Agriculture Honor

Agricultural Activities

Requirements

Make a list of the components of soil. Why is soil important for plants?
Answer: Soil has mineral matter (45%, sand/silt/clay), organic matter (5%, humus), water (25%), air (25%), and microorganisms. Importance: nutrients, physical support, water, and oxygen for roots. — The composition of soil was systematized by Vasily Dokuchaev in 1883, considered the father of modern pedology; his classification of soil horizons (A, B, C) is still the basis of international soil science today.
Explain how plants obtain nutrients and convert them into food. Explain the difference between primary, secondary, and micronutrients.
Answer: Plants absorb nutrients through their roots and use photosynthesis (light+CO₂+water) to make food. Primary: N, P, K (large quantity). Secondary: Ca, Mg, S. Micronutrients: Fe, Zn, B, Cu, Mn (small quantity). — The classification of plant macro- and micronutrients was established by Justus von Liebig in 1840 with the 'Law of the Minimum', a fundamental principle of modern agriculture that guides rational fertilization used globally today.
Know and present a report on the ways we can keep the land fertile through fertilization with chemical and natural fertilizers, crop rotation, and when to use them.
Answer: You use chemical fertilizers (NPK) for quick correction of a specific deficiency, natural fertilizers (manure, compost, humus) for sustainable enrichment, and crop rotation (legumes after grasses) to replenish nitrogen. — Crop rotation dates back to Mesopotamia (3000 B.C.) and was optimized by Charles Townshend in the 18th century with a 4-crop system (wheat, turnip, barley, clover) that doubled European agricultural production by keeping the soil continuously nourished.
Explain the difference between clayey, sandy, and loamy soils. Mention 3 types of plants that thrive in each of them.
Answer: Clay soils retain a lot of water (good for rice, wheat, soybeans), sandy soils drain quickly (carrot, sweet potato, watermelon), loamy soils balance both (corn, beans, vegetables). Each type has adapted plants. — Soil texture is classified by the USDA according to the proportion of sand (>2mm), silt (0.05-2mm), and clay (<0.05mm), determining the capacity to retain water and nutrients for adequate regional agricultural cultivation.
What is erosion? How can it be prevented?
Answer: Erosion is the wearing away of soil by water, wind, or human action. Prevention: permanent vegetation cover, contour planting, terraces, crop rotation, riparian forest, and conservation practices. — Accelerated erosion causes the loss of 36 billion tons of agricultural soil annually according to FAO 2019, with Brazil being one of the most affected countries. Conservation practices reduce losses by up to 90%, as proven.
Know and present a report on the handling of the following work tools in agriculture: shovel, hoe, rake, and watering can.
Answer: You use a shovel (to dig and move earth), a hoe (to prepare beds, weed), a rake (to gather leaves, level soil), and a watering can (to water plants with controlled pressure). Keep them clean and sharp after use. — Manual agricultural tools have evolved since the Bronze Age (3000 B.C.); the Brazilian hoe has been traditional since Portuguese colonization and is standardized by INMETRO in length and shape for rural use.
Identify through images and know in general terms the agricultural machines, traditional and modern, used in the agricultural production process.
Answer: You cite: traditional (animal-drawn plow, plough, manual thresher) and modern (tractor, combine harvester, planter, sprayer, agricultural drones, GPS for precision agriculture). Each one for a specific stage of cultivation. — Brazilian agricultural mechanization received a decisive boost from the rural modernization plan of the 1970s, and Brazil is currently the 4th largest producer of tractors in the world, with John Deere and Massey Ferguson leading the national market.
Present a written report of at least 300 words or an oral one of 5 minutes about the importance of agriculture, describing its main characteristics.
Answer: Agriculture is the foundation of world food supply, job creation, and economic development. Characteristics: planned cultivation of plants, animal husbandry, conservation techniques, and technology adapted to the climate. — Agriculture emerged 12,000 years ago in the Fertile Crescent region, marking the transition from hunter-gatherers to sedentary societies, a process known as the Neolithic Revolution that gave rise to the first civilizations.
Test the germination of 3 seed varieties — 100 seeds of each variety. Record the percentage after the 3rd, 5th, and 7th day.
Answer: You moisten a paper towel, distribute 100 seeds of each variety, keep them in a place with a constant temperature (20-25°C), water daily, and count the germinated seeds on the 3rd, 5th, and 7th day to calculate the percentage. — The germination test follows the RAS standard (Rules for Seed Analysis) of the Brazilian MAPA, standardized by ISTA (International Seed Testing Association) since 1924 and used worldwide for commercial certification.
Identify and name at least 10 weeds common in your region and explain the best way to eliminate them using natural or chemical methods.
Answer: You identify common weeds: nutsedge, sourgrass, hairy beggarticks, milkweed, pigweed, purslane, dandelion, Bermuda grass, morning glory, dittander. Elimination: manual weeding, mulch, selective herbicides when necessary. — Weeds cause losses of 15-30% in Brazilian crops annually according to Embrapa, with nutsedge (Cyperus rotundus) considered the worst weed in the world by the globally recognized World Weed Society.
Identify 6 pests (insects) and 6 diseases common to crops. Specify which plants they usually attack, reporting the best way to prevent and eliminate their occurrence.
