Zobrazeno 1 - 10
of 191
pro vyhledávání: '"J. K. Syers"'
Publikováno v:
Methods for Assessing Soil Quality
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::07988c3cf6423fdc4fc9cf814ce622a9
https://doi.org/10.2136/sssaspecpub49.c26
https://doi.org/10.2136/sssaspecpub49.c26
Publikováno v:
Nutrient Cycling in Agroecosystems. 66:119-131
Livestock excreta make an important contribution to soil nutrient inputs and in many developing countries are the only significant input. However, there is little quantitative information available on excreta, manure production, and application and t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2515afa841df22ee74bf83a52ec7eea
https://doi.org/10.1023/a:1023944131188
https://doi.org/10.1023/a:1023944131188
Publikováno v:
Nutrient Cycling in Agroecosystems. 62:61-72
Mining of nutrients from the soil, particularly in developing countries, is a major problem, causing soil degradation and threatening long-term food production. This paper develops a methodology for carrying out nutrient audits, which includes the ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f68ff10e510b4f01fdf4323b789d7011
https://doi.org/10.1023/a:1015124930280
https://doi.org/10.1023/a:1015124930280
Publikováno v:
Biology and Fertility of Soils. 34:258-263
Soil phosphatase activities play an important role in the mineralisation of soil phosphorus (P). In this study acid and alkaline phosphomonoesterase and phosphodiesterase activities of soils under long-term fertiliser management (ca. 100 years) were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27e23570c413ef3e225d6963fd30a357
https://doi.org/10.1007/s003740100411
https://doi.org/10.1007/s003740100411
Autor:
J. K. Syers, Denis Curtin
Publikováno v:
Scopus-Elsevier
Increases in soil P availability due to liming have been reported in a number of glasshouse and field trials, but the mechanism responsible for this effect has not been identified definitely. In a laboratory study, we examined the effects of lime on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7fb7471043a08dfbc93fc405a6ed6bcf
https://doi.org/10.2136/sssaj2001.651147x
https://doi.org/10.2136/sssaj2001.651147x
Publikováno v:
Biology and Fertility of Soils. 32:500-507
This study aimed to validate the fumigation-extraction method for measuring microbial biomass P in acid soils. Extractions with the Olsen (0.5 M NaHCO3, pH 8.5) and Bray-1 (0.03 M NH4F–0.025 M HCl) extractants at two soil:solution ratios (1 : 20 an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27a3059f0edb175b1f0a8ce1e84589ed
https://doi.org/10.1007/s003740000284
https://doi.org/10.1007/s003740000284
Publikováno v:
Scopus-Elsevier
Summary The effects of a 3-year ley-arable rotation (2 years under grass, legume or a grass-legume mixture, followed by 1 year under cassava) on the organic C content of upland sandy soils in Northeast Thailand were evaluated using four field trials
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49dfbbf463b1e6bbf29cfbb87e0f60d1
https://doi.org/10.1046/j.1365-2389.1998.4930463.x
https://doi.org/10.1046/j.1365-2389.1998.4930463.x
Publikováno v:
Biology and Fertility of Soils. 24:421-428
The response of the soil microbial biomass to seasonal changes was investigated in the field under pastures. These studies showed that over a 9-month period, microbial biomass carbon, phosphorus and sulphur (biomass C, P, S), and their ratios (C:P, C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7af711932521e99aaf35e4929b89385
https://doi.org/10.1007/s003740050267
https://doi.org/10.1007/s003740050267
Publikováno v:
Communications in Soil Science and Plant Analysis. 27:2265-2278
The effect of pH on the saturated hydraulic conductivity (K) of repacked columns of two non‐sodic soils (Healaugh and Fagaga soils) was examined. The K value was greater for the Fagaga soil than for the Healaugh soil which is attributed to the diff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2517c84ddab72c05f3b3d5e25af6ba44
https://doi.org/10.1080/00103629609369702
https://doi.org/10.1080/00103629609369702
Publikováno v:
Canadian Journal of Soil Science. 75:423-428
Within the context of major land uses such as agriculture, the indicators of sustainability must be framed within the social and economic conditions of the society in question. Whereas an indicator is used to measure changes in key attributes, usuall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6efb7c54e463db1ff2cbf1edb428184b
https://doi.org/10.4141/cjss95-062
https://doi.org/10.4141/cjss95-062