When should you apply nitrogen to soybeans?
Apply N from full bloom (R2) through beginning pod (R3) or full pod (R4). Apply 20 to 50 pounds of N either as liquid or dry urea either dribbled on the soil surface, or broadcast. Apply a foliar feed with some N to make sure the plant’s metabolic machinery is working at optimal capacity.
How much nitrogen do soybeans make?
Soybean and Nitrogen Soybean nitrogen requirement can reach almost 325 lb/a for 70 bu/a yield with about 50-60% of the N coming from nitrogen fixation.
Do you put nitrogen on soybeans?
Soybean contains approximately 40% protein in the grain, which is rich in nitrogen (N); therefore, soybean needs for N are high. Soybean is able to fix most of the N it needs through its symbiotic relationship with rhizobia bacteria. It also takes up residual and mineralized N from the soil.
How many pounds of nitrogen do soybeans need?
On average, soybean needs to absorb 4.8 lbs of N per bushel produced. Hence, a soybean crop that produces 50 bu/ac (similar to current Nebraska average) will need to absorb 240 lbs N per acre. In contrast, a well-managed, irrigated crop that produces 80 bu/ac will need about 384 lbs N per acre.
Do soybeans need nitrogen fertilizer?
The soybean crop has a high requirement for nitrogen; the crop takes up nearly 5 pounds of nitrogen per bushel, and about 75 percent of that is removed in the harvested crop. Nitrogen fixation takes a considerable amount of energy in the form of sugars produced by photosynthesis in the crop.
Does soybeans need fertilizer?
Soybeans do not require high fertilizer application rates, yet, an accurate nutritional plan is necessary for increasing yields. Soybeans grains have a nitrogen content of 40%, therefore an adequate fertilization of nitrogen is a key factor in achieving high quality yields.
Do soybeans need sulfur?
Soybeans generally require less sulfur than corn; however, soybean response to sulfur application has been recently observed. The University of Minnesota suggests that 10 to 15-lbs S broadcast per acre should be adequate for soybeans in at-risk fields.
Does fertilizing soybeans pay?
Traditionally, soybeans do not received much, if any, fertilizer. Soybeans are efficient in providing their own nitrogen through biological nitrogen fixation and typically, there has been enough residual phosphorus and potassium left behind by previous crops to provide essential nutrients.
Do soybeans need lime?
Optimum soybean yields cannot be achieved without adequate lime. Soybeans are more sensitive to high levels of soil acidity than most other field crops. The optimum pH for soybeans on sandy and clay-textured soils ranges from 5.8 to 6.2.
Do soybeans add nitrogen to soil?
When legumes die, their residue is easily broken down by microorganisms that release nitrogen back into the soil. Soybeans can add 30 to 50 pounds of nitrogen per acre to the soil. When grown in rotation with corn, grain sorghum or wheat, outside nitrogen fertilizer can be reduced.
Do soybeans need zinc?
Studies have also shown that soybeans need an additional source of nitrogen because they cannot fix enough nitrogen to match the amount they need to finish their life cycle. The one nutrient we always remember to put into corn starters that we leave out of soybean starters is zinc.
What nutrients do soybeans need?
Soybeans require 14 mineral nutrients for growth: nitrogen (N), phosphorus (P), potassium (K), sulfur (S), calcium (Ca), magnesium (Mg), copper (Cu), iron (Fe), manganese (Mn), zinc (Zn), boron (B), chloride (Cl), molybdenum (Mo) and nickel (Ni) to grow successfully.