Tiếng Việt
1. What is Gibberellin (Gibberellin)? Origin of Gibberellin (Gibberellin): Gibberellin (Gibberellin) is a plant hormone that regulates plant growth and affects a variety of developmental processes such as proliferating, germinating, sleeping, flowering, gene expression , enzyme stimulation and senescence of leaves as well as fruit etc. Gibebrelin (Gibberellin) is the second phytohormone discovered after auxin […]
Author Archives: AGRONOMY ENGINEER
13
Sep
Sep
1. Abxixic Acid (Acid Abscisic) What is it ? Origin Abxixic Acid (Acid Abscisic). – Acid Abscisic, also known as Dormin, Dormic Acid (DMA), is a group of natural and man-made substances considered as a plant hormone – a growth inhibitor. In 1961, two American scientists, Liu and Carn, isolated a substance in the form […]
09
Sep
Sep
1. What is cytokinin (Cytokinin)? Cytokinin origin. Cytokinin is the third group of plant hormones discovered after auxin and gibberellin in plant growth promoters. Natural citrusin (Cytokinin) in plants was first extracted in 1963 by Letham and Miller in the crystalline form of corn kernels called zeatin, which is 10 to 100 times stronger than […]
09
Sep
Sep
1. What is Humic Acid? What is Humate ? Humic: Humic acid is an important component of organic matter in soils formed by the accumulation and degradation of incomplete residues in anaerobic conditions. The content of humic acid in organic humus depends on geological features, vegetation cover, anaerobic digestion time. Humic acid is one of […]
09
Sep
Sep
1. What is Amino Acid? Amino Acids are important organic organic compounds that contain the (-NH2) and carboxylic acid (-COOH) groups, along with a side-chain (group). R in each amino acid. The main elements of amino acids are carbon, hydrogen, oxygen, and nitrogen, and some of the other elements are present in the substituents of […]
09
Sep
Sep
1. The importance of organic matter? – Reserve nutrients for plants – Food source of soil organisms – Provide CEC of land – Increase soil water holding capacity – Reduce Al toxicity when soil pH is low – Improve soil structure (but do not change the structure) 2. A summary of organic matter, organic humus […]
09
Sep
Sep
Zinc suction cups are dissolved in water. Useful types of zinc in the soil: – Zn2+ in solution – A large amount of Zn2+ complex with organic matter – Solubility of Zn Mineral Relatively Low: 10-5 – 10-7 M – pH dependent activity – Strong absorption on the oxide minerals – A little kept on […]
09
Sep
Sep
Cultivars are mainly B4O27-, HBO32- and BO33-. Bo forms in soil: – H3BO3 in solution – Free from the main mineral: Tourmaline – pH dependent activity – Dry areas, Bo accumulated into alkaline borates (Sodium Borates – Borax) – Dry areas, plants can be poisoned Bo. The more serious the irrigation water has high Bo […]
08
Sep
Sep
Plants can absorb iron in the form of Fe2+ and Fe3+, almost all iron on the earth’s crust is in the form of Fe3+, iron in the form of Fe2+ is absorbed and persists more in the crop, This is relatively soluble, but easily oxidized to Fe3+, then precipitated. Fe3+ is insoluble in high neutral […]
08
Sep
Sep
Types of soil Cu: – Cu2+ in solution – Large amounts of Cu2+ complex with organic matter – more than any other trace elements – The solubility of Cu2+ minerals is relatively low: 10 – 6 – 10 – 8 M – pH dependent activity – Strong absorption on the oxide minerals – Some are […]
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