Cropping Systems: Applications, Management and Impact

Phosphorus Dynamic in the Soil-Plant System ... 43

Figure 4. Electron micrograph (SEM) of the same fertilized sample after 360 with a
higer incresase (20X).

Figure 5. Principal components including all variables analyzed in the system under
study (rP, phosphorus rate; rN, nitrogen rate; Pi, inorganic phosphorus; Po, organic
phosphorus; Pe extractable phosphorus; dmY, dry matter yield; grY, grain yield, dmP,
dry matter phosphorus, grP, phosphorus grain; wue, water use efficiency; rcc, rain crop
cycle).

-6 -3 0 3 6

CP 1 (43%)

-6

-3

0

3

6

CP 2 (25%)

Pr Nr

grP

dmP

grY dmY

Pe

Po

Pi

ccrwue

Po/Po+Pi