Using 3-D MODFLOW to predict salt movement under feedlot holding ponds

Non-Peer ReviewedMODFLOW was used as modeling tool to predict salt movement under three different types of feedlot waste storage ponds: a typical shallow holding pond with a clay liner, a deep unlined pit lagoon, and a shallow evaporation pond with a compacted clay liner. We found that the measured hydraulic parameters and the layer characterization of the underlying strata was not always an exact science. Nonetheless, once the model was calibrated and refined, the outcome appeared realistic

Irrigation water quality-soil compatibility guidelines for Saskatchewan

Non-Peer Reviewe

Tilth of virgin, cultivated, and zero-till soils

Non-Peer Reviewe

Effect of spring moisture and monthly rainfall on wheat yields in southwestern Saskatchewan

Non-Peer Reviewe

Response of wheat to fertilizer in the southwest

Non-Peer Reviewe

Part II: Cultural practices in Saskatchewan in 1990 and 2000 and effects on productivity

Non-Peer Reviewe

Historical perspective of cultural practices in relation to productivity and drought – part 1

Non-Peer Reviewe

Mapping soil salinity using four-probe resistance techniques

Non-Peer Reviewe

Miracle chemicals – can they aid salinity?

Non-Peer Reviewe

Steiner t-designs for large t

One of the most central and long-standing open questions in combinatorial design theory concerns the existence of Steiner t-designs for large values of t. Although in his classical 1987 paper, L. Teirlinck has shown that non-trivial t-designs exist for all values of t, no non-trivial Steiner t-design with t > 5 has been constructed until now. Understandingly, the case t = 6 has received considerable attention. There has been recent progress concerning the existence of highly symmetric Steiner 6-designs: It is shown in [M. Huber, J. Algebr. Comb. 26 (2007), pp. 453-476] that no non-trivial flag-transitive Steiner 6-design can exist. In this paper, we announce that essentially also no block-transitive Steiner 6-design can exist.Comment: 9 pages; to appear in: Mathematical Methods in Computer Science 2008, ed. by J.Calmet, W.Geiselmann, J.Mueller-Quade, Springer Lecture Notes in Computer Scienc