AGRONOMIC EVALUATION OF MINIMUM TILLAGE SYSTEMS FOR SUMMER FALLOW IN SOUTHERN ALBERTA

1981 ◽  
Vol 61 (2) ◽  
pp. 247-253 ◽  
Author(s):  
C. W. LINDWALL ◽  
D. T. ANDERSON

Eight summer-fallow methods for spring wheat production were compared in terms of weed control, crop residue conservation, soil erodibility, moisture conservation, NO3-N of the soil, and wheat yield on a clay loam soil from 1968 to 1976. Repeated applications of herbicides were as effective as tillage for controlling weeds during the summer-fallow season. Crop residue and soil moisture conservation were greatest when weeds were controlled with herbicides instead of tillage. Chemical fallows conserved 67% of the original crop residue compared with 43% of bladed fallows. Wheat yields from treatments involving little or no tillage during the fallow season were consistently greater than those from conventionally tilled treatments. The chemical fallow treatment with one tillage operation in the fall of the fallow season generally produced the highest yields. Although differences were small, there was some evidence, in terms of soil NO3-N levels and protein content of wheat, that wheat grown on chemical fallow may require additional nitrogen to improve moisture utilization and give maximum yields.

Author(s):  
Jim J. Miller ◽  
Mallory Owen ◽  
Ben Ellert ◽  
Xueming Yang ◽  
Craig F. Drury ◽  
...  

The objective was to quantify the effect of crop rotations, crop type, life cycle, nitrogen fertilizer, manure application, and fallow on soil hydrophobicity (SH). The SH was measured for a long-term (16 yr) dryland field experiment on a Dark Brown clay loam soil in southern Alberta, Canada. Mean SH was significantly (P ≤ 0.05) greater in rotations with grass, perennial crops, manure application, and continuous cropping; whereas cereal-legume rotations and N fertilizer effects were undetectable. A strong, positive correlation occurred between SH and soil organic carbon concentration (r=0.73). Soil water repellency should be measured on these plots using water-based methods.


1971 ◽  
Vol 51 (3) ◽  
pp. 397-403 ◽  
Author(s):  
C. H. ANDERSON

Chemical treatments using contact and systemic herbicides were compared with cultivation for summerfallow preparation on a Wood Mountain clay loam soil from 1964 to 1969, inclusive. Use of chemical alone was equal to cultivation in its effect on soil moisture conservation, soil temperature and yield of wheat. Summerfallow prepared by chemical only conserved 62% of the original crop residue, compared with 35% for normal cultivated fallows. Chemically prepared fallows were less erodible (fewer soil particles < 1 mm in diameter) at die completion of tillage in the autumn than cultivated fallows. However, the chemically fallowed soils exhibited the least aggregation over winter and were slightly more erodible by spring than the cultivated soils. The general trend was for lower NO3-N values in the fall and prior to seeding in the spring for wholly chemical than for wholly cultivated summerfallow, but the differences were not usually significant.


1975 ◽  
Vol 55 (2) ◽  
pp. 477-484 ◽  
Author(s):  
E. D. SPRATT ◽  
J. H. STRAIN ◽  
B. J. GORBY

Two experiments, each consisting of six 3-yr crop rotations were conducted in Manitoba from 1965 to 1970, one on Assiniboine clay loam soil and the other on Miniota sandy loam soil. Each crop rotation included 2 yr of wheat (Triticum aestivum L.), after summer fallow, biennial yellow sweet clover (Melilotus officinalis (L.) Lam.), potatoes (Solanum tuberosum L.), corn, (Zea mays L.), oat hay (Avena sativa L.) or flax (Linum usitatissimum L.). On the clay loam soil, yields of wheat were not significantly higher after summer fallow than after sweet clover, and on the sandy loam soil no higher than after sweet clover, potatoes, corn or oat hay. On both soils, protein content of the wheat grain was highest after summer fallow and sweet clover, which can be related to the higher nitrate content of the soils. Summer-fallowing did not increase fall moisture and nutrient reserves significantly above the levels reached after some of the summer fallow substitutes and did not control weeds any better than potatoes or oats. Potatoes, sweet clover and oat hay on clay loam soil, and potatoes, corn and oat hay on the sandy loam soil yielded well and thus were profitable summer fallow substitutes. Consequently, summer-fallowing as a cultural practice should be minimized in western Manitoba and probably in all of the Black soil zone of the Canadian prairies.


Author(s):  
Mohammed Aajmi Salman ◽  
Jawad A. Kamal Al-Shibani

Beneficial microorganisms play a key role in the availability of ions minerals in the soil and use Randomized Complete Block Desing ( R.C.B.D ). The objective of this paper to the study effect of the of biofertilizer and miniral treatments on availability of NPK for crop corn zea mays L.Two types of biofertilizer are Bacterial Bacillus subtilis and Fungal Trichoderma harianum. Three levels of potassium fertilizer are (2.9533, 0.4000 and 2.9533). A field experiment in fall season of 2018 Has been conducted in silty clay loam soil. The experimental Results indicated that Bacillus and Trichoderma inoculation separately or together Have made a significant effect to increase in the availability of N P K in the soil compare to other treatments. The grain yield is where (2.9533, 0.4000 and 2.9533) of bacterial and fungal bio-fertilizer and potassium fertilizers respectively as compared to the control.


2012 ◽  
Vol 2 (2) ◽  
pp. 374-375
Author(s):  
Asha Buliya ◽  
◽  
K. C. Pancholi K. C. Pancholi ◽  
R. K. Paliwal R. K. Paliwal

2020 ◽  
Vol 8 (6) ◽  
pp. 1038-1041
Author(s):  
C Bharathi ◽  
P Murali Arthanari ◽  
C Chinnusamy

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