Degradation of C-Atrazine Bound Residues in Brown Soil and Rendzina Fractions

2002 ◽  
Vol 31 (1) ◽  
pp. 241 ◽  
Author(s):  
C. Munier-Lamy ◽  
M.P. Feuvrier ◽  
T. Choné
Keyword(s):  
Brown Soil ◽  
Bound Residues

Degradation of 14 C-Atrazine Bound Residues in Brown Soil and Rendzina Fractions

2002 ◽  
Vol 31 (1) ◽  
pp. 241-247 ◽  
Author(s):  
C. Munier-Lamy ◽  
M.P. Feuvrier ◽  
T. Choné
Keyword(s):  
Brown Soil ◽  
Bound Residues

Crop and soil nitrogen status of tilled and no-tillage systems in semiarid regions of Saskatchewan

2002 ◽  
Vol 82 (4) ◽  
pp. 489-498 ◽  
Author(s):  
B G McConkey ◽  
D. Curtin ◽  
C A Campbell ◽  
S A Brandt ◽  
F. Selles
Keyword(s):  
Grain Yield ◽  
Protein Concentration ◽  
Grain Protein ◽  
Soil N ◽  
Grain Protein Concentration ◽  
Brown Soil ◽  
Semiarid Regions ◽  
Soil Zone ◽  
Tillage System ◽  
Loam Soil

We examined 1990-1996 crop and soil N data for no-tillage (NT), minimum tillage (MT) and conventional tillage (CT) systems from four long-term tillage studies in semiarid regions of Saskatchewan for evidence that the N status was affected by tillage system. On a silt loam and clay soil in the Brown soil zone, spring what (Triticum aestivum L.) grain yield and protein concentration were lower for NT compared with tilled (CT or MT) systems for a fallow-wheat (F-WM) rotation. Grain protein concentration for continuous wheat (Cont W) was also lower for NT than for MT. For a sandy loam soil in the Brown soil zone, durum (Triticum durum L.) grain protein concentration was similar for MT and NT for both Cont W and F-W, but NT had higher grain yield than MT (P < 0.05 for F-W only). For a loam soil in the Dark Brown soil zone, wheat grain yield for NT was increased by about 7% for fallow-oilseed-wheat (F-O-W) and wheat-oilseed-wheat (W-O-W) rotations. The higher grain yields for NT reduced grain protein concentration by dilution effect as indicated by similar grain N yield. However, at this site, about 23 kg ha-1 more fertilizer N was required for NT than for CT. Elimination of tillage increased total organic N in the upper 7.5 cm of soil and N in surface residues. Our results suggest that a contributing factor to decreased availability of soil N in medium- and fine-textured soils under NT was a slower rate of net N mineralization from organic matter. Soil nitrates to 2.4 m depth did not indicate that nitrate leaching was affected by tillage system. Current fertilizer N recommendations developed for tilled systems may be inadequate for optimum production of wheat with acceptable grain protein under NT is semiarid regions of Saskatchewan. Key words: Tillage intensity, N availability, soil N fractions, N mineralization, crop residue decomposition, grain protein

Characterization of bound residues of nitrofen in cereal grains

1975 ◽  
Vol 23 (6) ◽  
pp. 1095-1097 ◽  
Author(s):  
Joseph P. Wargo ◽  
Richard C. Honeycutt ◽  
Irving L. Adler
Keyword(s):  
Cereal Grains ◽  
Bound Residues

Formation of Bound Residues of 8-Hydroxybentazon by Oxidoreductive Catalysts in Soil

2002 ◽  
Vol 50 (12) ◽  
pp. 3507-3511 ◽  
Author(s):  
Jong-Soo Kim ◽  
Jong-Woo Park ◽  
Sung-Eun Lee ◽  
Jang-Eok Kim
Keyword(s):  
Bound Residues

Economics of rotation and tillage systems for the Dark Brown soil zone of the Canadian Prairies

