Soil Phosphorus Dynamics of Wheat-Based Cropping Systems in the Semiarid Region of Argentina

Table 1

Crop sequences in the studied production systems and mean annual rainfall.

Years from the beginning	WG	WW	WL	Annual rainfall (mm)
0
1	Grass/oat	Wheat	Wheat	683.7
2	Wheat	Wheat	Wheat	998.1
3	Grass/oat	Wheat	Wheat	965
4	Wheat	Wheat	Red clover	611.9
5	Grass	Wheat	Red clover	781.8
6	Wheat	Wheat	Red clover	647.1
7	Grass	Wheat	Wheat	697.1
8	Wheat	Wheat	Wheat	612
9	Grass	Wheat	Wheat	1194.7
10	Wheat	Wheat	Red clover	1108.3
11	Grass	Wheat	Red clover	678.9
12	Wheat	Wheat	Red clover	641.6

Wheat (Triticum aestivum); red clover (Trifolium repens).