Exam 16: Practical Nutrient Management

In recent years, a soil test for nitrogen has been developed and widely used in humid regions in predicting how much nitrogen will need to be applied to supplement natural mineralization in the soil.This test is called the _______.

The primary means to avoid non-point source nitrogen and phosphorus pollution in agricultural watersheds is to avoid applications that bring the available supply of these nutrients in soils to amounts higher that can be used by crop plants.

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

Concentrated animal production as is practiced in modern industrial agriculture usually results in ______.

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

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

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.

Based on the data given in the Table, if the revegetation site were limed and fertilized with nitrogen, would you also recommend the addition of P fertilizer to improve tree growth?

Many years of research have confirmed that the quadratic (parabolic curve) model is the best method of making fertilizer recommendations based on response curves, especially if environmental quality is a high priority.

Consider the data in the accompanying Table giving the average height of 10 trees planted in order to revegetate a disturbed soil.What was the first limiting factor for tree growth on this soil?

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

Perforation placement is usually used to fertilize _____.

Buffer strips principally function in nutrient management to _______.

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

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

Soil test interpretations have been developed so that for most fields testing "high" in a nutrient, addition of that nutrient will not increase yield enough to more than pay for the cost of applying the nutrient.

When banding fertilizer, the material should be placed about 1 or 2 cm below the seed being planted.

Buffer strips are usually a last-resort mechanism of pollution control because of their expense and unfavorable side-effects.

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.

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