The science behind field-scale farming, for agriculture students and new farmers: soil, plant nutrition and fertilizer math, crop physiology, irrigation, tillage and cover crops, permaculture, and farm machinery and units.
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The essential nutrients, how to read deficiency symptoms, what happens to nitrogen in soil, and how to read a fertilizer label and work out rates.
45 total questions
Card #1
Macronutrients
Card #2
Micronutrients
Card #3
Mobile nutrient (within the plant)
1. Corn's lowest, oldest leaves turn yellow in a V shape that starts at the tip and runs down the midrib. Which nutrient is short?
2. Corn's older leaves turn yellow and then brown along their outer edges, while the midrib stays green. Which nutrient is short?
3. Young corn seedlings in a cold, wet spring turn reddish-purple. Which nutrient is the plant most likely failing to take up?
1. Legume roots house nitrogen-fixing bacteria in small swellings called ___.
Hint: Root swellings
2. A nodule that is actively fixing nitrogen is pink or red inside because it contains ___.
Hint: A plant form of a blood protein
3. The soil enzyme that converts urea into ammonium is ___.
Hint: Enzyme names end in -ase
