Plant population and weed control in hemp production

Non-Peer ReviewedA field experiment was conducted at Melfort, SK in 2000 and 2001 to determine the effects of seeding rate and row spacing on oilseed hemp (Cannabis sativa L.) production. High seeding rates significantly reduced weed infestation, and increased seed yield and biomass production of hemp. Narrow row spacing reduced weed infestation only in 2000 (wet), and did not have any significant effect on seed yield or biomass production in either year

Feasibility of a new granular rapid release elemental S (RRES) fertilizer in preventing S deficiency in canola on a S-deficient soil

Non-Peer Reviewe

Potential of wheat cultivars in optimizing seed yield for organic crop production on a P-deficient soil

Non-Peer Reviewe

Potential of rock phosphate and other organic/inorganic amendments in preventing P deficiency in barley on a P-deficient soil in northeastern Saskatchewan

Non-Peer Reviewe

How hungry is hemp for fertilizers?

Non-Peer ReviewedA field experiment was conducted at Melfort, SK in 2000 and 2001 to determine the effects of nitrogen and phosphorus fertilizer rates on hemp (Cannabis sativa L.) productivity. Increased nitrogen fertilizer rates significantly increased seed yield and biomass production of hemp. The application of seed-placed phosphorus fertilizer, on the other hand, significantly reduced emergence, seed yield and biomass production in a dry year

Potential of a new granular rapid release elemental S (RRES) fertilizer in preventing S deficiency in canola on a S-deficient

Non-Peer Reviewe

Feasibility of rock phosphate and other amendments in preventing P deficiency in barley on a P-deficient soil in northeastern Saskatchewan

Non-Peer Reviewe

Forage yield of unfertilized perennial crops in simple and complex mixtures under two management strategies in northeastern Saskatchewan

Non-Peer ReviewedA field experiment was sown on May 27, 2008 at Melfort, Saskatchewan (52O44’N 104O47’W) on a thick Black Chernozem (Udic Boroll) silty clay soil to compare the effects of perennial forage crop monocultures and mixtures on dry matter yield (DMY) under two-cut and three-cut management systems in 2009, 2010 and 2011. The 11 treatments were consisted of monocultures of alfalfa, crested wheatgrass, hybrid bromegrass, intermediate wheatgrass, smooth bromegrass and in mixtures with alfalfa; a more complex mixture of smooth and hybrid bromegrass, intermediate and crested wheatgrass and alfalfa, and finally a very complex mixture consisting of the complex mixture plus orchardgrass, tall fescue, timothy, meadow bromegrass and slender wheatgrass. The alfalfa was inoculated with rhizobium, and no fertilizer was added to any treatment during the course of this study. In 2009, the first cutting year, all treatments produced similar forage DMY, with the monoculture grasses yielding almost as much as that of their mixture with alfalfa. In 2010 and 2011, monoculture alfalfa was the highest yielding treatment under both two and three cut methods. The two cut system yielded higher in all years for both treatments, except alfalfa in 2010. The complex and very complex mixtures yielded higher than the monoculture grass treatments, but did not yield higher than the simple alfalfa grass mixtures or the monoculture alfalfa treatment. In conclusion, the inclusion of alfalfa in unfertilized grass mixtures increased forage yield, especially after the first year

Comparative forage yield and species composition of “poor” versus “good” condition grass stands under different soil fertility regimes in northeastern Saskatchewan

Non-Peer Reviewe

Constraining slow-roll inflation with WMAP and 2dF

We constrain slow-roll inflationary models using the recent WMAP data combined with data from the VSA, CBI, ACBAR and 2dF experiments. We find the slow-roll parameters to be $0 < \epsilon_1 < 0.032$ and $\epsilon_2 + 5.0 \epsilon_1 = 0.036 \pm 0.025$. For inflation models $V \propto \phi^{\alpha}$ we find that $\alpha< 3.9, 4.3$ at the 2$\sigma$ and $3\sigma$ levels, indicating that the $\lambda\phi^4$ model is under very strong pressure from observations. We define a convergence criterion to judge the necessity of introducing further power spectrum parameters such as the spectral index and running of the spectral index. This criterion is typically violated by models with large negative running that fit the data, indicating that the running cannot be reliably measured with present data.Comment: 8 pages RevTeX4 file with six figures incorporate