutrient availability (N and P) was not significantly (p > 0.05) affected by the interaction effect of tillage and nutrient on the surface soil layer (0–5 cm). Interaction effect of tillage and nutrient was significant on available P content at 5–15 cm soil depth. In contrast to N, soil available P relatively increased with reversal of tillage in both NT and RT. Tillage reversal (NT-CT, RT-CT) and RT had significantly higher available potassium than NT in 0–5 and 5–15 cm soil layers. Among the treatments, NT-CT-T3 showed significantly higher seed N (85.49 kg/ha), P (10.05 kg/ha), and K (24.51 kg/ha) uptake in soybean. The study indicates conventional tillage with residue returns and integrated nutrient management could be a feasible alternative to overcome the limitations of no-till farming in the deep black Vertisols of Central India.

Classification and fertility status of organically managed fields across Saskatchewan, Canada

2010 ◽  
Vol 90 (4) ◽  
pp. 667-678 ◽  
Author(s):  
J.D. Knight ◽  
R. Buhler ◽  
J.Y. Leeson ◽  
S. Shirtliffe
Keyword(s):  
Nutrient Availability ◽  
Management Practices ◽  
Soil Nutrient ◽  
Organic Production ◽  
Available P ◽  
Soil Nutrient Availability ◽  
Available N ◽  
Organic Systems ◽  
The Individual ◽  
Organically Managed

Records from 60 organically managed fields across Saskatchewan were obtained from 39 farmers. The records contained details of 6 yr of management practices applied to each field and details about the general farm operation under which the individual fields were managed. In addition, soil samples were collected from each field and analysed for available N, P, K and S, pH, electrical conductivity (EC) and soil organic carbon. Soil nutrient availability is reported by soil zone. Using information from the management questionnaire, the 60 fields were classified into four distinct management systems, Perennial, Summerfallow, Cereal, and Diverse, and soil nutrient availability examined according to management system. Despite classification of four systems, only the Perennial and Diverse systems had a functionally (and statistically) significant effect on selected soil properties. Inclusion of alfalfa in rotation (Perennial system) acidified the soil and reduced availability of P and K relative to the Diverse system. According to soil test results, fields in all of the systems and across all soil zones were apparently deficient in available P, deficient to marginally deficient in available N and marginally deficient in available S. Available K levels were generally optimal. Information from this study provides a baseline for fertility of soils under organic production across Saskatchewan. The overall low levels of available P, N and S identified in this study raise questions about the long-term sustainability of these organic systems, as well as the suitability of traditional soil testing for accurately assessing the soil fertility potential of organic managed soils.

scholarly journals Herbivorous insect decreases plant nutrient uptake: the role of soil nutrient availability and association of below-ground symbionts

2014 ◽  
Vol 39 (4) ◽  
pp. 511-518 ◽  
Author(s):  
NOBORU KATAYAMA ◽  
ALESSANDRO O. SILVA ◽  
OSAMU KISHIDA ◽  
MASAYUKI USHIO ◽  
SATOSHI KITA ◽  
...  
Keyword(s):  
Nutrient Uptake ◽  
Nutrient Availability ◽  
Soil Nutrient ◽  
Herbivorous Insect ◽  
Plant Nutrient ◽  
Soil Nutrient Availability ◽  
Plant Nutrient Uptake ◽  
Below Ground

scholarly journals One Year Residual Effect of Sewage Sludge Biochar as a Soil Amendment for Maize in a Brazilian Oxisol

2021 ◽  
Vol 13 (4) ◽  
pp. 2226
Author(s):  
Joisman Fachini ◽  
Thais Rodrigues Coser ◽  
Alyson Silva de Araujo ◽  
Ailton Teixeira do Vale ◽  
Keiji Jindo ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Grain Yield ◽  
Nutrient Availability ◽  
Pyrolysis Temperature ◽  
Residual Effect ◽  
Soil Nutrient ◽  
Mineral Fertilizer ◽  
Corn Yield ◽  
Soil Nutrient Availability ◽  
One Year

The thermochemical transformation of sewage sludge (SS) to biochar (SSB) allows exploring the advantages of SS and reduces possible environmental risks associated with its use. Recent studies have shown that SSB is nutrient-rich and may replace mineral fertilizers. However, there are still some questions to be answered about the residual effect of SSB on soil nutrient availability. In addition, most of the previous studies were conducted in pots or soil incubations. Therefore, the residual effect of SSB on soil properties in field conditions remains unclear. This study shows the results of nutrient availability and uptake as well as maize yield the third cropping of a three-year consecutive corn cropping system. The following treatments were compared: (1) control: without mineral fertilizer and biochar; (2) NPK: with mineral fertilizer; (3) SSB300: with biochar produced at 300 °C; (4) SSB300+NPK; (5) SSB500: with biochar produced at 500 °C; and (6) SSB500+NPK. The results show that SSB has one-year residual effects on soil nutrient availability and nutrient uptake by maize, especially phosphorus. Available soil P contents in plots that received SSB were around five times higher than the control and the NPK treatments. Pyrolysis temperature influenced the SSB residual effect on corn yield. One year after suspending the SSB application, SSB300 increased corn yield at the same level as the application of NPK. SSB300 stood out and promoted higher grain yield in the residual period (8524 kg ha−1) than SSB500 (6886 kg ha−1). Regardless of pyrolysis temperature, biochar boosted the mineral fertilizer effect resulting in higher grain yield than the exclusive application of NPK. Additional long-term studies should be focused on SSB as a slow-release phosphate fertilizer.

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