1992 ◽  
Vol 24 (3) ◽  
pp. 271-284 ◽  
Author(s):  
R.P. Zentner ◽  
S.A. Brandt ◽  
K.J. Kirkland ◽  
C.A. Campbell ◽  
G.J. Sonntag
Keyword(s):  
Tillage Systems ◽  
Canadian Prairies ◽  
Brown Soil ◽  
Soil Zone

DEVELOPMENT AND YIELD OF CANADIAN WESTERN RED SPRING AND CANADA PRAIRIE SPRING WHEATS AS AFFECTED BY DELAYED SEEDING IN THE BROWN AND DARK BROWN SOIL ZONES OF SASKATCHEWAN

1990 ◽  
Vol 70 (3) ◽  
pp. 639-660 ◽  
Author(s):  
H. W. CUTFORTH ◽  
C. A. CAMPBELL ◽  
D. JUDIESCH ◽  
R. M. DePAUW ◽  
J. M. CLARKE ◽  
...  
Keyword(s):  
Protein Concentration ◽  
Grain Quality ◽  
Frost Damage ◽  
Wheat Cultivars ◽  
Brown Soil ◽  
Soil Zone ◽  
Seeding Date ◽  
Optimum Period ◽  
Early Fall ◽  
The Difference

Historically, research has identified the optimum period of seeding Canadian Western Red Spring (CWRS) wheat in the Brown soil zone to be between late April and mid-May, and approximately mid-May in the Dark Brown soil zone. The recent development and release of new spring wheat cultivars with significantly different genetic makeup (Canada Prairie Spring (CPS) wheats) prompted this study to determine if the established criteria were valid for them. Seeding date experiments involving one CWRS wheat (Neepawa) and three CPS wheats (HY320, HY355, HY912) were carried out at Swift Current (1984–1988) and at Regina and Scott (1985–1988). Although significant seeding date × cultivar interactions occurred for several of the characteristics measured (e.g., yield, protein concentration), no cultivar consistently responded differently than the others. However, the difference in days to reach maturity between the later maturing CPS cultivars and the CWRS cultivar, Neepawa, generally increased with delayed seeding making the CPS cultivars more susceptible to early fall frost damage which could decrease their yields and grain quality. Our results showed no reason to change recommendations for seeding dates in either soil zone, and both types of wheat can be treated similarly except that late seeding for CPS wheats should be avoided.Key words: Seeding date, grain yield, GDD, protein, wheat

Impact of tillage and landscape position on nitrogen availability and yield of spring wheat in the Brown soil zone in southwestern Saskatchewan

1998 ◽  
Vol 78 (3) ◽  
pp. 563-572 ◽  
Author(s):  
V. Jowkin ◽  
J. J. Schoenau
Keyword(s):  
Spring Wheat ◽  
Nitrogen Availability ◽  
N Uptake ◽  
Wheat Crop ◽  
N Availability ◽  
Inorganic N ◽  
Brown Soil ◽  
Soil Zone ◽  
No Till ◽  
Crop N Uptake

Nitrogen availability to a spring wheat crop was examined in the cropping season in a side-by-side comparison of no-till (first year) and tillage fallow in an undulating farm field in the Brown soil zone in southwestern Saskatchewan. Thirty different sampling points along a grid in each tillage landscape were randomly selected, representing 10 each of shoulder, footslope and level landscape positions. Nitrogen availability was studied i) by profile inorganic N content ii) by crop N uptake and yield of spring wheat (Triticum aestivum L.) and iii) by 15N tracer technique and in situ burial of anion exchange resin membranes (AEM).Pre-seeding available moisture content of the surface soil samples was significantly higher under no-till compared with tillage fallow. However, no significant differences in pre-seeding profile total inorganic N, crop N uptake and yield were observed between the treatments. At the landform scale, shoulder positions of the respective tillage systems had lower profile inorganic N, crop N uptake and yield compared with other slope positions. Soil N supply power, as determined by 15N tracer and AEM techniques, was not significantly different between the tillage treatments, indicating that N availability is not likely to be greatly affected in initial years by switching to no-till fallow in these soils under normal moisture conditions. Key words: Summerfallow, landscape, nitrogen, wheat

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