Brazil - São Paulo

Operational Implementation Plans

Plans for Next Growing Season:

We will try to maintain the current approach, by doing field inventories every 2.5-3 months on the south-western part of the JECAM area (265 sites), mainly covered by croplands. A general inventory will be conducted before april 2017, synchronously with a SPOT7 image acquisition.

 

In situ Data:

We collected 847 GPS point in the field in December 2014, following the JECAM protocol and updated nomenclature for our site specificities. GPS points were chosen along roads to cover most part of the JECAM area (see figure below). GPS points were afterwards converted to polygons based on the images.

During the 2015 and 2016 years, measurements field visits were done every 3 months (March, May, August, November) for a subset of 265 sites located in the “annual crop” area of the image (i.e. South West). The most precise nomenclature was used (species), and other attributes such as irrigation or not, height of the crop, etc. were also recorded.

In February 2016, all the 847 GPS points measured in December 2014 were visited, including the 265 sites located above. Most of the other 582 sites (847-265) were located in areas with a majority of perennial crops i.e. an annual visit is mostly sufficient. These sites are mostly Eucalyptus plantations, sugarcane, pastures, coffee plantations, citrus plantations, pines plantations). Land used changes occurred in a few of these sites, and they were discarded in some of the treatments. This complete dataset field inventory will be done again before april 2017.

Illustration of the 847 polygons of the classified area, measured in December 2014 and January 2016

 

During 2015 and 2016 years, on the 265 sites visited regularly, 96 sites were annual culture fields, others were mainly pasture and sugarcane. These sites presented a large variety of crop cycles, listed in the table and figure below. There are a very large number of combinations of land cover classes through the year. To see a bit more clearly, we have added different colors for soya, corn and “winter cereal”. We can see that many fields alternate between soya and corn, or soya and winter crop, with the soya being planted during the wet season and the corn/winter crop during the dry winter months. For the corn, the scheme is a bit different, because it could be planted all along the year. For the sugarcane, not presented in the figure, the date of harvest could be almost all along the year. Some fields have a succession of 3 different cultures during the year.

 

Example of crop types measured every ~3 months on the same polygons in 2015 and beginning 2016

 

Main Crops Calendar:

©2015 Joint Experiment for Crop Assessment and Monitoring
© HER MAJESTY THE QUEEN IN RIGHT OF CANADA SA MAJESTE LA REINE DU CHEF DU CANADA (2015)