Week 8 - Soil and nutrients Flashcards
1
Q
The soil profile:
O,A,B,C,R
A
O = organic (detritus)
A = surface soil
B = mainly mineral with some organic
C = Mineral
R = Bedrock
2
Q
Composition of soils
A
25% air, 25% water, 45% minerals, 5% organic matter
3
Q
Some macronutrients
A
Nitrogen, phosphorus, potassium, calcium, sulphur
4
Q
Law of minimum
A
Crop success is not determined by the most abundant resource but by the most deficient
