Use of Biological
Resources
– A Summary
because our teachers do nothing but sit and get salary :)
*but still, no teachers are harmed in the production of this powerpoint, even though I desperately want to*
,Food Production
,RECAP: Factors Affecting Rate of
Photosynthesis
1. Temperature 🌡
• temperature ⬆️ ; rate of photosynthesis ⬆️
• temperature can only speed the rate up till the optimum temperature of
enzymes
• enzymes denature past optimum temperature 😫 → rate starts to decrease
2. Light Intensity ☀️
• stronger light intensity ☀️ ; rate of photosynthesis ⬆️
• trend continues until another factor becomes limiting factor
3. CO2 🌫 (one of the raw materials)
• more CO2 🌫 ; rate of photosynthesis ⬆️
• trend continues until another factor becomes limiting factor
we like emojis :P
,Limiting Factor
whatever factor’s at the lowest availability at that
time
*we are not going to be
understanding it help
farmers because we’re not
farmers increase yield one or mrs petty*
growing crops inside allow farmers to control
these factors
,Greenhouses/ Glasshouses
• usually made out of glass
• things u can manipulate in a greenhouse
• Artificial Heating 🔥
• usually used in temperate countries 🏞
• Artificial Lighting ☀️
• plants can now photosynthesize for longer
• CO2 Concentration of Air Inside 🌫
• plants photosynthesize quicker (more raw material)
• Watering 💧
• you know, like automatic watering and stuff like that lah
• cost consideration
• profits increased by higher yield might be balanced by the extra cost used for controlling the growing conditions
• tropical countriesss (we love tropical countries)
• greenhouses might need to be ventilated to release hot air (we don’t want enzymes to denature )
,Polythene Tunnels
• aka polytunnels
• plastic tunnels that cover the crops
• protect crops grown outside from the effects of weather
• excessive wind 💨
• excessive rain ⛈
• extreme temperatures 🌡
• slightly increase temperature inside the tunnel
• prevent entry of pests 🦟
• damage plants
• bring in diseases that can kill the plants (that’s no good, farmers want 💵
💵 💵)
,Increase Yield – Fertilizers
• increase the amount of key nutrients in soil for crop
plants
• now they grow faster, larger and healthier, more people buy
them, farmer get 💰, everyone happy 😃
• mineral ions need to be replaced regularly if the crop
plants are constantly growing on the same field
• that’s why we need… fertilizers!
,Increasing Yield – Fertilizers
Organic Chemical
Fertilizers Fertilizers
• farmland • dry granules
manure 💩 • sprayed as
• compost 🚜 liquid
,Increasing Yield – Fertilizers
Nutrients provided by fertilizers…
Nitrogen (N2) Phosphorus (P) Potassium (K) Magnesium (Mg)
• absorbed as nitrates (NOx) • absorbed as phosphates • absorbed as potassium • absorbed as Mg2+
✅ use (PO4) compounds ✅ use
• amino acids → protein ✅ use ✅ use • make chlorophyll
• nucleic acids • DNA (sugar phosphate • allow enzyme reactions ❌ deficiency
❌ deficiency backbone!!!) to take place → produce • yellow leaves
• make enzymes ATP and produce food
• stunted/ weak growth
• cell membranes for plants
• yellow leaves
• respiration and growth • make enzymes for
photosynthesis and
❌ deficiency
respiration
• poor root growth
❌ deficiency
• discoloured/ purple
• poor fruit and flower
leaves
growth
• discoloured leaves with
black/ brown spots
, Increasing Yield – Pest Control
⚠️ dangers to crop plants
pests (insects, animals
weed fungi
like moles and mice…)
• damage crops by • outcompete crop • infect crops
eating them plants for space, • spread diseases
water and nutrients
these can be controlled by…
• chemical control → pesticides
• biological control → introducing new species to eat the pests/ weed
Resources
– A Summary
because our teachers do nothing but sit and get salary :)
*but still, no teachers are harmed in the production of this powerpoint, even though I desperately want to*
,Food Production
,RECAP: Factors Affecting Rate of
Photosynthesis
1. Temperature 🌡
• temperature ⬆️ ; rate of photosynthesis ⬆️
• temperature can only speed the rate up till the optimum temperature of
enzymes
• enzymes denature past optimum temperature 😫 → rate starts to decrease
2. Light Intensity ☀️
• stronger light intensity ☀️ ; rate of photosynthesis ⬆️
• trend continues until another factor becomes limiting factor
3. CO2 🌫 (one of the raw materials)
• more CO2 🌫 ; rate of photosynthesis ⬆️
• trend continues until another factor becomes limiting factor
we like emojis :P
,Limiting Factor
whatever factor’s at the lowest availability at that
time
*we are not going to be
understanding it help
farmers because we’re not
farmers increase yield one or mrs petty*
growing crops inside allow farmers to control
these factors
,Greenhouses/ Glasshouses
• usually made out of glass
• things u can manipulate in a greenhouse
• Artificial Heating 🔥
• usually used in temperate countries 🏞
• Artificial Lighting ☀️
• plants can now photosynthesize for longer
• CO2 Concentration of Air Inside 🌫
• plants photosynthesize quicker (more raw material)
• Watering 💧
• you know, like automatic watering and stuff like that lah
• cost consideration
• profits increased by higher yield might be balanced by the extra cost used for controlling the growing conditions
• tropical countriesss (we love tropical countries)
• greenhouses might need to be ventilated to release hot air (we don’t want enzymes to denature )
,Polythene Tunnels
• aka polytunnels
• plastic tunnels that cover the crops
• protect crops grown outside from the effects of weather
• excessive wind 💨
• excessive rain ⛈
• extreme temperatures 🌡
• slightly increase temperature inside the tunnel
• prevent entry of pests 🦟
• damage plants
• bring in diseases that can kill the plants (that’s no good, farmers want 💵
💵 💵)
,Increase Yield – Fertilizers
• increase the amount of key nutrients in soil for crop
plants
• now they grow faster, larger and healthier, more people buy
them, farmer get 💰, everyone happy 😃
• mineral ions need to be replaced regularly if the crop
plants are constantly growing on the same field
• that’s why we need… fertilizers!
,Increasing Yield – Fertilizers
Organic Chemical
Fertilizers Fertilizers
• farmland • dry granules
manure 💩 • sprayed as
• compost 🚜 liquid
,Increasing Yield – Fertilizers
Nutrients provided by fertilizers…
Nitrogen (N2) Phosphorus (P) Potassium (K) Magnesium (Mg)
• absorbed as nitrates (NOx) • absorbed as phosphates • absorbed as potassium • absorbed as Mg2+
✅ use (PO4) compounds ✅ use
• amino acids → protein ✅ use ✅ use • make chlorophyll
• nucleic acids • DNA (sugar phosphate • allow enzyme reactions ❌ deficiency
❌ deficiency backbone!!!) to take place → produce • yellow leaves
• make enzymes ATP and produce food
• stunted/ weak growth
• cell membranes for plants
• yellow leaves
• respiration and growth • make enzymes for
photosynthesis and
❌ deficiency
respiration
• poor root growth
❌ deficiency
• discoloured/ purple
• poor fruit and flower
leaves
growth
• discoloured leaves with
black/ brown spots
, Increasing Yield – Pest Control
⚠️ dangers to crop plants
pests (insects, animals
weed fungi
like moles and mice…)
• damage crops by • outcompete crop • infect crops
eating them plants for space, • spread diseases
water and nutrients
these can be controlled by…
• chemical control → pesticides
• biological control → introducing new species to eat the pests/ weed
