Which mineral element is considered a primary macroelement?
Which mineral element is considered a primary macroelement?
Which mineral element is considered a secondary macroelement?
Which mineral element is considered a secondary macroelement?
Which mineral element is considered a microelement?
Which mineral element is considered a microelement?
Which mineral element is considered a microelement?
Which mineral element is required by plants is the highest amount?
When fertilizing greenhouse-grown crops, as a general guideline, phosphorus should be provided to the plants at what percentage (%) of the rate that nitrogen is supplied?
Which fertilizer salt would provide nitrogen and be considered an acidic fertilizer?
In addition to serving as a calcium source, which mineral element does dolomitic limestone provide that calcitic limestone does not provide?
Which fertilizer salt could be used in the fertilization program to help neutralize the effect of an alkaline irrigation water?
In addition to the amount (concentration) of an element applied, which other factors should be considered when designing a fertilization program?
Based upon a saturated media extract (SME) test, what would be an acceptable E.C. level (mS/cm) for an actively growing bedding plant crop?
Based upon a saturated media extract (SME) test, what would be an acceptable phosphorus (P) level (ppm) for an actively growing bedding plant crop?
Based upon a saturated media extract (SME) test, what would be an acceptable calcium (Ca) level (ppm) for an actively growing bedding plant crop?
Based upon a saturated media extract (SME) test, what would be an acceptable iron (Fe) level (ppm) for an actively growing bedding plant crop?
The first number on the analysis of a fertilizer represents the percentage by weight of which mineral element?
A 200 lb container of 20-20-20 contains how much (lbs) phosphorus (P)?
A fertilizer with the statement, "Potential acidity: 389 lb calcium carbonate equivalent per ton" will, with continued use and excluding all other factors, have what effect of the pH of the growing medium?
. How many grams of 20-20-20 are required to make 100 liters of fertilizer solution that would contain 200 ppm nitrogen?
How many grams of 15-5-15 would be required to formulate 100 liters of a stock solution that when put through a 100:1 injector would supply a fertilizer solution containing 250 ppm nitrogen to the crop?
How many kilograms of 15-5-15 would be required to formulate 100 gallons (use 3.78 liters per gallon) of a stock solution that when put through a 100:1 injector would supply a fertilizer solution containing 200 ppm nitrogen to the crop?
How many kilograms of potassium nitrate (KNO3) would be required to formulate 100 gallons (use 3.78 liters per gallon) of a stock solution that when put through a 100:1 injector would supply a fertilizer solution containing 250 ppm nitrogen to the crop? Assume the fertilizer salt is pure KNO3 ?
How many kilograms of potassium nitrate (KNO3) and calcium nitrate Ca(NO3)2 would be required to formulate 100 liters of a stock solution that when put through a 100:1 injector would supply a fertilizer solution containing 200 ppm nitrogen to the crop with 50 ppm of the nitrogen coming from the calcium nitrate and 150 ppm of the nitrogen coming from the potassium nitrate? Assume both fertilizer salts are pure.