The effect of tillage and crop residue management on grain yields

Non-Peer Reviewe

The effect of inoculation on yields of grain legumes

Non-Peer Reviewe

Nitrogen fixation of several grain legumes in Saskatchewan

Non-Peer Reviewe

The effect of variable and uniform N-fertilizer application rates on grain yield

Non-Peer Reviewe

The quality of organic matter in Saskatchewan soils

Non-Peer ReviewedNitrogen mineralized from the active organic N fraction of soil organic matter sustained the requirements of cultivated crops for approximately 70 years after breaking the prairie grassland. However, in the past decade, the application of fertilizer N has become a common practice for ensuring optimum yields due largely to the major decrease in surface soil organic matter that has occurred with cultivation. Various management practices such as minimal tillage, elimination of cultivated fallow and inclusions of rotation containing legumes have been shown to significantly increase the quality of soil organic matter over a relatively short period

Nitrogen fertilizer placement with zero tillage

Non-Peer Reviewe

Influence of application of sewage sludge, sludge and manure compost on plant Ca and Mg concentrations and soil extractability

Non-Peer Reviewe

Fertilizer management practices for winter wheat

Non-Peer ReviewedNitrogen (N) management practices for winter wheat including side banding at time of seeding, broadcasting in early December, and in April, were evaluated at nine locations in the province. Under the widely ranging climatic conditions that prevailed over the 1982-83 winter period and the 1982 growing season, side banding the N at time of seeding in the fall was equally as good as broadcasting the N in mid-April. Broadcast applications of urea made in early December resulted in disappointing yield increases. It is concluded from these experiments that where the nitrogen is side banded in the fall, spring wheat soil test guidelines for the humid areas of the province should be applicable to winter wheat grown in any soil zone. Unequal distribution of crop residues was shown to seriously reduce yields of winter wheat, possibly as a result of the production of phytotoxic compounds

Influence of application of sewage sludge and manure compost on crop Zn concentration and soil Zn availability index in a loamy sand soil in Ontario

Non-Peer Reviewe

Carbon dioxide efflux from the floor of a boreal aspen forest. II. Evaluation of methods - verification by infra-red analysis of a dynamic closed chamber

Russell, C. A., Voroney, R. P., Black, T. A., Blanken, P. D. and Yang, P. C. 1998. Carbon dioxide efflux from the floor of a boreal aspen forest. II. Evaluation of methods — verification by infra-red analysis of a dynamic closed chamber. Can. J. Soil Sci. 78: 311–316. Concern over the global exchange of carbon has highlighted the need for reliable estimates of soil CO efflux (soil Fc). Appropriate methods to estimate soil Fc must be identified and adopted. In this study we used a dynamic closed chamber and infra-red gas analyzer (DCC-IRGA) to verify the use of three other methods in a boreal aspen (Populus tremu- loides) forest. The three methods were: (1) soil CO ry (a) and empirical relationship (b), (2) an automated steady-state chamber and (3) daytime estimates derived from a relationship between soil temperature and nighttime eddy correlation measures of CO fluxes above the forest understory (4 m) and overstorey 2 concentration gradients and volumetric soil moisture by both diffusion theo- 2 (39 m). We found reasonable agreement between DCC-IRGA and method 1a (R2 = 0.44 to 0.62), and excellent agreement between DCC-IRGA and the other methods (1b, R2 = 0.76 to 0.88; 2, R2 = 0.89 and 3, R2 = 0.64 to 0.80). Each of these methods has advan- tages beyond the scope of the DCC-IRGA, and these are discussed