Zobrazeno 1 - 10
of 48
pro vyhledávání: '"H. H. Janzen"'
Autor:
H. H. Janzen, D. C. Reicosky
Publikováno v:
Soil and Climate ISBN: 9780429487262
This chapter describes Conservation Agriculture (CA) and associated carbon (C) management with its potential role in meeting food demands while minimizing environmental damage; and examines how improvements in carbon cycling and energy flow might adv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f0c7d27678d8d062e161c1f86fe7b8c
https://doi.org/10.1201/b21225-4
https://doi.org/10.1201/b21225-4
Publikováno v:
Journal of animal science. 94(8)
Ruminants raised for meat and milk are important sources of protein in human diets worldwide. Their unique digestive system allows them to derive energy and nourishment from forages, making use of vast areas of grazing lands not suitable for arable c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::63db96967dfbde0ca29aa03748cf9885
https://pubmed.ncbi.nlm.nih.gov/27695772
https://pubmed.ncbi.nlm.nih.gov/27695772
Autor:
H. H. Janzen
Publikováno v:
Canadian Journal of Soil Science. 89:247-254
Deep in the moldering archives of the Lethbridge Research Centre lie the near-forgotten treasures diaries and journals from the Centre’s early days, a century ago. Their fading scrawls reveal more than cold data and sterile facts; they show us peop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed27cc790375b5b100f4571ec7f031ff
https://doi.org/10.4141/cjss08055
https://doi.org/10.4141/cjss08055
Autor:
H H Janzen, B H Ellert
Publikováno v:
Canadian Journal of Soil Science. 88:207-217
Irrigated land in southern Alberta is intensively managed, producing high yields but also requiring higher inputs, notably of nitrogen (N), than adjacent rainfed lands. The higher N inputs, combined with enhanced soil moisture, might stimulate nitrou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::779a1401881b63fdbc927756397d4235
https://doi.org/10.4141/cjss06036
https://doi.org/10.4141/cjss06036
Autor:
H H Janzen
Publikováno v:
Canadian Journal of Soil Science. 81:489-503
Now, as a new century begins, may be a good time to reflect on the future of Soil Science on the Canadian prairies. One way to do that is to step back about one hundred years, to the turn of the previous century when our grassland soils were first cu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::657ad7368bec43b1d0c906e1d2fb8da4
https://doi.org/10.4141/s00-054
https://doi.org/10.4141/s00-054
Publikováno v:
Soil Science Society of America Journal. 62:677-682
Land-applied manure is a significant source of N20, but current estimates of emission are based on laboratory studies or field measurements from short-term application studies. Manure is often repeatedly applied to the same field for long periods, ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6aa4c4d4486579c6d8019981c857f2a9
https://doi.org/10.2136/sssaj1998.03615995006200030019x
https://doi.org/10.2136/sssaj1998.03615995006200030019x
Autor:
S. M. McGinn, H. H. Janzen
Publikováno v:
Canadian Journal of Soil Science. 78:139-148
There are several reasons why the measurement of ammonia emissions is important in agriculture. The emission of ammonia from stored and land-applied manure to the atmosphere can result in a significant loss of nitrogen for crop production. It is nece
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21448af0dc8e01d6a3b7b688108238ae
https://doi.org/10.4141/s96-059
https://doi.org/10.4141/s96-059
Publikováno v:
Soil Science Society of America Journal. 62:35-38
Agricultural soils are a major source of N 2 O that has been linked to an enhanced greenhouse effect and the depletion of stratospheric ozone. The N 2 O produced in the soil is usually assumed to enter the atmosphere by diffusion. We postulated that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf08c93194261e4653651726bc243766
https://doi.org/10.2136/sssaj1998.03615995006200010005x
https://doi.org/10.2136/sssaj1998.03615995006200010005x
Autor:
H. H. Janzen
Publikováno v:
Canadian Journal of Soil Science. 76:447-451
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d9e2ea1a110a531b7ee495a979d22f0
https://doi.org/10.4141/cjss96-055
https://doi.org/10.4141/cjss96-055
Autor:
H. H. Janzen, C. Chang
Publikováno v:
Journal of Environmental Quality. 25:785-790
Animal wastes are a valuable soil amendment, but when rates of application exceed crop nitrogen (N) requirements, N can leach into groundwater or be lost to the atmosphere. The prediction of optimum manure application rates, however, is complicated b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18d3aa37bc7e050f74c422fd57c126a5
https://doi.org/10.2134/jeq1996.00472425002500040019x
https://doi.org/10.2134/jeq1996.00472425002500040019x