Zobrazeno 1 - 10
of 45
pro vyhledávání: '"N. G. Juma"'
Most Cryoboralfs in Canada occur in the northern interior plains of Manitoba, Saskatchewan, and Alberta. The Breton Plots were established in 1930 to find “a system of farming suitable for the wooded soil belt.” The soil amendments included sever
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99b2da14dd922bcc1297fd024deb03b8
https://doi.org/10.1201/9780367811693-20
https://doi.org/10.1201/9780367811693-20
Publikováno v:
Soil Processes and the Carbon Cycle ISBN: 9780203739273
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55c8f3cf82dffbf6e6af3017983a3a35
https://doi.org/10.1201/9780203739273-16
https://doi.org/10.1201/9780203739273-16
Publikováno v:
Functional Ecology. 24:283-292
Summary 1. Large herbivores are known to spatially concentrate and alter the form of nitrogen (N) in grassland systems, which can modify aboveground plant chemical composition and productivity, and result in shifts in grazing pressure in these areas.
Autor:
N. G. Juma, H. Henry Janzen, Harold P. Collins, C. A. Campbell, Robert P. Zentner, G. P. Lafond, Keith Paustian, Serita D. Frey, Eldor A. Paul, E.T. Elliott, Alan P. Moulin
Publikováno v:
Canadian Journal of Soil Science. 84:49-61
Factors controlling soil organic matter (SOM) dynamics in soil C sequestration and N fertility were determined from multi-site analysis of long-term, crop rotation experiments in Western Canada. Analyses included bulk density, organic and inorganic C
Publikováno v:
Soil Science Society of America Journal. 65:205-214
Soil C contents can be raised by land use practices in which rates of C input exceed those of C oxidation. Rates of C inputs to soil can be raised by continuous cropping, especially with perennial legumes, and by soil amendments, especially manure. W
Publikováno v:
Canadian Journal of Soil Science. 80:277-282
Soil samples from differing cropping systems were amended with 15N-labeled plant residues having varying carbon to nitrogen (C:N) ratios to quantify N dynamics in a Gray Luvisolic soil. For non-amended cropping systems a significantly greater amount
Autor:
N. G. Juma, Robert P. Zentner, William B. McGill, Roberto C. Izaurralde, B.H. Ellert, C. A. Campbell, H. Henry Janzen
Publikováno v:
Soil and Tillage Research. 47:181-195
The Canadian prairie, which accounts for about 80% of Canada's farmland, has large reserves of soil organic carbon (SOC). Changes in the size of the SOC pool have implications for soil productivity and for atmospheric concentrations of CO 2 , an impo
Publikováno v:
Canadian Journal of Soil Science. 76:117-123
Proper management of crops on Gray Luvisols requires knowledge of net soil N mineralization during the growing season. Soil samples from a long-term field experiment at Beaverlodge, Alberta, were used to determine the kinetics of net N mineralization
Autor:
X. C. Chang, N. G. Juma
Publikováno v:
Biology and Fertility of Soils. 22:31-39
We studied the impact of continous barley and a 4-year rotation consisting of fababean, barley after fababean, barley intercropped with field pea, and barley after the intercrop on the soil biological properties of a Gray Luvisol. The crop rotations
Autor:
N. G. Juma, Y. Feng, Roberto C. Izaurralde, Barry M. Olson, J. A. Robertson, William B. McGill
Publikováno v:
Canadian Journal of Soil Science. 75:497-505
The extent of nitrate leaching in cultivated soils of Alberta is unknown. We studied how long- and short-term agricultural practices influenced nitrate leaching in a cryoboreal subhumid soil-climate of north-central Alberta. The study used plots from