Q. Define Agronomy ? A. The branch of agriculture science which deals with the principle and practices of soil water and field management. Q. Define Agriculture? A. Agronomy is a art and business which deals with the crop production management with the help of life stock. Q. Define crop and classify the crop on basis of seasons. A. Crop is a plant that can grow and harvested extensively for profit. There are three types of crops on basis of season Kharif season June to November Ravi season November to April Zaid season summer crop March June Q. What do you mean by Annual Crop, biennial crop and perennial crop. A. Annual Crop :- plant is a plant that complete its life cycle from germination to production of seed within a growing season and then dies. Example watermelon, Pea, Etc. Biennial Plants. :- biennial plants is a flowering plant that take place two years to complete life cycle. Example :- Perennial Plants :- p...
Bryophytes • Bryophytes include the various mosses and liverworts that are found commonly growing in the most shaded area in hills. It is also called Amphibians of the plant kingdom. Water for sexual reproduction. It plays important role in plant succession on bare rocks / soils. Root – like, leaf – like or stem – like structure. \the male sex organ is called antheridium. They produce biflagellated antherzoids. The female sex organ archegonium is flask – shaped produces a single eggs. Zygote do not undergo reduction division immediately. Species of Sphagnum, a moss , provide peat. Mosses along with lichens one the first organisms to colonise rocks. Great ecological importance. Reduce the impact of falling rain and prevent soil erosion. The Bryophytes are divided into liverworts and mosses. Live...
Join our Telegram Group ;- GroveStudies Angiosperms The seeds are unclosed in fruits. Smallest Wolffia to tall or Eucalyptus ( over 100 meters). The dicotyledons are characterised by seeds having two cotyledons, reticulate venations in leaves, and tetramerous or pintamerous flowers, i.e, having four or five members in each floral whorls. The monocotyledons on the other hand are characterised is single cotyledons seeds, parallel venation in leaves, & trimerous flowers having three members in each floral whorls. Each ovule has a megaspores mother cell that undergoes meiosis to form four haploid megaspores. Three of then degenerate and one divide to from the embryo sac. Each embryo – sac has a three – called egg apparatus – one egg cell & two synergids, three antipodal cells and two polar nuclei. one of the male gamete fuses with the egg cell (syngamy) to from a zygote. Produces the triplo...
Comments