Long-Term Lentil Green-Manure Replacement for Fallow in the Semiarid Northern Great Plains

2011 ◽  
Vol 103 (4) ◽  
pp. 1292-1298 ◽  
Author(s):  
Brett L. Allen ◽  
Joseph L. Pikul ◽  
Jed T. Waddell ◽  
Verlan L. Cochran
Keyword(s):  
Great Plains ◽  
Green Manure ◽  
Northern Great Plains

LONG-TERM ECOSYSTEM IMPACTS OF AN INTRODUCED GRASS IN THE NORTHERN GREAT PLAINS

Ecology ◽  
1999 ◽  
Vol 80 (7) ◽  
pp. 2397-2407 ◽  
Author(s):  
Janice M. Christian ◽  
Scott D. Wilson
Keyword(s):  
Great Plains ◽  
Northern Great Plains ◽  
Ecosystem Impacts

Long-Term Crop Rotation Effects on Production, Grain Quality, Profitability, and Risk in the Northern Great Plains

2017 ◽  
Vol 109 (3) ◽  
pp. 957-967 ◽  
Author(s):  
Elwin G. Smith ◽  
Robert P. Zentner ◽  
Con A. Campbell ◽  
Reynald Lemke ◽  
Kelsey Brandt
Keyword(s):  
Crop Rotation ◽  
Great Plains ◽  
Grain Quality ◽  
Northern Great Plains

scholarly journals Soil Carbon and Nitrogen of Northern Great Plains Grasslands as Influenced by Long-Term Grazing

1995 ◽  
Vol 48 (5) ◽  
pp. 470 ◽  
Author(s):  
A. B. Frank ◽  
D. L. Tanaka ◽  
L. Hofmann ◽  
R. F. Follett
Keyword(s):  
Soil Carbon ◽  
Great Plains ◽  
Northern Great Plains ◽  
Carbon And Nitrogen ◽  
Soil Carbon And Nitrogen

scholarly journals On the Identification and Characterization of Drought and Aridity in Postglacial Paleoenvironmental Records from the Northern Great Plains

2004 ◽  
Vol 56 (2-3) ◽  
pp. 229-246 ◽  
Author(s):  
Alwynne B. Beaudoin
Keyword(s):  
Global Warming ◽  
High Resolution ◽  
Great Plains ◽  
Northern Great Plains ◽  
Short Term ◽  
Instrumental Data ◽  
Proxy Records ◽  
Identification And Characterization

Abstract The Northern Great Plains region is especially sensitive to drought and is likely to be even more drought-prone under projected global warming. Drought has been invoked as an explanatory factor for changes seen in postglacial paleoenvironmental records. These proxy records may extend drought history derived from instrumental data. Moreover, in the last decade, some paleoenvironmental studies have been expressly undertaken for the examination of long-term drought history. Nevertheless, few such studies explicitly define drought. This makes it difficult to compare results or to understand what the results mean in terms of the operational drought definitions that are used in resource management. Operational drought is defined as usually short-term; longer sustained dry intervals reflect a shift to aridity. Therefore, high resolution paleoenvironmental proxies (annual or subdecadal) are best for the investigation of drought history. Such proxies include tree rings and some lake records. However, most lake-based records are sampled at lower resolution (decadal or subcentury) and are therefore providing aridity signals.

Optimal seeding rate for organic production of field pea in the northern Great Plains

2009 ◽  
Vol 89 (3) ◽  
pp. 455-464 ◽  
Author(s):  
J. M. Baird ◽  
F. L. Walley ◽  
S. J. Shirtliffe
Keyword(s):  
Great Plains ◽  
Green Manure ◽  
Inorganic Nitrogen ◽  
Block Design ◽  
Organic Production ◽  
Weed Suppression ◽  
Field Pea ◽  
Northern Great Plains ◽  
Seeding Rate ◽  
Post Harvest

