{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lec10TranspirationAndWaterStress

5 cm transpiration httpseedsthompson morgancom et

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: deterem the ETcrop by weighing plant. ET-based Irrigation Scheduling • How to determine ETCrop (of a potted plant) – Water potted plant and let drain completely – Weigh potted plant – Place in growing area for 24 hours – Weigh again – Weight • 1 g = 1 ml = 1cm3 of water – Water lost (cm3) ÷ surface area (cm2) = ETCrop (cm) • For example: 200cm3 ÷ 400 cm2 = 0.5 cm Transpiration http://seeds.thompson-morgan.com/ ET-based Irrigation Scheduling if Kc= 0.5 ET0= 3 • Crop Coefficients = KC ETcrop= Kc*ET0= 1.5 – KC = ETCrop ÷ ET0 – If ET0 = 2 cm, then using KC = ETCrop ÷ ET0: • KC = 0.5 cm ÷ 2 cm = 0.25 – Dimensionless number (usually between .1 and 1.2) that is multiplied by the ET0 value to arrive at a crop ET (ETCrop) estimate Transpiration ET-based Irrigation Scheduling • Crop Coefficients = KC – ETCrop = KC x ET0 Transpiration ET-based Irrigation Scheduling • Crop Coefficients = KC – KC = ETCrop / ET0 • Factors affecting KC these are what it depends on: – Species* – Location* – Plant development • Size • Leaf area – Spacing – Health • Presence of disease and or insect pests Transpiration ET-based Irrigation Scheduling • Crop Coefficients = KC – KC = ETCrop / ET0 • Factors affecting KC – Species – Location – Plant development • Size • Leaf area – Spacing* – Health • Presence of disease and or insect pests Transpiration Water Stress Water Stress • Ef...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern