this study was carried out in order to evaluate the changes of nitrogen, phosphor and potassium uptake by wheat and remaining of them in soil under foliar application of leonardite and foliar application of n and k. the experiment was conducted in gorgan university of agricultural sciences and natural resources during 2013- 2014. the experiment was laid out a using split-plot arrangement based ...

Crop residue cover is vital for reducing soil erosion and improving fertility, which an important way of conserving tillage to protect the black in Northeast China. How much crop covers on cropland significance protection. Landsat-8 Sentinel-2 images were used estimate corn coverage (CRC) China this study. The estimation model CRC was established accuracy by optimal combination spectral indices...

Published in Agron. J. 105:721–726 (2013) doi:10.2134/agronj2012.0353 Available freely online through the author-supported open access option. Copyright © 2013 by the American Society of Agronomy, 5585 Guilford Road, Madison, WI 53711. All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, r...

Crop supply and management is a global issue, particularly in the context of climate change rising urbanization. Accurate mapping monitoring specific crop types are crucial for studies. In this study, we proposed: (1) methodology to map two main winter crops (winter wheat barley) northern region Finistère with high-resolution Sentinel-2 data. Different classification approaches (the hierarchica...

Cereal production around the world is critical to the food supply for the human population. Crop productivity is primarily determined by a combination of temperature and precipitation because temperatures have to be in the range for plant growth and precipitation has to supply crop water requirements for a given environment. The question is often asked about the changes in productivity and what...

Crop production is one of the major interactions between humans and natural environment, in process, carbon translocated cyclically inside ecosystem. Data assimilation algorithm has advantages mechanism robustness yield estimation, however, computational efficiency still a obstacle for widespread application. To address issue, novel hybrid method based on combination Biomass Algorithm Wheat (CB...

The occurrence dates of crop phenological events are closely related to the timing agronomic management and therefore key information for agricultural monitoring forecasting as well climate change impact assessment adaptation planning. However, sowing harvesting only variables available in current global datasets. Here, we present 0.5° grid dataset phenology 2000 (the average 1996-2005), called...