Fig. 1.
Fig. 1.

Monthly mean air temperature and precipitation from January 2005 to December 2007, and 45-yr monthly averages (1963–2007) at the agricultural experimental farm of Padova University in Legnaro, Italy.

 


Fig. 2.
Fig. 2.

Available P content at different soil depths (0–5, 5–10, and 10–20 cm) after 3 yr of alfalfa management at Legnaro, Italy. Data points with the same letters are not significantly different at the 0.05 level of probability (Fisher’s protected LSD). The vertical dashed line indicates soil P content at seeding (April 2005) for the 0- to 20-cm depth.

 


Fig. 3.
Fig. 3.

Exchangeable K content at different soil depths (0–5, 5–10, and 10–20 cm) after 3 yr of alfalfa management at Legnaro, Italy. Data points with the same letters are not significantly different at the 0.05 level of probability (Fisher’s protected LSD). The vertical dashed line indicates soil K content at seeding (April 2005) for the 0- to 20-cm depth.