Actual Temperature
12 degrees Celsius
Humidity : 92%
Rainfall : 0.2mm
Wind : Calm
My class was Lisa Short on Soil Water, Essential Plant Nutrients, The Role of Nutrients, Nutrient Deficiencies, Plant Nutrition and Cation Exchange.
Managing soil water requires an understanding of how water behaves in soil, how to identify and removes excess water and how to calculate the amount of irrigation water required. Some of the water retained in the soil pores is available to plants. It is absorbed through the roots and moves up through the plant stems. Most is lost back into the atmosphere by a process called transpiration, which is the loss of water from the leaves and stems of living plants to the atmosphere. Water also evaporates from the surface of moist soils.
Factors that influence the plant's ability to absorb nutrients from the soil (as opposed to influencing the amount of available nutrients in the soil) include :
- soil water content : plant cannot absorb nutrients from dry soils
- physical conditions, compaction, excess water and poor aeration limit root growth or condition
- temperature plants do not absorb nutrients is very cold conditions.
- pest and diseases which also limit root growth and functions
- toxins (eg aluminium) the limit root growth
- nutrient imbalances for examples too much potassium will limit the absorption of magnesium.
Nitrogen - highest concentration in actively growing plant; young leaves, fruits, flowers and fruit tips.
Phosphorous - making of protein and new cells. Particularly important in ripening of fruits and seed germination.
Potassium - water movements between cells, to aid essential chemical reactions. Essential for stem to lengthen, promotes thickening of cells walls, protect plants from disease.
Calcium - needed for cell division as a components of cells walls. Essential in the functioning of growing point and several aspect of root growing.
Magnesium - Chlorophyll molecule has a magnesium atom. No mg no green plants.
Sulphur - all protein contains sulphur. Sulphur is a constituent of amino acids that are part of genetic coding materials and proteins of living things.
The role of Mirconutrients in Plant Growth Iron - essential to make chlophyll and use nitrates, Manganese - photosynthesis and making proteins, Copper - reactions taking parts in plants, Zinc - lengthening of roots, stems and leaves, Boron - new cells for growing points - root tips, Molybdenum - essential for plants to use nitrates to make proteins and Chlorine - a very small amounts are needed.
Cation Exchange held by negative charge on the colloid (aggregated particles) can exchange with cations presented in the soil solution. Lisa Short also demonstrate about the Ions are electrically charged and are either positive or negative. Positive charged ions are called cations and Negative charged ions are called anions.
In the afternoon we have Plant Identification Unit also with Lisa Short under the topic of Conifer (Pinophytes) are gymnosperms. They are cone-bearing seeds plants with vascular tissue all living conifers include cedar. The conifers are now accepted as comprising six to eight families, with a total of 65 - 70 genera and 600 - 630 species. A cone is an organ that contains the reproductive structure in the plant division Pinophyta which are more commonly known as the conifers. The familiar woody cone is the female cone which produce pollen and male cone (pollen cone) is structurally similar across the conifers differing only in small ways from species to species.
Fern (Pteridophyta) is any one of a group of about 12,000 species of plants. They also have stems, leaves and roots like other vascular plants. Ferns first appears in the fossil record 360 million years ago. Ferns in general may be thought of as largely being specialists in marginal habitats, often succeeding in places when various environmental factors limit the success of flowering plants.
Lisa took the class to the backyard of O Block to show some conifers and fern. Class adjourned at 3.00pm.
The role of Mirconutrients in Plant Growth Iron - essential to make chlophyll and use nitrates, Manganese - photosynthesis and making proteins, Copper - reactions taking parts in plants, Zinc - lengthening of roots, stems and leaves, Boron - new cells for growing points - root tips, Molybdenum - essential for plants to use nitrates to make proteins and Chlorine - a very small amounts are needed.
Cation Exchange held by negative charge on the colloid (aggregated particles) can exchange with cations presented in the soil solution. Lisa Short also demonstrate about the Ions are electrically charged and are either positive or negative. Positive charged ions are called cations and Negative charged ions are called anions.
In the afternoon we have Plant Identification Unit also with Lisa Short under the topic of Conifer (Pinophytes) are gymnosperms. They are cone-bearing seeds plants with vascular tissue all living conifers include cedar. The conifers are now accepted as comprising six to eight families, with a total of 65 - 70 genera and 600 - 630 species. A cone is an organ that contains the reproductive structure in the plant division Pinophyta which are more commonly known as the conifers. The familiar woody cone is the female cone which produce pollen and male cone (pollen cone) is structurally similar across the conifers differing only in small ways from species to species.
Fern (Pteridophyta) is any one of a group of about 12,000 species of plants. They also have stems, leaves and roots like other vascular plants. Ferns first appears in the fossil record 360 million years ago. Ferns in general may be thought of as largely being specialists in marginal habitats, often succeeding in places when various environmental factors limit the success of flowering plants.
Lisa took the class to the backyard of O Block to show some conifers and fern. Class adjourned at 3.00pm.
Excellent work.
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