CSES Exam 1 Prep Pack: Agriculture, Soil, & Environmental Science Questions | 2025/26 EXAM UPDATES. VERIFIED.

CSES Exam 1 Prep Pack: Agriculture, Soil, & Environmental Science Questions | 2025/26 EXAM UPDATES. VERIFIED. About This Study Resource: This CSES Exam 1 Study Guide is tailored for students in Crop, Soil, and Environmental Science programs. It covers foundational topics like soil properties, nutrient cycles, crop classification, environmental impacts, and more. With practice questions, key terms, and concept summaries, this guide is ideal for preparing for your first major assessment of the semester. A vegetatively-growing crop plant is subjected to a 13.5 hour photoperiod (10.5 hours of darkness), which is increased by 1/2 hour each week. When the photoperiod reaches 15 hours, the plant starts to flower. This plant species would be - -a long-day plant All stems are identified as such based on the presence of - -nodes Based on the soil textural triangle, a soil with 40% sand and 40% silt would be classified as a - -loam Cation exchange capacity (CEC) is a measure of the ability of the soil to attract and hold cations, and as such - -is directly related to soil pH Compared to C3 plants, C4 plants are - -more likely to be tropical or tropical in origin Crop plants thought to have originated in Africa include - -watermelon, okra, sorghum Distinguish between, and give an example of, a source and a sink, as they relate to photosynthesis and movement of food (sugars) within the plant. - -source is where plant sugars are produced and the sink is where those plant sugars are needed Essential flower parts include the - -pistil and stamen Example of C4 plant species - -corn sorghum sugarcane Example of cation - -potassium calcium magnesium Example of modified stems - -crown rhizomes stolons Examples of cross-pollinated crop - -corn and sorghum Give example of legume - -soybeans, alfalfa, clover, peas, beans Give two major differences between dicots and monocot plants. Use examples if you like. - monocots - one seed leaf in embryo, parallel vein pattern in leaves, fibrous root system dicots - two seed leaves in embryo, net vein pattern, main taproot system Hygroscopic soil water is - -water unavailable to the plant In a given soil, the most variable of the four major components are - -water and air In its most basic form, photosynthesis can be divided into - -light and dark reactions Leaf Canopy - -the configuration of crop leaves in the field • Prevents sunlight from hitting soil • Prevents sunlight from reaching weeds • We want lead canopy to grow as rapidly as possible Light frequencies that are best absorbed by chlorophyll and other plant pigments are - -blues and reds Of the carbon found on earth, the largest amount is in the form of - -Fossil fuels and mineral carbonates (limestone) Of the following, the only plant parts that are involved in asexual reproduction are the - -stems Phloem - -food conducting tissue, move up or down Photoperiod - -length of light in a day, which changes throughout the growing period Photosynthesis converts light energy into chemical en