Đang chuẩn bị liên kết để tải về tài liệu:
A Dictionary of Earth Sciences third edition

Không đóng trình duyệt đến khi xuất hiện nút TẢI XUỐNG

absolute pollen frequency (APF) *Pollen data from sediments, expressed in terms of the absolute numbers for each *species, *genus, or *family, per unit volume of sedi- ment and, where deposition rates are known, per unit time. In certain circumstances this approach gives clearer information than does the traditional way of expressing pollen data as *relative pollen frequencies (RPFs). APFs are particularly useful in site comparisons in which one or more high pollen producers vary. For example, when trees first appear in the regional pollen rain their prolific pollen may, in an RPF method, give the impression of declining herbaceous species, whereas exami- nation by an APF method will show constant values for herb species

TÀI LIỆU LIÊN QUAN

Dictionary of Accounting Fourth edition

Dictionary of Applied Math for Engineers and Scientists

Ebook Dictionary of architecture and building construction

Oxford Collocation: Dictionary for students of English

Ebook Super Mini Phrasal Verb Dictionary

Discriminative dictionary pair learning for image classification

Ebook Dictionary of travel, tourism and hospitality: Part 1

Ebook Dictionary of travel, tourism and hospitality: Part 2

Dictionary of Petroleum Exploration, Drilling and production

Ebook Dictionary of computer and internet terms: Part 1
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.