Digging into Research
In a grain legume-wheat rotation, belowground residue consisting of roots, rhizodeposits, residual fertilizer and soil-N contributed 70 to 91% of wheat N uptake, with 66% of N uptake from the indigenous soil N pool. Wheat yield was statistically highest following lentil and pea, which were...
A two year study found that the alternate nitrogen (N) fertilizer sources ammonium sulfate nitrate and calcium ammonium nitrate did not perform any better than urea N fertilizer. Treatment with a urease, nitrification or dual inhibitor had few benefits. A two-year field study assessed the impact...
Canary seed grain yield was increased with side-band applications of nitrogen, phosphorus, sulphur, potassium, and chloride by between 29% and 187% compared to unfertilized treatment in five of six site-years. Canary seed yield was not responsive to copper, zinc and boron, but was responsive to...
Phosphorus (P) fertilization did not increase seed yield, regardless of P rate, P placement or Olsen soil test P level, except for one out of 28 site-years. High rates of seed-placed P reduced stand establishment at 5 of 28 site-years. Limited research had been conducted on...
On Dark Brown soils, the use of a dual-inhibitor EEF resulted in increased grain yield and delivered improved net return benefit compared to urea. Other EEF sources tested yielded similarly in the Dark Brown soils. However, in the Black and Grey soils, the EEFs tested...
In this 2-year study, there was no significant benefit of a urease inhibitor, with or without a nitrification inhibitor, on canola and wheat N removal, N uptake, nitrogen use efficiency or yield. These inhibitors also did not significantly reduce the amount of leached nitrate in...
Nitrification-inhibitor products – either alone or in combination with an urease inhibitor – reduced N2O emissions by 38% to 43% compared to untreated urea in spring wheat in southern Manitoba. However, there were few yield or grain protein benefits to using the EEFs products. Environment and...
Starter phosphorus (P) and zinc (Zn) fertilizer increased early-season growth, plant height, P concentration, and uptake of P and Zn in plant tissue, relative to the unfertilized control. In some cases, starter fertilizer reduced days to maturity and grain moisture content. The largest responses were...
Canola yield increased by up to 40% with increasing N rate up to 134 lbs/ac (150 kg/ha) pre-plant (i.e. close to seeding) application via broadcast or banding. There was no significant difference in yield between pre-plant only N application and a split pre-plant plus top-dress...
In western Canada, no-till improved wheat yield by 7%, canola by 10%, and legumes like beans, peas and lentils by 9% compared to conventional tillage. These higher yields provide higher carbon inputs into the soil to help increase soil organic carbon and reduce greenhouse gas...
