Question 1
Measuring which of the following soil properties would provide a good indication of root penetration, air-filled pore space, and microbial activity in the soil?
◦ soil OM
◦ microbial biomass
◦ bulk density
◦ sodicity
Question 2
Michelle wants to increase rotation productivity on her farm by reducing pesticide use and ensuring that recovery of residual nutrients applied to the previous crop. Also, she prefers minimal initial investment on equipment and labor. Which of the following sets of agronomic principles would help her best in designing an effective crop rotation sequence?
◦ two-season interval between the same crop; livestock diversified farming; crops with high nutrient demand; variation in crop rotation sequence
◦ three-season interval between the same crop; vegetable crops for rotation; crops with high nutrient demand; variation in crop rotation sequence
◦ two-season interval between the same crop; vegetable crops for rotation; crops with slow germination and root growth; constant crop rotation sequence
◦ two-season interval between the same crop; livestock diversified farming; intensive tillage before planting; constant crop rotation sequence
Paland and Lynch demonstrated the importance of sexual reproduction in reducing the frequency of mal
Primary production increases with an increase in total phosphorus concentration.
Estimated terrestrial net primary productivity across Canada.
Altamont Pass Wind Farm in California
The experimental system that permits observation of rotation in the F1 component of F1F0 ATP (c)
Environmental problems: DDT, a pesticide