SOIL SCIENCE
This soil property refers to the proportion of sand, silt, and clay.
soil texture
What pest management strategy combines cultural, biological, and chemical methods to minimize crop damage?
Integrated Pest Management (IPM)
What type of feed provides energy mainly in the form of carbohydrates?
concentrates
What economic term describes the additional output gained from using one more unit of input?
marginal product
What crop factor determines the number of plants per unit area?
planting density
The ideal soil pH range for most vegetable crops falls within this range.
5.5–7.0
What type of pest damage results in curling, yellowing, or stunted plant growth without visible chewing marks?
sucking insect damage
What physiological process allows ruminants to regurgitate and re-chew feed?
rumination
What do we call costs that do not change with the level of production?
fixed costs
What crop growth stage is most sensitive to water stress?
flowering stage?
This soil nutrient is most responsible for root development and early plant growth.
phosphorus
This insect pest transmits tungro virus in rice.
green leafhopper
What nutrient deficiency commonly causes poor growth and reduced immunity in livestock?
protein deficiency
What pricing concept occurs when farmgate prices are lower during peak harvest?
supply-induced price decline
What practice improves yield stability by growing two or more crops in the same field?
intercropping
This soil condition limits oxygen availability and often occurs after prolonged heavy rains.
waterlogging
What resistance mechanism allows plants to tolerate pest damage without significant yield loss?
tolerance
This management practice improves animal performance by reducing stress and overcrowding.
proper stocking density
What economic analysis helps farmers decide whether to expand or reduce production?
break-even analysis
What physiological process explains yield reduction under prolonged high temperatures?
heat stress
This process improves soil fertility by converting organic nitrogen into forms plants can absorb.
mineralization
What pest population level indicates when control measures should be applied to prevent economic loss?
economic threshold level
What reproductive technology allows rapid genetic improvement in livestock?
artificial insemination
What principle explains allocating limited farm resources to competing uses?
Opportunity cost
What term refers to the maximum yield of a crop under ideal conditions
yield potential