Phosphorus Placement Effects on Phosphorous Recovery Efficiency and Grain Yield of Wheat under No-Tillage in the Humid Pampas of Argentina

Table 1

Some characteristics of the soil surface at Tandil, Necochea, and Balcarce experimental sites.

Site	OM	AP	pH	Texture	PC	Tillage	Cultivar	Row spacing	Seeding date	Seeding rate	Harvest date
	%	mg kg^−1						(cm)		kg ha^−1
Tandil	5.5	8.9	6.3	Loam	Sb	No-till	Prointa Isla Verde	19.0	August 15	140	December 27
Necochea	5.7	13.9	6.0	Loam	Sb	No-till	Klein Dragon	19.0	August 12	140	December 28
Balcarce	4.3	9.9	6.2	Loam	Sb	No-till	Baguette 19	17.5	July 18	120	December 23

OM: organic matter [66]; AP: available phosphorus (Bray and Kurtz 1945) [27]; PC: previous crop; Sb: soybean.