Class 11 Floriculturist Chapter 5 Plant Nutrition and Irrigation Solutions English Medium As Per AHSEC New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters Class 11 Floriculturist Chapter 5 Plant Nutrition and Irrigation Question Answer and select need one. Class 11 Floriculturist Chapter 5 Plant Nutrition and Irrigation Notes Download PDF. AHSEC Class 11 Elective Floriculturist Question Answer English Medium.
Class 11 Floriculturist Chapter 5 Plant Nutrition and Irrigation
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. AHSEC Class 11 Floriculturist Textual Solutions are part of All Subject Solutions. Here we have given AHSEC Class 11 Floriculturist Textbook Solutions English Medium for All Chapters, You can practice these here.
Plant Nutrition and Irrigation
Chapter: 5
| SESSION 1: PLANT NUTRIENTS |
| CHECK YOUR PROGRESS |
A. Fill in the Blanks:
1. The elements necessary for metabolic activities of an organism are referred to as __________________.
Ans: Nutrients.
2. The process of supplying nutrients and their intake is known as __________________.
Ans: Nutrition.
3. Green plants draw carbon from atmospheric__________________.
Ans: Carbon dioxide.
4. Accessory structural elements are also called __________________.
Ans: Macro-elements.
5. The mass developed after rotting of the organic matter is termed as __________________.
Ans: Compost.
B. Multiple Choice Questions:
1. ____________ elements are necessary for the growth of plants.
(a) 16.
(b) 14.
(c) 10.
(d) 12.
Ans: (a) 16.
2. The elements required by plants in large amount are called ____________.
(a) Micro-elements.
(b) Macro-element.
(c) Both (a) and (b).
(d) None of the above.
Ans: (b) Macro-element.
3. Accessory structural elements are ____________.
(a) K, Ca, Mg.
(b) Cl, Br, I.
(c) N, P, S.
(d) C, H, O.
Ans: (c) N, P, S.
4. The application of manures in soil increases the ____________.
(a) Biological activities of soil.
(b) Physiological activities of soil.
(c) Moisture retention capacity of soil.
(d) All of the above.
Ans: (d) All of the above.
5. The solid platy residue left after the extraction of oil is known as ____________.
(a) Oil.
(b) Oil cake.
(c) Essence.
(d) None of the above.
Ans: (b) Oil cake.
6. Plant manures are composed of material from __________.
(a) Plant origin.
(b) Animal origin.
(c) Both (a) and (b).
(d) None of the above.
Ans: (c) Both (a) and (b).
7. Plant nutrients manufactured commercially through chemical process are ____________.
(a) Fertilisers.
(b) Biofertilisers.
(c) Manure.
(d) Green manures.
Ans: (a) Fertilisers.
8. Fertilisers that supply more than single nutrients are called ____________.
(a) Sole fertilisers.
(b) Manures.
(c) Biofertiliser.
(d) Mix fertilisers.
Ans: (d) Mix fertilisers.
C. Subjective Questions:
1. How can plant nutrients be classified according to their functions in plants?
Ans: The classification of plant nutrients based on their functions in plants are as under:
(i) Structural nutrients These are of vital importance and required in large quantities and mostly available naturally. These nutrients include Carbon (C), hydrogen (H) and oxygen (O2).
(ii) Accessory structural elements These are also called ‘macro-elements’, which can be supplied through manures and fertilisers. These are essential for the growth and production of plants and formation of proteins. These are nitrogen, phosphorus and sulphur.
(iii) Regulators and carriers These elements are potassium (K), calcium (Ca) and magnesium (Mg), which regulate plant growth and build resistance against crop pests.
(iv) Catalysts and activators Although these are required in very small quantities, they are equally important. These activate various chemical changes within the cell. These are iron (Fe), boron (B), manganese (Mn), molybdenum (Mo), zinc (Zn), chlorine (Cl) and copper (Cu).
2. How are manures different from fertilisers?
Ans: Manures are decomposed organic matter derived from plants and animals. Besides providing a supplement of plant nutrients, manures are beneficial in many ways. They enhance biological activities in the soil, and also improve structure, colour, aeration and water-holding capacity of the soil. Manures are slow in decomposing, hence, they release plant nutrients gradually, which can be used as organic fertilisers in agriculture.