Answer: You cite pests: aphid, fall armyworm, coffee borer, leafhopper, mealybug, whitefly. Diseases: rust, powdery mildew, anthracnose, late blight, rot, viral mosaic. Prevention: rotation, biological control, organic pesticides. — Embrapa estimates annual losses of US$ 17 billion in Brazil from agricultural pests and diseases, with Asian soybean rust being the most destructive, with spending of US$ 2 billion/year on fungicides for adequate national control.
Locate at least 2 sources of meteorological information and explain how this type of information can be useful to the farmer.
Answer: You consult: INMET (National Institute of Meteorology), CPTEC/INPE (Forecasting Center), Climatempo, Embrapa Agrometeorology, AccuWeather. Useful for planning planting, irrigation, harvesting, and preventing weather-related losses. — Weather forecasting reduces agricultural losses by up to 30% according to a 2020 Embrapa study, especially in drought-sensitive crops such as corn and soybeans, being crucial in Brazilian climate-risk zones.
Know the purpose of the following activities:
- Plow
- Harrow
- Drain
- Weed
- Cultivate
- Irrigate
- Reap (harvest)
Answer: 1) Plowing: turn over and loosen the soil, flipping the top layer to aerate the earth, bury crop residue and weeds, facilitating root development. 2) Harrowing: pass the harrow after plowing to break up the clods, crumble and level the soil, leaving it ready for planting. 3) Draining: remove or drain off excess water from the soil, preventing waterlogging that rots the roots and harms the plants. 4) Weeding: remove the weeds that compete with the crop for water, light, and nutrients, keeping the field clean. 5) Cultivating: tend to the development of the plants during growth (stir the soil between the rows, control pests and weeds), favoring good production. 6) Irrigating: supply water to the plants artificially when rainfall is insufficient, ensuring the moisture needed for germination and growth. 7) Reaping (Harvesting): gather the produce when the fruits, grains, or plants are at the right point of maturity, ending the crop cycle. — Plowing with a plow at 20-30 cm depth. Harrowing with a disc harrow. Sowing according to the crop (in rows or broadcast). Chemical (NPK) or organic (manure, compost) fertilization. Other activities: weeding, irrigation, pest control, harvesting. Each one with a specific purpose in the agricultural cycle. Correct management increases productivity and protects the soil from erosion and long-term degradation.
List and identify, through photographs or images, at least 10 birds common in your region and explain their importance to the farmer.
Answer: Useful birds: great kiskadee, thrush, rufous hornero, smooth-billed ani, southern lapwing, woodland owl, crested caracara, great egret, vulture, and pauraque. They control pests by eating insects, larvae, rodents, and snakes. They spread seeds (zoochory), pollinate some plants, and indicate environmental status. Predators such as hawks reduce the population of harmful rodents. — The great kiskadee and the thrush eat flies, grasshoppers. The smooth-billed ani hunts ticks on cattle. The southern lapwing warns of intruders. Owls and hawks hunt rodents. Egrets follow the tractor capturing insects from the turned soil. Vultures clean up carrion, preventing disease. The rufous hornero eats ants. Hummingbirds pollinate flowers. Management: preserving riparian forests and avoiding pesticides protects beneficial birds for the rural agricultural environment.
Assist in the planting, cultivation, and harvesting of at least 4 different crops, keeping a report of the work carried out, as well as the problems encountered.
Answer: Choose varied crops (corn, beans, lettuce, tomato). Follow the cycle: soil preparation, planting, irrigation, weeding, pest control, harvest. Record in a report: date, activity, observations, problems (pests, weather), solutions. Include photos, measurements, and quantities. Document the lessons learned. A final report with charts and conclusions organizes the practical experience for presentation. — Common crops: corn (90-120 days), beans (90 days), lettuce (45-60 days), tomato (90-120 days). The regional calendar varies. Frequent problems: aphid, caterpillar, lack of water, nutrient deficiency. Organic solutions: natural sprays, rotation. A well-made report has a schedule, descriptions, before/after photos, field notes. Presenting it to the unit strengthens the collective learning of the participating Pathfinder.
Visit a cooperative in your locality or a farmer-support institution and find out how these organizations help the farmer. Write a report about your visit.
Answer: Schedule a visit, prepare questions, bring a notebook and a camera. Observe the structure, employees, and services (collective purchasing, processing, sales, technical assistance, credit). Interview managers and members. The report describes services, benefits, organization, and personal impressions about the local cooperative work. — Agricultural cooperatives follow cooperative principles (free membership, democratic management). Brazilian examples: Coamo, Aurora, Cocamar. Services: purchase of fertilizer and seeds at scale, drying, storage, marketing, easy credit, technical assistance. Benefits: cost reduction, market access, political clout. The visit offers a real view of organized agribusiness and the social role of cooperatives in contemporary Brazil today.
Visit a rural property where agriculture is practiced and prepare a report highlighting the main activities carried out there.
Answer: Schedule a visit, bring a notebook and a camera. Observe crops, animals, infrastructure, machinery, and management practices. Interview the farmer about routine, difficulties, and marketing. The report describes the property, activities, challenges, and personal lessons about rural life and work. — Properties vary: monoculture (soybeans, corn), family polyculture, livestock, organic agriculture, agroforestry. Observe the production system: conventional or agroecological. The interview reveals motivation, empirical and scientific knowledge. Include photos, a sketch of the property, a list of species, and the routine. Lessons: the complexity of rural work, the importance of land and food, current challenges such as climate change and the agricultural market.