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What are the main elements that determine soil capacity to produce higher yields? If a plant shows stunted growth as well as yellow leaves then what type of nutrients would be deficient? How to address the issue?
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- Fertile soil is one of the keys to good yield. (i) Explain the roles of clay and organic matter in contributing to soil fertility and cation exchange capacity (CEC). (ii) Name ONE (1) negative effect of low CEC and high CEC soils respectively. Suggest ways to improve low CEC and high CEC soils. (iii) Suggest ONE (1) suitable type of crops for high CEC soil, low CEC soil and loam soil respectively.You have been presented with leaf samples with various nutrient deficiency symptoms shown below. (i) Identify missing nutrients of a, b, c, and d based on Figure 2 below. b Maine Organic Farmers and Gardeners Association University of Massachusetts, Amherst d Allotment Garden Cellmax Nutrients Figure 2: Nutrient deficiency symptoms of tomato Where would you expect to find symptoms of nutrient deficiency for mobile and immobile nutrients? Also, determine the mobility of missing nutrients identified in Question 2 b) (i). (ii)What are the functions of soils in a rice field, and suggest management activities to maintain a healthy soil (a soil that can fully provide its full potential or function both to the plants and animals and the environment).
- Which criteria helps determine which fertilizer to use.Group of answer choices a. Does it contain the needed nutrients? b. Does it readily release those nutrients? c. Expense d. Side effects e) All of the aboveBriefly discuss/ explain the influence of soil pH and Cation Exchange Capacity (CEC) on nutrient retention and nutrient availability.Draw the NPK economy by showing how these nutrients are being added and lost in the soil system (Just a simple illustration-Boxes and Arrows with labels/descriptions - is enough to illustrate the soil nutrient economy) Each of the soil nutrient, N-P-K, should have a separate hand-drawings. Thus, there will be three (3) drawings.
- What are the different methods of fertilizer application or placement?Differentiate one from the other.Mark all the correct answers with regards to plant nutrition: -Sulfur fertilizers are irrelevant in increasing crop yields -Gypsum is the most commonly used soil S amendment -Potassium sulfate should not be applied in alkaline soils In organic farming, legumes need to be added as cover crops, cash crops, intercroping or green manures -High SOM will certainly have S sufficiency to crops -Most soil N is stored as soil organic matter -Only low organic matter soils have S deficciency -Inorganic N fertilizer are the only way to balance soil N fertility _Free living diazotrophs can sustain crop N nutritionExplain any one method of preparation of bio-fertilizers.
- Discuss the relationship between soil resilience and factors of soil formation.How can tissue culture techniques be used to study the effects of environmental factors, such as temperature, humidity, and light intensity, on the growth and development of plant cells and tissues, and how can this knowledge be applied to improve crop yields and plant resistance to abiotic stress?During the formation (genesis) of a soil from parent material, the regolith undergoes many profound changes, which are brought about by variations of four broad soil-forming processes. Explain how these changes are induced by the four main soil-forming processes.