Exam 16: Practical Nutrient Management

The nutrient element magnesium is often supplied by which type of application?

Integrated nutrient management seeks to apply,as fertilizer,enough of each nutrient to replace that removed from the soil by plant uptake.

For most soils,even if they test "high" in a nutrient such as potassium or nitrogen,it is necessary to apply at least as much of each nutrient as is removed in the harvest,if the soil is not to eventually become infertile and unproductive.

The forestry industry uses fertilizers most often to treat old growth stands that will produce valuable lumber

The PSNT nitrogen soil test is designed to be used in growing _____.

As runoff water flows across a grassed buffer strip,the concentrations of N and P in the water decrease slowly at first,but if the buffer strip is sufficiently wide,major reductions in these concentrations will occur just before the water leaves the buffer.

Of the macronutrients,which can be most correctly said to be a renewable resource?

Perforation placement is usually used to fertilize _____.

A cover crop is usually grown for the purpose of _________.

For a year or so after clear-cut (even-aged)harvesting large areas of mature forest,the streams draining the watershed can be expected to carry ______ than before the harvest.

The place where the manure pile was stored last year,a narrow strip that used to be a limestone gravel farm road,and the spot where fertilizer is usually transferred from a nurse truck to the tractor spreader are all examples of parts of a 25 hectare field that should be treated as follows when sampling soil for the soil test lab.

For most plants the relationship between plant tissue concentration of a nutrient and the dry matter production of the plant is linear until toxicity begins to have an effect.

To monitor the effects of management on soil fertility,it is best to sample the soils in an area _______.

Soil test interpretations have been developed so that for most fields testing "low" in a nutrient,addition of that nutrient will increase yield enough to more than pay for the cost of applying the fertilizer.

Modern nutrient management is designed to _____________.

Most research has shown that at both high and low fertilization levels,about 15 to 20% of the nitrogen applied as fertilizer will be lost by leaching from medium textured soils growing corn.

Well-vegetated buffer strips 10 to 20 meters wide can be expected to reduce the total N content of runoff water by about ______.

Fertilization to supply the nutrient element iron is often accomplished by which type of application?

To enable the most consistent and appropriate interpretations,all soil samples submitted to a particular soil test lab should be taken from the same soil depth,regardless of differences in the type of tillage used or plants grown.

Most chemical fertilizers are inorganic salts.