Fertilisers are plant nutrients manufactured commercially from inorganic chemicals. They are ready-to-use nutrients in concentrated forms and contain much higher amounts of nutrients than manure and are, therefore, used in small quantities. These chemicals get washed off through irrigation or rainwater and become unavailable at many instances. Chemical fertilisers being the source of a single nutrient is called a ‘sole fertiliser’. Fertilisers that supply more than one nutrient are called ‘mix’ or ‘complex fertilisers’.
3. Write down the advantages and disadvantages of fertiliser application.
Ans: The advantages and disadvantages of fertiliser application are as under:
Advantages:
(i) Easily available anywhere.
(ii) Calculated amount of nutrients can be applied.
(iii) Required nutrients can be specifically applied.
(iv) Fertilisers can be carried easily because of packing.
(v) Easy to apply in different ways.
(vi) Fertilisers are available in different formulations and concentrations.
(vii) Nutrients are available at low cost.
Disadvantages:
(i) Leaches out or infiltrates with rain or irrigation water.
(ii) Harmful if applied more than the required quantity.
(iii) Responsible for air and water pollution.
(iv) Sometimes, it may have adverse effects on soil properties.
(v) Have to be stored carefully.
4. What are the different types of fertilisers?
Ans: The different types of fertilisers are:
(i) Sole fertilisers: These are the fertilisers that supply only a single nutrient. Sometimes it may be accompanied by a minor element. Sole fertilisers are further grouped according to the nutrients they supply.
(ii) Nitrogenous fertilisers: These are prepared and applied as a source of nitrogen to the crop. Commonly available nitrogenous fertilisers are urea, ammonium sulphate, calcium ammonium nitrate, etc.
(iii) Phosphorus or phosphatic fertilisers: These fertilisers are the main source of phosphorus only. Some commercially available phosphatic fertilisers are single superphosphate, triple super phosphate, dicalcium phosphate.
(iv) Potassic fertilisers: These are applied as a source of potassium. Commonly used potassic fertilisers are muriate of potash and potassium sulphate.
(v) Mixed fertilisers (complex fertilisers): Fertiliser with a source of more than one macro-nutrient for the plant is known as mixed fertiliser. Commonly used mixed fertilisers are di-ammonium phosphate (18:46:0), nitro-phosphate (20:20:0), ammonium phosphate (28:0:0), ammonium phosphate sulphate (16:20:0), calcium ammonium nitrate (8% Ca and 21–27% N), etc.
Almost all fertiliser companies are making soluble and field applicable mixed fertilisers. Now, NPK complex fertilisers are available in varying nutrient contents (19:19:19, 20:20:20, 20:40:0, etc.).
(vi) Fertiliser containing micronutrients: Chemical compounds used as a source of micronutrients are of two types, viz.
(a) Chelates chemical compounds in the form of heterocyclic ring having a metal ion attached by coordinate bonds to at least two non-metal ions, such as EDTA, DTPA HEDTA, EDDHA, NTA, common chelated micronutrients being Zn-EDTA and Fe-EDTA.
(b) Inorganic salts, such as zinc sulphate (ZnSO4 ), copper sulphate (CuSO4 ), ferrous sulphate (FeSO4 ), manganese sulphate (MnSO4 ), etc., are commonly used as micronutrient fertilisers. All these are soluble in water and can be used as soil application or foliar spray.
D. Match the Columns:
| A | B |
|---|---|
| 1. Structural nutrients | (a) Fe, B, Mo. |
| 2. Accessory structural | (b) K, Ca, Mg. |
| 3. Regulators and carriers | (c) N, P, S. |
| 4. Catalysts and activators | (d) C, H, O. |
Ans:
| A | B |
| 1. Structural nutrients | (d) C, H, O. |
| 2. Accessory structural | (c) N, P, S. |
| 3. Regulators and carriers | (b) K, Ca, Mg. |
| 4. Catalysts and activators | (a) Fe, B, Mo. |
| SESSION 2: APPLICATION OF MANURES AND FERTILISERS |
| CHECK YOUR PROGRESS |
| SESSION 3: IRRIGATION AND DRAINAGE |
| CHECK YOUR PROGRESS |
Hi! my Name is Parimal Roy. I have completed my Bachelor’s degree in Philosophy (B.A.) from Silapathar General College. Currently, I am working as an HR Manager at Dev Library. It is a website that provides study materials for students from Class 3 to 12, including SCERT and NCERT notes. It also offers resources for BA, B.Com, B.Sc, and Computer Science, along with postgraduate notes. Besides study materials, the website has novels, eBooks, health and finance articles, biographies, quotes, and more.
