liming and soil acidity Flashcards
1
Q
if applying potash at a K index of 0 or 1 where should the fertiliser be applied
A
in the seedbed
2
Q
what is the neutralising value of calcium carbonate
A
100% in the lab and 80% in the field
3
Q
what depth should soil acidity tests be done for arable
A
20cm
4
Q
what depth should soil acidity tests be done for grassland
A
15cm
5
Q
what is the optimum soil ph
A
6.5
6
Q
what ph should be aimed for in the soil
A
6.7
7
Q
what is the cause of soil acidity
A
hydrogen ions
8
Q
what effect does calcium carbonate have on soil ph
A
it increases it
9
Q
why may a slightly higher ph help brassica crops
A
it reduces the chance of clubroot
10
Q
A
