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Soil Fertility Exam2
| Question | Answer |
|---|---|
| 0-0-60 or KCL also contains 47% of this micronutrient. | Chloride |
| Which macronutrient is part of chlorophyll? | Magnesium |
| What type of soil has a greater risk of sulfur deficiency? | Sandy |
| This macronutrient is rarely deficient and is most common cation attached to soil? | Calcium |
| Potassium is needed to open and close these pores on plant leaves which control transpiration. | Stomata |
| Beside N and P which other nutrients have an anion as their plant available form? | Boron |
| What is a reason besides harvest removal that decreases pH over time? | leaching |
| Farmers are seeing more micronutrient deficiencies, what are 2 reasons for this? | - They are more visible because the macros are more efficient - Using up natural deposits because of higher crop yields |
| Besides soil test what are 2 ways to determine the need for a micronutrient application? | - plant symptoms - tissue test |
| Soybean varieties are rated based on their tolerance to this micronutrient deficiency. | Iron |
| Which micronutrient is alfalfa the biggest responder to? | Boron |
| Which micronutrient is corn a strong responder to? | Zinc |
| Which micronutrient is helps wheat because it suppresses fungal disease? | Chlordie |
| Raising pH to 6.8 can solve deficiencies of this micronutrient. | Molybmun |
| What macronutrient does lime contain? | Calcium |
| What chemical element is needed in small quantities in order for legume plants to fix nitrogen? | Cobalt |
| What is the term for when starter fertilizers are placed directly in the seed furrow? | Pop up |
| What 3 nutrients can cause salt injury when applied with starter fertilizer? | - Nitrogen - Potassium - Sulfur |
| Deficiencies of this micronutrient are most common when pH is above 7.0 | Iron |
| The reason acidic soils reduce yield is because this element becomes more available. | Aluminum |
| Which midwest crop is least tolerant to acidic conditions? | Alfalfa |
| How does poor drainage change soil pH? | Increases pH |
| What 2 soil properties determine how much lime is needed? | - pH - CEC |
| What chemical tool lowers pH but is uneconomical? | Elemental Sulfur |
| What crop nutrient is sometimes provided by treating the seed? | Zinc |
| What 2 factors effect the efficiency of a lime source in raising pH? | - Purity of Calcium Carbonate - Particle Size |
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