soil management and fertilisers

Question 1

where do plant nutrients come from

Answer 1

decaying plant litter
breakdown of soil minerrals
addition by humans
commercial fertiliser
manure
lime
other

Question 2

what are the three major macronutrients

Answer 2

nitrogen phosphorous potassium

Question 3

name the macronutrients

Answer 3

nitrogen
phorsphorus
potassium
calcium
magnesium
sulfur

Question 4

macronutrients

Answer 4

used in large quantities by the plants

Question 5

micronutrients

Answer 5

iron zinc manganese copper boron molybdenum chlorine nickel

Question 6

micronutrients

Answer 6

used in small quantities by the plant
extracted from the soil

Question 7

nitrogen is needed for

Answer 7

photosynthesis
component of chlorophyll
protein production- amino acids
growth-atp
reproduction in plants
dna

Question 8

plants deficient in nitrogen show

Answer 8

slow growth
appear pale green from a lack of chlorophyll
necrotic(death) in older leaves

Question 9

phosphorus is needed for

Answer 9

growth and reproduction
production of new cells seed formation

Question 10

plants deficient in phosphorus have

Answer 10

stunted growth
do not produce fruit
show signs of wilting and leaf discolouration

Question 11

potassium is needed for

Answer 11

protein synthesis
translocation of carbonhydrates

Question 12

a lack of potassium leads to

Answer 12

scorching of leaves
reduced crop growth
poor root development
slow growth

Question 13

calcium

Answer 13

need for formation of cells
no develoment of terminal bud

Question 14

magnesium

Answer 14

needed for formation of chlorophyll
chlorosis of lower leaves

Question 15

sulphur

Answer 15

chlorosis of lower leaves

Question 16

iron

Question 17

zinc

Answer 17

stunted growth

Question 18

manganese

Answer 18

grey speck in oats.speckled yellows in sugar beet

Question 19

copper

Answer 19

swayback in sheep

Question 20

boron

Answer 20

heart rot/crown rot in sugar beet

Question 20

molybdenum

Answer 20

whiptail in cauliflower

Question 21

plant available nutrients

Answer 21

between pH 6 and 7
as soil become increasingly acidic or alkaline the availability is reduced
some instances these nutrients are unavailable

Question 21

cobalt

Answer 21

pine disease in sheep

Question 21

how can nutrients and minerals be added to the soil

Answer 21

by frrtilizers and manures

Question 22

fertilizers

Answer 22

manufactured inorganic materials to encourage growth

Question 23

manures

Answer 23

plant and animal waste and is organic

Question 24

what are the two types of fertilizers

Answer 24

straight fertilizers and coumpound fertilizers

Question 25

straight fertilizers

Answer 25

contain one nutrient element

Question 26

compound fertilizers

Answer 26

contain two or more elements

Question 27

fertilizers contain

Answer 27

N P K singly or in a combination

Question 28

soil testing

Answer 28

soil testing helps a farmer todetermine the nutrients available in their land and to determine how suitable suitable an area is for crops growth

Question 29

placing it in the soil

Answer 29

combining it with soil when seeds are sown using a seed drill

Question 30

broadcasting it

Question 31

top dressing