As a rule of thumb, each 1% of soil organic matter by weight contains about 1,000 pounds of nitrogen in the plow layer. For a plow layer with 2% soil organic matter, one can expect the amount of N to be mineralized per growing season to equal about: over 120 pounds less than 10 pounds 15 pounds 120 pounds 40 pounds

As a rule of thumb, each 1% of soil organic matter by weight contains about 1,000 pounds of nitrogen in the plow layer. For a plow layer with 2% soil organic matter, one can expect the amount of N to be mineralized per growing season to equal about: over 120 pounds less than 10 pounds 15 pounds 120 pounds 40 pounds

Aquaculture Science

3rd Edition

ISBN:9781133558347

Author:Parker

Publisher:Parker

Chapter13: Aquatic Structures And Equipment

Section: Chapter Questions

Problem 2KA

See similar textbooks

Similar questions

The chronosequence of soil age across the Hawaiian Islands shows which of the following patterns of nutrient change? a. nitrogen and phosphorus increase continuously b. botth nitrogen and phosphorus start high then decrease c. nitrogen increases to a peak, then declines, while weatherable phosphorus declines to low levels fairly quickly (in geological terms) d. phosphorus increases continuously but nitrogen reaches a peak and then declines
For which of the following problems would growing and maintaining cover crops be an appropriate solution? Erosion is thinning the soil on a farm. The organic matter and nutrients in the soil on a farm are being depleted. The soil on a farm is becoming arid due to decreased water-carrying capacity. a I and II only b I and III only c II and III only d I, II, and III
Which of the following is a biotic factor? a. wind b. disease-causing microbe c. temperature d. soil particle size
The practice of crop rotation uses nitrogen fixation to create fertile fields. First, a plant without a nitrogen-fixing relationship, such as corn, is planted. After the harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the nitrogen-fixing plant, however, it is plowed under. The cycle continues in this manner. Which of the following is not an abiotic factor that affects plants being used in crop rotation? a) NH3 availability b) Soil temperature c) Herbivore density d) Oxygen concentration
fertilizers are necessary if the soil lacks one of the following nutrients: a. calcium, carbon, potassium b. nitrogen phosphorus, potassium c. nitrogen, phosphorus, magnesium d. nitrogen, calcium, magnesium e. phosphorus, potassium, magnesium
Decomposing organic matter in soil is called______ . a. clay d. silt b. humus e. sand c. topsoil f. leaching
The Philippines has long been facing different problems in the sector of agriculture. Cite two real-life scenarios/situations where you can see or observe the impacts of abiotic and biotic factors on crop production in the country (PH) . In what ways can you manage these factors to ensure agricultural productivity? (be as specific in giving abiotic/biotic stresses in real life example)
Which of the following accurately describes life in soils? A: Soil food webs lack complexity compared to above-ground ecosystems. B: Soils contain both decomposers and predators that perform important functions. C: We would need to collect a large soil sample size to find many species. D: Soil biota sometimes support plants in taking up nutrients. E: B and D. F: B, C, and D.
Farming and Agricultural Activities as Source of Soil PollutionDirections: Describe how the listed activities affect soil quality and quantity.
Suppose a scientist measures sunflower height six months after groups of sunflowers were planted with and without phosphorus in order to test the effect of phosphorus on sunflower growth. All flowers were grown in a nitrogen-abundant environment. Which of the following would be considered a standardized variable? A. The duration of plant growth, B. The presence or absence of nitrogen, C. The presence or absence of phosphorus, D. None of the choices are correct
Species that fit as remediatiors. EARTHWORN They promote bioremediation of organic contaminants by their physical , chemical and biological actions.They aerate the soil by their burrowing nature and increases the fertility and nutrient content in the soil. They can be used in vermicomposting of waste materials and the prepared compost can be used in growing agricultural produce thereby reducing the use of heavy toxic chemicals in the soil. QUESTION: Design a concept of bioremediation related to earthworm
If the pasture is 15% dry matter, how much (kg) fresh (wet) pasture is 18 kgDM?