Grade 7 Agriculture – Crop establishment and management Quiz

The correct spacing for planting maize in Kenya is 3x3 ft. This allows the maize plants to have enough space to grow and develop properly.

Black jack is a common weed in maize fields that competes with the maize plants for nutrients and sunlight, affecting their growth and yield.

Top-dressing is the recommended fertilizer application method for maize farming as it helps to provide the plants with nutrients at critical growth stages.

Termites are a common pest that can affect maize crops in Kenya by feeding on the roots and causing damage to the plants.

Drip irrigation is the recommended irrigation method for small-scale vegetable farming as it helps to conserve water and deliver water directly to the roots of the plants.

Powdery mildew is a common disease that can affect tomato plants by causing white powdery growth on the leaves, affecting their photosynthesis and overall health.

The optimal pH range for most vegetable crops to thrive is pH 6-7, as it allows for proper nutrient uptake and overall plant health.

Chemical spraying is the recommended method for controlling weeds in a sugarcane plantation as it helps to effectively kill and prevent the growth of weeds without damaging the sugarcane plants.

Pheromone traps are a management practice for controlling pests in a banana plantation by using pheromones to attract and trap specific pests, reducing their population and damage to the plants.

The optimal temperature range for growing onions in Kenya is 20-30°C, as temperatures outside this range can affect the growth and development of the onion plants.

Grafting is a method of propagation and not crop establishment.

Land preparation helps improve soil structure for better rooting and water infiltration.

Soil fertility is important for crop growth but not directly related to planting spacing.

Thinning helps to space out plants and reduce competition for nutrients, water, and sunlight.

Crop rotation helps reduce pest and disease buildup in the soil, leading to healthier crops.

Fertilization provides essential nutrients to the soil to improve fertility for better crop growth.

Increasing plant density may lead to more competition and potential for weed growth.

Irrigation ensures that crops receive adequate water for growth and development, especially during dry periods.

Beneficial insects help control pest populations, so removing them would be counterproductive to pest management.

Mulching helps to regulate soil temperature, suppress weed growth, and retain soil moisture.

Organic fertilizers help improve soil fertility by providing nutrients and enhancing soil health.

Pest scouting involves monitoring fields to identify pest presence and determine the need for pest control actions.

Grafting is a method of propagation and not typically used for crop harvesting.

Proper post-harvest handling helps maintain crop quality, reduce losses, and improve market value for farmers.

Selling immediately is not a storage method but a marketing strategy after crop harvest.

Grading helps ensure that consumers receive quality products, increasing satisfaction and trust in the crop.

Government storage is not a marketing channel but a storage facility for emergency food reserves or stability purposes.

Value addition helps increase the shelf-life of products, thus expanding market reach and consumer appeal.

Increasing post-harvest losses would be detrimental to crop producers' profitability and sustainability.

Market research helps crop producers understand consumer preferences, market trends, and competitive landscape for informed decision-making.

Monocropping is less sustainable than diversified practices like agroforestry, crop rotation, and zero tillage.

Climate-smart agriculture aims to promote sustainable practices that enhance crop production resilience to climate change impacts.

Cover crops help improve soil structure, suppress weeds, and enhance nutrient cycling, reducing soil erosion instead of increasing it.

IPM aims to manage pest populations sustainably, using a combination of techniques while minimizing chemical pesticide usage.

Soil health components include soil structure, fertility, and biodiversity; pollution would be detrimental to soil health.

Crop diversification helps farmers access different market opportunities and reduce income risks associated with mono-cropping.