Seeding rates have not been established for organic production of field pea in the northern Great Plains and producers must rely upon a recommended target stand of 88 plants m-2 for conventional production of this crop. This seeding rate may not be suitable as the two systems differ in the use of inputs and in pest management. The objective of this study was to determine an optimal seeding rate for organic production of field pea considering a number of agronomic factors and profitability. Field sites were established using a randomized complete block design with increasing seeding rates, summerfallow and green manure treatments. Seed yield increased up to 1725 kg ha-1 with increasing seeding rate. Weed biomass decreased with increasing seeding rate by up to 68%. Post-harvest soil phosphorus levels and soil water storage did not change consistently between treatments. Post-harvest soil inorganic nitrogen (N), however, was higher for the summerfallow and green manure treatments than for the seeding rate treatments. Field pea reached a maximum economic return at a seeding rate of 200 seeds m-2 and an actual plant density of 120 plants m-2. Organic farmers should increase the seeding rate of field pea to increase returns and provide better weed suppression. Key words: Pea (field), organic, seeding rate, weed suppression, profit, soil N

Trawling the Ocean of Grass: Soil Nitrogen in Saskatchewan Agriculture, 1916–2001

2021 ◽  
pp. 1-22
Author(s):  
Laura Larsen
Keyword(s):  
Great Plains ◽  
Soil Nitrogen ◽  
Soil Nutrient ◽  
First Century ◽  
Nitrogen Fertilizers ◽  
Northern Great Plains ◽  
Soil Nutrient Depletion ◽  
Biomass Yields ◽  
The 1960S

Abstract Using a socioecological metabolism approach to analyze data from the Census of Agriculture, this article examines the underlying soil fertility of two case study areas in the Canadian province of Saskatchewan through the calculation of soil nitrogen balances. The Rural Municipalities of Wise Creek and Livingston are 300 miles apart and therefore have different topography, soil types, and rainfall levels, even though both are within the northern Great Plains. Over 85 years, from first settlement in the 1910s until the beginning of the twenty-first century, Wise Creek agriculture focused increasingly on livestock production while in Livingston farmers began to grow a greater variety of crops, most notably incorporating canola into rotations. Despite the differences between the two case studies, the pattern of soil nitrogen losses was remarkably similar, with biomass yields declining along with soil nitrogen. The addition of chemical nitrogen fertilizers since the 1960s did not produce yields matching historic highs, nor did a renewed focus on livestock. Wise Creek and Livingston showed two different responses to declining yields, but neither one ultimately provided a long-term solution to the problem of soil nutrient depletion and consequent productivity declines.

scholarly journals Effect of green manure crops, termination method, stubble crops, and fallow on soil water, available N, and exchangeable P

2016 ◽  
Vol 96 (5) ◽  
pp. 867-886 ◽  
Author(s):  
S.P. Mooleki ◽  
Y. Gan ◽  
R.L. Lemke ◽  
R.P. Zentner ◽  
C. Hamel
Keyword(s):  
Great Plains ◽  
Green Manure ◽  
Field Experiments ◽  
Northern Great Plains ◽  
Available N ◽  
Sustainable Agricultural Systems ◽  
Lathyrus Sativus L ◽  
Nitrogen Phosphorus ◽  
Green Manure Crops ◽  
Exchangeable P

Green manure crops may have a role to play in the development of sustainable agricultural systems in the semiarid northern Great Plains of North America. This study determined the benefits of different green manure crops, seeding dates, and termination methods on soil nitrogen, phosphorus, and moisture, as well as the performance of durum wheat following green manures the following year. Field experiments were conducted at Swift Current, Saskatchewan, from 2006 to 2009. Three green manure crops [forage pea (Pisum sativum L.), chickling vetch (Lathyrus sativus L.), and black lentil (Lens culinaris Medik.)] were seeded in May, June, and July, and terminated at full bloom using glyphosate, rototilling or by frost. Other treatments included summerfallow and stubble of selected crops harvested for grain or silage. Different green manure crops, seeding dates or termination methods had similar effects on soil moisture, available N, and exchangeable P at termination or the following spring. These effects of green manure management on soil residual characteristics were comparable to those observed under summerfallow, but higher than those on grain or silage stubble. Therefore, green manure is a viable alternative to summerfallowing and could be seeded any time during the growing season. If seeded late, green manure could be terminated by frost, thus saving on costs.

Green manure and phosphate rock effects on phosphorus availability in a northern Great Plains dryland organic cropping system

2011 ◽  
Vol 1 (2) ◽  
pp. 81-90 ◽  
Author(s):  
Terry L. Rick ◽  
Clain A. Jones ◽  
Richard E. Engel ◽  
Perry R. Miller
Keyword(s):  
Great Plains ◽  
Green Manure ◽  
Phosphate Rock ◽  
Cropping System ◽  
Phosphorus Availability ◽  
Northern Great Plains
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